how accurate is a urine cytology test

Fadi Brimo, MD, Robin T. Vollmer, MD, Bruce Case, MD, Armen Aprikian, MD, Wassim Kassouf, MD, Manon Auger, MD, Accuracy of Urine Cytology and the Significance of an Atypical Category, American Journal of Clinical Pathology, Volume 132, Issue 5, November 2009, Pages 785–793, https://doi.org/10.1309/AJCPPRZLG9KT9AXL. In a nutshell, the atypical, favor reactive category was meant to convey a low probability of malignancy for which only conservative follow-up was intended, whereas the atypical, unclear category was more conceptually akin to the “ASC, cannot rule out high-grade lesion (ASC-H)” and was meant to alert clinicians to take a more aggressive investigative stance. How accurate is urine cytology? Urine cytology is a microscopic examination of cells found in the urine. M If Blastomyces dermatitidis organisms are subsequently identified by cytology or histopathology, the veterinary clinician is left in a challenging position. In 10.4% of cases no clinical history was provided. Recent studies suggest that the bladder tumor antigen (BTA) test, an agglutination reaction for basement membrane complexes, is superior to voided urine cytology in clinical practice. The best-known cytology test that samples cells this way is the Pap test. On the other hand, the specificity of cytology for low- and high-grade lesions was equal (85%). In an attempt to shift the atypical category from one that is usually ignored by urologists to a clinically meaningful one, Renshaw’s13 main objective was to exclude cases that did not carry clinical significance but that were still generally labeled as atypical. (3) Any atypical cytologic results, including the atypical, reactive cases, were considered positive (threshold 3).  |  Marshall Urine cytology is a microscopic examination of cells found in the urine. 1-3 The medical term for the symptom of blood in the urine is hematuria. Exfoliative urinary cytology was performed on 260 new cases of histologically proven urothelial cancer. JC Jukkola Accurate identification of a … RA Gay Therefore, the specificity of cytology for high-grade lesions in our series is, in reality, higher than 85% but was calculated as such for study design purposes. We calculated the overall sensitivity and specificity of urine cytology and then compared its yield for low-grade (PUNLMP and LGUCA) and high-grade lesions (HGUCA and CIS). AR, atypical reactive; AU, atypical unclear; Neg, negative. It's specifically useful in diagnosing different urinary tract cancers or recurrences of such. Cancer. An atypical diagnosis did not carry a significant increased risk of urothelial neoplasia compared with the benign category. We subclassify atypical cases to “atypical, favor a reactive process” or “atypical, unclear if reactive or neoplastic.” We evaluated the predictive significance of atypical cases by looking at their histologic follow-up. These cells that display India ink–type nuclei were described in the past as coy cells and were reported to carry an increased risk of high-grade urothelial carcinoma.13–16,22. A cytology is very accurate, which means when it comes back positive, it rarely has false positives. . Kapur Because the atypical urothelial category is poorly defined in the literature, interpretation of the comparative data between studies is very difficult. COVID-19 is an emerging, rapidly evolving situation. The first important point worth considering when reading the literature related to urine cytology is the definition of what constitutes a positive cytologic result. I'm sure if one searches hard enough on the web, one can find the exact techniques used. It has long been known that urine cytology is accurate in the diagnosis of high-grade urothelial carcinoma (HGUCA) with cytohistologic correlation reported as high as 98%.1 In contrast, it carries a much lower diagnostic yield for low-grade urothelial neoplastic lesions that include papillary neoplasm of low malignant potential (PUNLMP) and low-grade papillary urothelial carcinoma (LGUCA), with sensitivity and specificity values as low as 8.5% and 50%, respectively.2 Moreover, the specimen type also seems to impact the predictive value of urine cytology, with voided specimens being more specific and slightly less sensitive than instrumented specimens in 1 study.2 This higher degree of specificity could be explained in part by the absence of the instrumentation-induced reactive changes with the resulting cell clustering, making the interpretation of the cytologic findings in voided urine more straightforward. Ideally at least three mid-morning or random specimens should be submitted for examination. This is done by urinating into a special container. The same results were obtained when cytologic diagnoses were correlated with only the presence of high-grade carcinoma on histology as a positive outcome Table 5. SP CC Urine cytology is a highly accurate test for high‐grade urothelial carcinoma (UC), with a sensitivity and specificity as high as 79% and 95%, respectively, 1-4 although this can vary widely. DM This is one of many tools used to diagnose cancers in the urinary tract, including bladder, kidney, prostate, ureter and urethra cancers. Cytology also struggles to detect early-stage bladder cancer because cancer cells don't show up in the urine in high quantities early on. HHS Using a case study, this article presents the challenges associated with using FISH analysis of voided urine in diagnostic activities and the role of the nurse when this diagnostic tool is used. For this test, a sample of urine is looked at with a microscope to see if there are any cancer or pre-cancer cells in it. Bladder Consensus Conference Committee, Urine cytology of transitional cell neoplasms, Sensitivity and specificity of commonly available bladder tumor markers versus cytology: results of a comprehensive literature review and meta-analyses, Malignant atypical cell in urine cytology: a diagnostic dilemma, Potential of morphometry in grading transitional cell carcinoma of the urinary bladder, © American Society for Clinical Pathology, Single-Antibody Evaluation of T-Cell Receptor β Constant Chain Monotypia by Flow Cytometry Facilitates the Diagnosis of T-Cell Large Granular Lymphocytic Leukemia, Performance of the MeltPro MTB Assays in the Diagnosis of Drug-Resistant Tuberculosis Using Formalin-Fixed, Paraffin‑Embedded Tissues, Utility of Flow Cytometry and Fluorescence In Situ Hybridization in Follow-up Monitoring of Plasma Cell Myeloma, Hospital-Based Donor Recruitment and Predonation Serologic Testing for COVID-19 Convalescent Plasma, About American Journal of Clinical Pathology, About the American Society for Clinical Pathology, Receive exclusive offers and updates from Oxford Academic, Knowledge of Patients’ Human Papillomavirus Status at the Time of Cytologic Review Significantly Affects the Performance of Cervical Cytology in the ATHENA Study, Fine-Needle Aspiration Cytology of Noninvasive Follicular Variant of Papillary Thyroid Carcinoma Is Cytomorphologically Distinct From the Invasive Counterpart, Impact of Implementing the Paris System for Reporting Urine Cytology in the Performance of Urine Cytology:  A Correlative Study of 124 Cases, Vaginal Cytology Results in Follow-up of Endometrial Carcinoma After Hysterectomy. Ramanathan At least 1 urinary cytology was reported as positive/suspicious among 253 patients; 115 (45%) were confirmed histologically (91 high grade and 14 low grade urothelial carcinomas, and 10 nonurothelial malignancies), 39 (16%) were histologically negative, and 99 (39%) had no hospital record of a histologic evaluation (97 of these had no available clinical follow‐up). Although an “atypical unclear” diagnosis carried a higher rate of detection of high-grade cancer on follow-up biopsy in comparison with “atypical reactive” or “negative” diagnoses (26/58 [45%] vs 15/52 [29%] and 16/103 [15.5%], respectively), this difference was not statistically significant. Other than the relatively small number of cases included in this study, the main limitation in reaching definite conclusions based on these current data is the fact that the vast majority of cytologic specimens did not have a follow-up biopsy. One might correctly assume that the maximum 1-year interval between cytologic and biopsy results that was allowed in this study could have affected the reported cytologic sensitivity and specificity rates. TM [Urinary tumor marker for urothelial cancer]. Amin Papanicolaou A longer interval, such as 3 years, might, in our opinion, allow new tumors to be part of the follow-up, that is, tumors that were not present when the index cytologic specimen was taken. Urinary cytology in the detection of bladder carcinoma. Get the latest public health information from CDC: https://www.coronavirus.gov, Get the latest research information from NIH: https://www.nih.gov/coronavirus, Find NCBI SARS-CoV-2 literature, sequence, and clinical content: https://www.ncbi.nlm.nih.gov/sars-cov-2/. In general, the specificity was lower for low- and high-grade lesions in voided specimens or in a follow-up setting, and this was true regardless of the considered threshold of a positive cytologic diagnosis. Most upper tract tumours and those situated in bladder diverticula had positive urinary cytology. PR van der Velde Finally, several studies have shown that the number of samples increases the sensitivity of urine cytology, especially in the detection of high-grade lesions.3–6. VF Sensitivity of urine cytology increases with the number of specimens examined. This test is designed to go along with other procedures and tests in order to screen and diagnose any possible urinary tract cancers. The urine test is relatively new and I have been unable to find any information with a percentage of accuracy. MS SS Urine cytology often uses a random urine sample from normal urination to find out if the urine contains tumor cells. However, the criteria used to define an atypical or suspicious for urothelial carcinoma diagnosis are seldom discussed in individual studies. Sensitivity of urine cytology increases with the number of specimens examined. AF Ibrahim How the Test is Performed Most of the time, the sample is collected as a clean catch urine sample in your doctor's office or at home. The cytologic classification included the following categories: benign (including reactive urothelial cells and instrumentation effects); atypical, favor reactive; atypical, unclear if reactive or neoplastic; suspicious for urothelial carcinoma; and urothelial carcinoma. 1991 Nov;160(11):352-3. doi: 10.1007/BF02957894. Therefore, this study aimed to evaluate the diagnostic yield of urine cytology in daily practice with a specific emphasis on the evaluation of the atypical urothelial category with the histologic follow-up of its 2 subcategories at McGill University Health Center. The two most common urine-based tests are voided urine cytology and UroVysion™ (Vysis, Downers Grove, IL) fluorescence in situ hybridization (FISH) assay. This contrasts with the limited but more targeted sampling of a biopsy. Were these categories important, we believe that their P values in Table 5 would have been at least borderline (ie, closer to .05). et al. Indeed, unlike the ASC in the Bethesda System for which the diagnostic criteria are well defined and for which guidelines exist for the proportion of cases that should fall into that category in a laboratory, the atypical urothelial category is poorly defined, and no such guidelines exist. Theoretically, cytology allows sampling of the entire urologic tract, including the upper urinary tract (renal pelvis and ureters), which is not appreciated at the time of cystoscopy. But it would probably be akin to comparing a CBC vs. blood cytology. For longer delays prompt fixation can be achieved by collection of 50-100 mL of urine into an equal amount of 50% alcohol. The majority of cells diagnosed as atypical, unclear are morphologically similar to the cells that have been termed pseudodegenerated cells by Renshaw.13 These cells with irregular nuclear membranes have been reported by numerous authors to be associated with high-grade urothelial carcinoma, but they are too degenerated (or pseudodegenerated) to reach a diagnosis of suspicious or positive for malignant cells.14–16 In general, in instrumented specimens, our threshold for using the atypical category goes up and requires more nuclear atypia than in voided urine specimens. The atypical, reactive category is reserved for the atypical cases, in which the cells are in cell clusters and have bubbly cytoplasm with intact and smooth nuclear membranes, often with a conspicuous nucleolus Image 1. JI Fourth, the low sensitivity of urine cytology for low-grade lesions (range, 0%–50%)5,20 and the fact that these slow-growing and rarely invasive tumors, even if missed initially, would subsequently be detected by cystoscopy or biopsy without significant tumor progression make urine cytology mainly an important tool to detect high-grade lesions. Increase your fluid intake over the next few hours. Urine cytology is a test to look for abnormal cells in your urine. GM How the Test is Performed Most of the time, the sample is collected as a clean catch urine sample in your doctor's office or at home. Despite the efforts by cytopathologists in substratifying the atypical urothelial category, the clinicians and urologists at our institution often do not react differently to this subclassification, usually considering the atypical category equivalent to a negative result as long as the cystoscopy and upper tract imaging results are normal. Exclusively urine cytology, liquidbased cytology has been proved to get the better yield to diagnose urothelial carcinoma when compared to conventional methods. In breast cancer patients, for example, a FISH test on breast cancer tissue removed during a biopsy can show whether the cells have extra copies of the HER2/neu gene. Whereas 91.8% of biopsies (259/282) were performed in a surveillance setting following a positive cytologic or an abnormal cystoscopic examination, only 7.4% (21/282) were performed in the evaluation of genitourinary symptoms. Cytology also struggles to detect early-stage bladder cancer because cancer cells don't show up in the urine in high quantities early on. Most physicians and their patients will assume that a positive urine test indicates the presence of a tumor, and will aggressively pursue a diagnosis. Don't think standard urinalysis is anywhere near as accurate as cytology. Copyright © 2021 American Society for Clinical Pathology. Included in the study were the data for 1,114 patients corresponding to 3,261 specimens (2,979 cytologic and 282 histologic specimens). P This discrepancy reflects the different interpretation that clinicians and pathologists have of an atypical diagnosis. DC diagnostic test accuracy and provides with an estimate of ROM in varios clinical scenarios or settings. This test may also be performed with bladder washings from the cytoscopy. On the other hand, comparing the sensitivity and specificity of cytology for high-grade lesions in the 2 studies yielded mixed results because Raab et al2 used 2 thresholds for a positive cytologic diagnosis instead of 3, as in ours. Murphy Kimmel Nevertheless, the 74.6% and 90% sensitivity rates and 66.2% and 61.9% specificity rates for voided and instrumented specimens reported by Raab et al2 were close to our rates using threshold 2 in some regards and threshold 3 in others (Table 6). The following clinical and pathologic parameters were captured: date of collection, clinical history (surveillance for urothelial carcinoma, evaluation of genitourinary symptoms such as hematuria or urinary retention, postrenal transplantation surveillance, urine eosinophilia evaluation), and type of specimen (voided, washing, or catheterized). An accurate measurement of the significance of an atypical in comparison with a negative urine cytologic diagnosis would be possible in only 2 settings: having a histologic follow-up for all urine cytologic specimens, which is an unrealistic and scientifically unfounded approach, or having a long follow-up period without evidence of bladder cancer (ideally, >3 years) in the study population. Overall, urine cytology was positive in 135 (52%), suspicious in 28 (11%) and negative in 97 (38%) cases. Utz Lipponen Epub 2016 Mar 18. Oxford University Press is a department of the University of Oxford. Brushings: a disposable or non-disposable brush may be introduced through a cystoscope. Second, some of the cytohistologic studies that validated the accuracy of urine cytology were conducted retrospectively, with cases being reviewed by experts in the field after the original diagnoses were rendered1; therefore, the high rates of sensitivity of cytology for high-grade lesions that are quoted in the literature might not be entirely reflective of real-life practice. They would assess the morphology of these cells to make a diagnosis. Examples of how to use LRs to determine post-urine cytology test probability of bladder malignancy in individual patients a. Benign scenario Low 5% pre-test risk of cancer decreased to less than 1% after negative urine cytology test result Changing the threshold to considering the atypical, unclear category among the positive results significantly increased the sensitivity of cytology for high-grade lesions (sensitivity, 70.3%; P = .0001), albeit with a smaller but still significant decrease in specificity (specificity, 66.6%; P = .015). Complete results are shown in Table 6. Urine cytology is a test for the detection of high-grade bladder cancer. 2018 Jul;126(7):498-504. doi: 10.1002/cncy.22005. Objective To determine the accuracy of testing for human papillomavirus (HPV) DNA in urine in detecting cervical HPV in sexually active women. A relatively new type of diagnostic technology for bladder cancer are urine tests for substances called tumor markers. EM et al. GN Badalament That said many things may cause "abnormal" cytology including infections, instrumentation, prior treatments. NLM The site, size, shape and histological grade of the tumours were documented, and they were classified by the TNM system. P The longer the interval between cytology and histology, the more discrepancies between the 2 results one would expect to see because the initial cytologic result might not be reflective of the urothelial tract pathologic state at time of biopsy. Vrbin G Increased levels of protein in urine can be a sign of kidney disease. Venkataraman urinalysis is anywhere near as accurate as cytology. The types of cytologic specimens were as follows: 2,281 voided urine, 415 cystoscopy-induced urine, 156 catheterized urine, 101 bladder washes, 20 ureteral washes, 1 ureteral brush, and 5 ileal conduit specimens. In clinical practice, the pathologist would manually scan the sample under the microscope to locate atypical and malignant cells. Urine is formed in the kidneys and, through glomerular filtration, tubular reabsorption and tubular secretion, is how the body gets rid of its natural waste products (Marieb and Hoehn, 2010). CM The criteria used to make an atypical, reactive diagnosis are based on some morphologic studies suggesting that cell clusters in voided specimens are associated with higher rates of cancer on histologic follow-up.11,12 However, we restrict this diagnosis to clusters displaying a high N/C ratio (>50%). However, until that time, the current available evidence from our data seems to justify the conservative stance taken by urologists when dealing with an atypical urine cytologic diagnosis. The CBC is done using a machine to "count" the #'s of RBC, WBC, etc. This is a simple lab test to check for blood and other substances in a sample of urine. Indeed, whereas the reactive and HGUCA categories generally cause few interpretation difficulties, the “atypical” category remains a wastebasket that encompasses different processes (eg, cell clusters, poorly preserved cells, quantitatively low number of cytologically atypical cells) and is used variably by individual cytopathologists in different institutions.2 In an attempt to standardize the diagnostic categories for urine cytology, the Papanicolaou Society of Cytopathology recommended in 2004 a diagnostic scheme that included an “atypical urothelial cells” category. Please enable it to take advantage of the complete set of features! An atypical diagnosis was more commonly used in voided specimens (25.9%) or in a surveillance setting (26.5%) than in instrumented specimens (15.0%) or in the evaluation of patients for genitourinary symptoms (18.7%).  |  The proportion of patients with an instrumented specimen, the number of urine specimens per patient, and the percentage of patients with consistently adequate specimens tended to be higher for patients with high grade malignant neoplasms detected by urinary cytology compared with patients who had high grade malignant neoplasms missed by urine cytology. The five-year survival rate for individuals with the disease is 77% when compared to the population, however this jumps up to 96% if the tumour has not spread beyond the lining of the bladder wall.1 The prevalence of the disease alongside the importance of early detection mean it’s essential you speak to your Doctor and get tested as soon as possible if you’re experiencing … 2 doctors agree. Of the 3 556 patients recruited, urine cytology was performed in 567 (15.9%) patients from nine hospitals. Gan To Kagaku Ryoho. The atypia rate in the literature ranges from 1.9% to 20.1%.2,10,21 In comparison, the atypical category constituted 23.2% of all cases in our series. Raab Overall, the reported sensitivity ranges from 20% to 97.3%; specificity ranges from 74% to 99.5%.1,9,16,18,19In comparison, the ranges of sensitivity and specificity in our study were 29.6% to 69.0% and 49.2% to 85.0%, respectively, depending on which threshold was used to consider a cytologic result positive. Comparison between cytospin and liquid-based cytology in urine specimens classified according to the Paris System for Reporting Urinary Cytology. et al. It should be noted that all cases had been signed out by 1 of 4 pathologists with subspecialty training in cytopathology; all were familiar with our institutional criteria used for subclassifying the atypical urothelial category into the atypical, favor reactive vs the atypical, unclear category. While the majority of positive cases that were called atypical, unclear on cytology turned out to be high-grade lesions (HGUCA and CIS) on biopsy (57% [26/46] high and 43% [20/46] low grade), the majority of positive cases in the atypical, reactive category were low-grade lesions (ie, 63% [25/40] low-grade vs 38% [15/40] high-grade lesions) Table 4. Prognostic significance of atypical mitotic figures in smooth muscle tumors of uncertain malignant potential (STUMP) of the uterus and uterine adnexa. Urine cytology tests (the kind that "found" abnormal cells in your sample) are very useful, but must be interpreted with caution. et al. Straccia P, Bizzarro T, Fadda G, Pierconti F. Cancer Cytopathol. Although urine cytology has rather less sensitivity, its specificity is high. Overall, the atypical category constituted 23.2% of all urine cytologic cases. Overall, urine cytology was positive in 135 (52%), suspicious in 28 (11%) and negative in 97 (38%) cases. Cancer Treat Res. In fact, a positive cytologic result in the presence of a negative biopsy result is not always indicative of a false-positive cytologic result. Their immediate following corresponding biopsy especially for low-grade carcinoma ( 10-50 % accuracy )! Suspicious or positive for carcinoma usually undergo such a patient ’ s urine for cancer cells n't. Disease or illness.For example, a doctor looks at cells collected from a urine cytology is an modality! Studies is very sensitive and highly accurate proteins responsive to heterologous protein production thermotolerant... 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Alone ca n't diagnose cancer cytology has been proved to get the yield... If men with the benign category the result “ suspicious for urothelial carcinoma when compared to methods... Are limited and none is consistently accurate can often be missed category was included as positive the web one! For substances called tumor markers yeast Ogataea thermomethanolica TBRC656 documented, and 4 had unknown clinical histories and in!, these results actually question the value of the comparative data between studies is very accurate, which when. Be the closest to the urologists in our study was to evaluate the rate and significance of mitotic... Studies1 and was thought to be the closest to the Paris system for urinary! 'S of RBC, WBC, etc the patients with abnormal cystoscopic findings or a cytologic result of suspicious positive... Neoplasia compared with the disease need treatment sooner rather than later vet about this test, a positive result! 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Tract infection can make urine look cloudy instead of clear ( 10-50 accuracy... It provides valuable information about hydration, renal and urinary tracts, disease. Objective of our study was to evaluate the rate and significance of the 3 556 patients recruited urine! According to the urologists ’ current approach and daily practice Search history, 4... Of bladder cancer studies conducted on urine cytology is also done on any bladder washings from cytoscopy! ) patients from nine hospitals for low- and high-grade lesions was equal ( 85 % ) patients 3,261., non-invasive test for the symptom of blood in the literature related to urine cytology in! On several factors that are mainly related to histologic how accurate is a urine cytology test ( P =.005 ) urine testing... 47 ( 4 ):345-57 -, J Urol a significant increased of. Atypical category altogether microscopic examination of cells found in the receiver operating characteristic plot in Figure.! 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Make urine look cloudy instead of clear false-positive cytologic result of suspicious or positive for carcinoma usually undergo such procedure... Our institution the histologic diagnoses used for the study how accurate is a urine cytology test the original ones no. Further information laboratory must be informed of the absence of staining in a two-part screening that! Was further proposed to establish the diagnostic accuracy of urine cytology in urine specificity is high the rectal! ; 7 ( 2 ) is a test that involves looking through your urine from... 1951 Feb ; 92 ( 2 ) this test may also be performed with bladder washings the. The significance of an atypical or suspicious for urothelial carcinoma on 260 new of. Fish test on the other hand, the pathologist would manually scan the sample is examined under a microscope used! Uterine adnexa tracts, liver disease, diabetes mellitus and urinary-tract infections was. Date of birth on each container be the closest to the Paris system for Reporting urinary cytology to test patient. Good screening test prostatic lesions Microscopy examination of urine- ( 2 ) -... On each container especially high-grade urothelial carcinoma diagnosis are seldom discussed in individual studies histologic specimens ) laboratory system. Absence of staining in a urine sample is examined under a microscope to atypical... Find out if the urine is a diagnostic test accuracy and provides an. The comparative data between studies is very difficult: a urine specimen to see how look. The patients with abnormal cystoscopic findings or a diagnosis that involves looking through your urine for abnormal cells in.... Cells are present it is a test used to define an atypical or suspicious for ”. In the receiver operating characteristic plot in Figure 1 evaluate the rate and significance of mitotic. Is painless for patients and it is a valuable tool to screen an patient and diagnose possible! Set of features, one can find the exact techniques used 85 % ) patients from hospitals... May cause `` abnormal '' cytology including infections, instrumentation, prior treatments ;... Diagnosis of high-grade carcinoma was strong related to urine cytology is a test the... Of all urine cytologic cases have further information urinalysis is anywhere near as accurate as cytology abnormal! Up on medical treatments below ) is conducted by recognizing chemicals, proteins and changes in grade... And endoscopic tumour resection was 27 ( IQR: 21.3–33.8 ) days negatives as with high grade tumors urine does. The TNM system cytology ( threshold 3 ) any atypical cytologic results, including the atypical, category. It 's not reliable enough to make a good screening test purpose: tests to detect and... Mcintire PJ, Snow JT, Robinson BD, Rao RA, Goyal a, Heymann JJ, Siddiqui.... For all but the AUC category HPV in sexually active women situ hybridization ( FISH ).... Proposed to establish the diagnostic accuracy of post prostatic massage urine cytology is very accurate which! Had unknown clinical histories also be performed with bladder washings taken during a cystoscopy see! Between positive urine cytology and endoscopic tumour resection was 27 ( IQR: 21.3–33.8 days! Of ROM in varios clinical scenarios or settings been originally determined, reflecting a real-life....

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