|Year : 2013 | Volume
| Issue : 2 | Page : 81-85
CD10 and CA19.9 immunohistochemical expression in transitional cell carcinoma of the urinary bladder
Ahmed Salahaldeen Mohammed1, Husam Hasson Ali2, Ban Jumaa Qasim2, Mohammed Kassim Chaloob1
1 Ministry of Health, Baghdad, Iraq
2 Department of Pathology and Forensic Medicine, College of Medicine, Al-Nahrain University, Baghdad, Iraq
|Date of Submission||16-Dec-2011|
|Date of Acceptance||23-Mar-2012|
|Date of Web Publication||3-Apr-2013|
Ban Jumaa Qasim
Department of Pathology and Forensic Medicine, College of Medicine, Al-Nahrain University, Baghdad
| Abstract|| |
Background: Transitional cell carcinoma of the bladder is the most common malignancy affecting the urinary tract ranking the 5 th among males and the 9 th among females' cancers in Iraq. The prognosis depends largely on the histological grade and stage of the tumor at diagnosis; however, there is no reliable parameter predicting the risk of recurrence or progression; molecular and immunological markers may be required to estimate the individual prognosis of patients as well as for effective diagnosis and treatment.
Objectives: To evaluate CD10 and CA19.9 immunohistochemical expression in transitional cell carcinoma of the urinary bladder and to correlate this expression with the grade and stage of the tumor.
Materials and Methods: This study was retrospectively designed. Forty-nine cystoscopy specimens of urothelial carcinoma of the bladder were retrieved from the archival materials of the Specialized Surgical Hospital and Al-Khadhmiya Teaching Hospital in Baghdad for the period from January 2010 to June 2011. Three sections of 5-μm thickness were taken from each case. One section was stained with Hematoxylin and Eosin; the other two were stained immunohistochemically with CA19.9 and CD10.
Results: Immunohistochemical expression of CA19.9 and CD10 had a significant correlation with WHO 2004 grade of urothelial carcinoma. There was no significant correlation between CA19.9 and CD10 immunohistochemical expression with stage.
Conclusions: CA19.9 and CD10 immunohistochemical expression could be of value in assisting the differentiation between high and low-grade urothelial carcinoma cases and consequently in determining the prognosis in such cases.
Keywords: Transitional cell carcinoma, urinary bladder, CA19.9, CD10
|How to cite this article:|
Mohammed AS, Ali HH, Qasim BJ, Chaloob MK. CD10 and CA19.9 immunohistochemical expression in transitional cell carcinoma of the urinary bladder. Urol Ann 2013;5:81-5
|How to cite this URL:|
Mohammed AS, Ali HH, Qasim BJ, Chaloob MK. CD10 and CA19.9 immunohistochemical expression in transitional cell carcinoma of the urinary bladder. Urol Ann [serial online] 2013 [cited 2020 Apr 5];5:81-5. Available from: http://www.urologyannals.com/text.asp?2013/5/2/81/110002
| Introduction|| |
Urothelial carcinoma or formerly called transitional cell carcinoma of the urinary bladder is the 7 th most common cancer diagnosed worldwide and the 4 th most common cancer diagnosed in males and the 9 th most common cancer diagnosed in females in USA.  It represents the 5 th most common cancer in males and the 9 th most common cancer in females in Iraq,  with a male to female ratio of 3:1.  Nearly 80% of patients are between 50 and 80 years of age.  Approximately 75-85% bladder cancer patients present with disease confined to the mucosa,  have a prolonged clinical course in which the patient experience multiple recurrences after local resection without tumor progression. In contrast, a smaller but significant percentage of patients have advanced and muscle-infiltrative tumor at the time of diagnosis.  The prognosis depends largely on the histological grade and the stage of the tumor at diagnosis.  The carbohydrate antigen CA19.9 (Sialyl Le-a) is a blood group-related antigen and its expression requires the expression of Lewis a blood group antigen  which is a cancer-associated phenomenon,  CA19.9 is also known to be a ligand for the cell adhesion molecule called ELAM-1, involved in the extravasation of cells from the bloodstream and of particular importance in the adhesion of human epithelial cancer cells to vascular endothelial cells.  This adhesion is proposed to be involved in the hematogenous metastasis of cancer cells.  CD10 is a surface zinc-dependent enzyme metalloprotease that inactivates various bioactive neuropeptides,  in addition to its enzymatic function, CD10 protein has a direct role in signal transduction pathways that regulate cell growth and apoptosis and because of its structural similarity to the matrix metalloproteases in the stroma, CD10 is thought also to affect invasion and metastatic potential of tumor cells by altering the cellular microenvironment.  Few studies had been published in evaluating CD10 and CA19.9 immunohistochemical expression in urothelial carcinoma of the urinary bladder. The aim of this study is to evaluate CD10 (common acute lymphocytic leukemia antigen) and CA19.9 immunohistochemical expression in transitional cell carcinoma of the urinary bladder and to correlate this expression with various histopathological parameters including grade and stage.
| Materials and Methods|| |
In this retrospective study, formalin-fixed paraffin-embedded tissue blocks were collected from the archive materials of the Specialized Surgical Hospital and Al-Khadhmiya Teaching Hospital, covering the period from January 2010 to June 2011. The paraffin blocks represent 49 cases of urothelial carcinoma of the bladder removed surgically by transurethral resection of the bladder. Clinicopathological parameters such as the histological type, histological grade and pathological stage, were obtained from the available histopathological reports. An informed consent was taken from patients. An absolute confidentiality of the patients' vital information was maintained for ethical purposes and an ethical approval was obtained from institutions in which the study was carried out.
Three sections of 5-μm thickness were taken, the first was stained by Hematoxylin and Eosin (H and E) for histopathological reassessment of (staging, grading, histological type) of the tumor; the other two sections were stained immunohistochemically using three steps-indirect streptavidin method for CD10 and CA19.9 monoclonal antibodies manufactured by Dako, Denmark.
Regarding CA 19.9, brown staining of the cytoplasm is considered positive. Each stained urothelial tumor section was analyzed for both presence and extent of staining. The extent of staining was classified into one of four phases compared with the control tissue samples on the slide: ,
(0): When coloration is negative.
(+1): When coloration is weak, clearly visible only at an intense increase.
(+2): When coloration is of moderate intensity, clearly visible only at median increase. (+3): when coloration is intensely positive, clearly visible at low increase.
Brown staining of the cell membrane and/or cytoplasm by CD10 was considered positive, with a 5% cut-off point in tumor cells. The extent of immunoreactivity was scored semiquantitatively according to the following criteria: 
(Negative): <5% positive cells.
(+1): 5%-50% positive cells.
(+2): >50% positive cells by counting the maximum number of stained cells (1000 cells) in 10 high-power spots.
For quality control, a negative control had been processed identical to that of patients' samples without adding the primary antibody for (CA19.9 and CD10). For positive control, sections from normal liver were stained for CD10, while sections from colorectal carcinoma were considered as positive control for CA19.9.
Statistical analysis was performed using SPSS v18.00 (statistical package for social sciences) and Microsoft Excel 2007 programs. Data analysis was done using Chi-square test for Tables with frequencies. P value is considered statistically significant when it is less than 0.05.
| Results|| |
A total of (49) paraffin blocks of transitional cell carcinomas of the bladder were included in this retrospective study. According to the 2004 grading system of urothelial carcinoma of the bladder 26/49 (53.06%) of the cases were of high grade and 23/49 (46.93%) of the cases were of low grade [Figure 1] and [Figure 2], [Table 1]. The distribution of cases of urothelial carcinoma of the bladder according to the pathological T-stage of urothelial carcinoma according to AJCC/UICC was as follow: Stage Ta was 10/49 (20.4%), Stage T1 was 32/49 (65.3%) and stage T2 was 7/49 (14.3%) [Figure 3].
|Figure 1: Low‑grade papillary urothelial carcinoma of the bladder H and E (×10)|
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|Figure 2: High‑grade papillary urothelial carcinoma of the bladder H and E (×10)|
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|Figure 3: Pie chart showing the distribution of urothelial carcinoma cases according to AJCC/UICC pathological T‑stage of the selected cases|
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|Table 1: Histological distribution of urothelial carcinoma cases according to 2004 WHO grading system|
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There was a significant correlation between CD10 immunohistochemical expression and the (WHO 2004) grade of urothelial carcinoma (P value 0.003) [Table 2], [Figure 4]. A significant correlation was found between immunohistochemical expression of CA19.9 and (WHO 2004) grade of urothelial carcinoma (P value 0.021) [Figure 5], [Table 2]. There was a significant correlation between CD10 immunostaining score and the 2004 urothelial carcinoma grading system (P value 0.002) [Table 3]. However, the correlation between immunohistochemical scoring expression of CA19.9 and the 2004 grading of urothelial tumors was not statistically significant (P value 0.06) [Table 4]. There was no significant correlation between the CD10 and CA19.9 immunohistochemical expression and the AJCC/UICC stage of urothelial carcinoma (P value 0.239) and (P value 0.283), respectively [Table 5]. No significant correlation between CA19.9 and CD10 immunoscoring and AJCC/UICC T-staging of urothelial carcinoma (P value 0.18) and (P value 0.472), respectively [Table 6].
|Figure 4: High‑grade invasive urothelial carcinoma of the bladder showing intense CD10 immune reaction score +3 (×10)|
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|Figure 5: Low‑grade papillary urothelial carcinoma of the bladder showing strong (score +3) immunohistochemical reaction of CA19.9 (×4)|
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|Table 2: Distribution of CA19.9 and CD10 expression according to the WHO 2004 grading of urothelial carcinoma|
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|Table 3: Immunohistochemical expression score of CD10 marker in relation with the WH0 2004 grading system of urothelial carcinoma|
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|Table 4: Distribution of CA19.9 immunostaining score according to the WHO 2004 urothelial carcinoma grade|
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|Table 5: Distribution of the CA19.9 and CD10 expression in urothelial carcinoma cases according to T stage|
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|Table 6: Relation between CA19.9 and CD10 immunoscoring and the AJCC/UICC stage of urothelial carcinoma|
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| Discussion|| |
To the best of our knowledge, this is the first study in Iraq assessing the immunohistochemical expression of CD10 and CA 19.9 in urothelial carcinoma of the bladder using the WHO 2004 grading system of urothelial carcinoma.
The present study revealed a significant correlation between the WHO 2004 grade of urothelial carcinoma cases and the immunohistochemical expression of CA19.9 (P value was 0.021), CA19.9 was over expressed immunohistochemically in low-grade urothelial carcinoma than in high-grade tumors, and these results were supported by studies done by Chuang and Liao  and Kajiwara et al.,  on the other hand no significant correlation was found between immunohistochemical scoring of CA19.9 and the WHO 2004 grade of urothelial carcinoma cases; despite that there was a trend toward significance (P value 0.06) in which moderate and strong immunohistochemical scoring of CA19.9 was found more in low-grade tumors while negative staining was associated with high-grade tumors, taking in consideration that to the best of this knowledge; this study is the only study in which the 2004 grading system of urothelial carcinoma had been used in evaluating CA19.9 immunohistochemical expression. There was a significant correlation between both CD10 immunohistochemical (expression and scoring) and the (WHO 2004) grade of urothelial carcinoma (P = 0.003, 0.002 respectively), similar results were obtained by Bahadir et al.  Kandemir et al.  and Murali et al.  The relation between CA19.9 immunohistochemical (expression and score) and the AJCC/UICC pathological T-staging of urothelial carcinoma in our study revealed that there was no significant correlation between such parameter and both CA19.9 immunohistochemical expression and score, these findings were in accordance with Chuang and Liao  and Kajiwara et al.  There was no significant correlation between both immunohistochemical (expression and score) of CD10 and the AJCC/UICC pathological T-staging of urothelial carcinoma, which was in agreement with a study done by Kandemir et al.,  and disagreed with other studies done by Bahadir et al.  and Abdou  who found a significant correlation between immunohistochemical (expression and score) of CD10 and the AJCC/UICC pathological T-staging of urothelial carcinoma. Such discrepancies can be explained by difference in sample size; taking in consideration the small sample size of Abdou AG, moreover, improper staging of the specimens due to subjective errors in assessing the stage or improper transurethral resection technique in which deeper tissues especially the muscular layer had not been taken, may contribute to under or over estimation of staging in these cases which in turn affects the number of cases in each stage,  finally, using a universal immunohistochemical scoring method for evaluating CD10 marker in urothelial carcinoma of the bladder may decrease such discrepancies in results, since each study done on urothelial carcinoma of the bladder with CD10 immunohistochemical marker had used a different scoring method such variations in scoring systems will definitely affect the number of positive cases, ultimately affecting the correlation significance.
In conclusion, this study revealed that CA19.9 and CD10 immunohistochemical expression could be of valuable significance in the differentiation between high and low-grade urothelial carcinoma cases and consequently in determining the prognosis in such cases.
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[Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5]
[Table 1], [Table 2], [Table 3], [Table 4], [Table 5], [Table 6]
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