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Diagnostic utility of p53 and CK20 immunohistochemical expression grading urothelial malignancies.

Mumtaz S, Hashmi AA, Hasan SH, Edhi MM, Khan M - Int Arch Med (2014)

Bottom Line: Majority of patients (80%) were seen in 45 to 90 years age group.Diffuse positive expression of cytokerain 20 was noted in 33 cases (68.8%) of high grade and 19 (40.4%) low grade tumors.Strong positive expression of p53 was seen in 35 cases (72.9%) of high grade while only 17 cases (36.2%) of low grade tumors showed strong p53 expression.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Histopathology, Liaquat National Hospital and Medical College, Karachi, Pakistan.

ABSTRACT

Introduction: Current grading system in application by WHO/ISUP divides urothelial malignancies in low and high grade by morphologic criteria while strict segregation may become cumbersome in limited tissue specimens. As grading these carcinomas are of utmost prognostic significance after depth of invasion, therefore we evaluated the role of immunohistochemical expression of p53 and cytokeratin 20 as an adjuctive tool in grading urothelial carcinoma.

Methods: The study was conducted in Aga khan university hospital, Histopathology section from December 2010 till June 2011 for duration of six months. It involved 95 cases of urothelial carcinomas diagnosed on trans-uretheral resection specimens of bladder growth. Immunohistochemical expression of p53 and cytokeratin 20 was performed according to standard protocols and correlated with grade and depth of invasion.

Results: There were 48 cases (50.5%) of low grade and 47 cases (49.5%) of high grade urothelial carcinoma included in the study. Male to female ratio was 4.3:1. Majority of patients (80%) were seen in 45 to 90 years age group. Diffuse positive expression of cytokerain 20 was noted in 33 cases (68.8%) of high grade and 19 (40.4%) low grade tumors. Strong positive expression of p53 was seen in 35 cases (72.9%) of high grade while only 17 cases (36.2%) of low grade tumors showed strong p53 expression.

Conclusion: Significant difference in expression of Cytokeratin 20 and p53 was found between low and high grade urothelial carcinoma. Therefore we suggest combined use of these markers may be helpful in assigning grade to urothelial carcinoma especially when histologic features are borderline.

No MeSH data available.


Related in: MedlinePlus

P53 immunostaining in low grade Urothelial carcinoma showing positive expression in 5 to 10% of cells.
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Figure 6: P53 immunostaining in low grade Urothelial carcinoma showing positive expression in 5 to 10% of cells.

Mentions: Remarkable difference in expression of p53 was noted in two tumor grades (Figures 5 and6). The strong positive expression of p53 was seen in 35 cases of high grade (72.9%) while only 17 cases (36.2%) of low grade tumors revealed strong expression (Table 3).


Diagnostic utility of p53 and CK20 immunohistochemical expression grading urothelial malignancies.

Mumtaz S, Hashmi AA, Hasan SH, Edhi MM, Khan M - Int Arch Med (2014)

P53 immunostaining in low grade Urothelial carcinoma showing positive expression in 5 to 10% of cells.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4119421&req=5

Figure 6: P53 immunostaining in low grade Urothelial carcinoma showing positive expression in 5 to 10% of cells.
Mentions: Remarkable difference in expression of p53 was noted in two tumor grades (Figures 5 and6). The strong positive expression of p53 was seen in 35 cases of high grade (72.9%) while only 17 cases (36.2%) of low grade tumors revealed strong expression (Table 3).

Bottom Line: Majority of patients (80%) were seen in 45 to 90 years age group.Diffuse positive expression of cytokerain 20 was noted in 33 cases (68.8%) of high grade and 19 (40.4%) low grade tumors.Strong positive expression of p53 was seen in 35 cases (72.9%) of high grade while only 17 cases (36.2%) of low grade tumors showed strong p53 expression.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Histopathology, Liaquat National Hospital and Medical College, Karachi, Pakistan.

ABSTRACT

Introduction: Current grading system in application by WHO/ISUP divides urothelial malignancies in low and high grade by morphologic criteria while strict segregation may become cumbersome in limited tissue specimens. As grading these carcinomas are of utmost prognostic significance after depth of invasion, therefore we evaluated the role of immunohistochemical expression of p53 and cytokeratin 20 as an adjuctive tool in grading urothelial carcinoma.

Methods: The study was conducted in Aga khan university hospital, Histopathology section from December 2010 till June 2011 for duration of six months. It involved 95 cases of urothelial carcinomas diagnosed on trans-uretheral resection specimens of bladder growth. Immunohistochemical expression of p53 and cytokeratin 20 was performed according to standard protocols and correlated with grade and depth of invasion.

Results: There were 48 cases (50.5%) of low grade and 47 cases (49.5%) of high grade urothelial carcinoma included in the study. Male to female ratio was 4.3:1. Majority of patients (80%) were seen in 45 to 90 years age group. Diffuse positive expression of cytokerain 20 was noted in 33 cases (68.8%) of high grade and 19 (40.4%) low grade tumors. Strong positive expression of p53 was seen in 35 cases (72.9%) of high grade while only 17 cases (36.2%) of low grade tumors showed strong p53 expression.

Conclusion: Significant difference in expression of Cytokeratin 20 and p53 was found between low and high grade urothelial carcinoma. Therefore we suggest combined use of these markers may be helpful in assigning grade to urothelial carcinoma especially when histologic features are borderline.

No MeSH data available.


Related in: MedlinePlus