Semiquantitative Smoothelin Expression in Detection of Muscle Invasion in Transurethral Resection and Cystectomy Specimens in Cases of Urinary Bladder Carcinoma
Afr. j. urol. (Online)
; 17(1): 6-10, 2011.
Article
in English
| AIM
| ID: biblio-1258101
Responsible library:
CG1.1
ABSTRACT
Objectives:
To examine the usefulness of smoothelin - a new immunohistochemical (IHC) marker that is expressed predominantly in visceral smooth muscle - in recognizing muscularis propria (MP) in transurethral resection (TUR) and matched cystectomy specimens and to compare thepattern of its expression in muscularis mucosae (MM) and MP in radical cystectomy specimens.Methods:
IHC staining for smoothelin was performed in 49 cases of urothelial carcinoma removed by radical cystectomy (16 had undergone TUR before the cystectomy).Results:
In cystectomy specimens; smoothelin staining in the MP was strong (+3); moderate (+2) and weak (+1) in 49; 44.9and 6.1of cases; respectively; whereas smoothelin positivity in the MM was absent and weak in 77.6and 22.4of cases; respectively. In TUR specimens; smoothelin immunoreactivity was moderate to strong in 68.8and weak in 6.3of cases and all of them proved to have MP invasion in cystectomy specimens.Conclusion:
Smoothelin is a useful marker for the detection of MP in TUR specimens. Moderate to strong smoothelin staining of the muscles included in TUR specimens and split by the tumor is a sign of MP invasion. It may be useful in cancer staging and treatment decision making
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Index:
AIM (Africa)
Main subject:
Urinary Bladder Neoplasms
/
Cystectomy
/
Neoplasm Invasiveness
Type of study:
Diagnostic study
Language:
English
Journal:
Afr. j. urol. (Online)
Year:
2011
Type:
Article
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