Abstract | AIMS: Recent studies have demonstrated that cathepsin K seems to be a powerful marker in identifying renal perivascular epithelioid cell neoplasms ( PEComas). However, the expression in extrarenal PEComas has not been well characterized due to their rare incidence. Our aim was to investigate the expression of cathepsin K in a wide spectrum of extrarenal PEComas and evaluate its potential diagnostic usefulness in comparison with other commonly used markers. METHODS AND RESULTS: Twenty-three cases of PEComa (liver, n = 9; lung, n = 1; broad ligament of uterus, n = 1; vertex subcutaneous soft tissue, n = 1; abdominal wall, n = 1; and kidney, n = 10) were selected for study. All displayed a high percentage of cells with moderately to strongly positive reactions for cathepsin K (mean 91%; range 80-100%). HMB45, Melan-A and smooth muscle actin (SMA) were expressed in 78, 87 and 87% of cases, respectively, with various percentages of positive cells (mean, 34, 40 and 38%; range 0-80, 0-90 and 0-90%). Transcription factor E3 (TFE3) was expressed strongly in only three cases; none exhibited evidence of TFE3 gene fusion or amplification. CONCLUSIONS:
Cathepsin K appears to be more powerful than other commonly used markers in diagnosing a wide spectrum of PEComas and distinguishing them from the majority of human cancers.
|
Authors | Qiu Rao, Liang Cheng, Qiu-yuan Xia, Biao Liu, Li Li, Qun-li Shi, Shan-shan Shi, Bo Yu, Ru-song Zhang, Heng-hui Ma, Zhen-feng Lu, Pin Tu, Xiao-jun Zhou |
Journal | Histopathology
(Histopathology)
Vol. 62
Issue 4
Pg. 642-50
(Mar 2013)
ISSN: 1365-2559 [Electronic] England |
PMID | 23379905
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
|
Copyright | © 2012 Blackwell Publishing Ltd. |
Chemical References |
- Basic Helix-Loop-Helix Leucine Zipper Transcription Factors
- Biomarkers, Tumor
- TFE3 protein, human
- CTSK protein, human
- Cathepsin K
|
Topics |
- Adult
- Basic Helix-Loop-Helix Leucine Zipper Transcription Factors
(metabolism)
- Biomarkers, Tumor
(metabolism)
- Broad Ligament
(pathology)
- Cathepsin K
(metabolism)
- Cell Count
- Female
- Humans
- Kidney Neoplasms
(enzymology, pathology)
- Liver Neoplasms
(enzymology, pathology)
- Male
- Middle Aged
- Perivascular Epithelioid Cell Neoplasms
(enzymology, pathology)
- Uterine Neoplasms
(enzymology, pathology)
- Young Adult
|