Pigmented Perivascular Epithelioid Cell Tumor (PEComa) of the Kidney: A Case Report and Review of the Literature.
- Author:
Hyeyoon CHANG
1
;
Wonkyung JUNG
;
Youngran KANG
;
Woon Yong JUNG
Author Information
1. Department of Pathology, Korea University Guro Hospital, Korea University College of Medicine, Seoul, Korea. pathjwy@gmail.com
- Publication Type:Case Report
- Keywords:
Kidney;
Perivascular epithelioid cell neoplasms;
Pigmentation
- MeSH:
Angiomyolipoma;
Carcinoma, Renal Cell;
Diagnosis, Differential;
Epithelioid Cells;
Female;
Follow-Up Studies;
Humans;
Kidney;
Melanins;
Melanoma;
Perivascular Epithelioid Cell Neoplasms;
Pigmentation;
Prognosis;
Tuberous Sclerosis
- From:Korean Journal of Pathology
2012;46(5):499-502
- CountryRepublic of Korea
- Language:English
-
Abstract:
Heavily pigmented perivascular epithelioid cell tumors (PEComa) are rare, only eight cases of which have been reported. Unlike typical epithelioid angiomyolipoma, most of these tumors have been encountered in female patients without tuberous sclerosis. The long-term prognosis thereof is undetermined. Cytological similarity and heavy melanin pigment make it difficult for pigmented PEComa to be differentiated from pigmented clear cell renal cell carcinoma or malignant melanoma. The immunoprofile of tumor cells, such as human melanoma black-45 expression, as well as the absence or presence of other melanocytic or epithelial markers, are helpful in determining a differential diagnosis. Here we report a case of heavily pigmented PEComa of the right kidney and review the literature describing this tumor. In this case, the immunoprofile and clinical features corresponded well to those described in the literature. Since the prognosis of such disease has not yet been established, close follow-up of this patient was recommended.
