We present the case number 22 of prostatic melanosis in the literature reports. Prostatic melanosis is a very rare, benign lesion characterized by the presence of melanin both in the epithelium of the prostate gland as well as in the stromal dendritic cells, requiring no additional treatment. It constitutes the melanocytic lesions of the prostate together with blue nevus and melanoma.

BACKGROUND/AIMS The authors investigated the expression of S100A1, S100A6, S100B, MelanA, and CEA in conjunctival naevi, primary acquired melanosis (PAM), conjunctival melanoma, and uveal melanoma in order to assess their potential usefulness in the pathological differential diagnosis of these entities. METHODS Paraffin embedded sections of 18 conjunctival naevi, 14 PAM, 16 conjunctival melan...

Benign pigmented skin lesions are very common in children and can be generally classified into congenital or acquired nevi. Congenital nevi can be small, medium or large. Large nevi are usually associated with a higher risk of malignant transformation into melanoma. Acquired melanocytic nevi can be classified into typical melanocytic nevi, clonal nevi, or halo nevi. Cytological atypia can be ob...

BACKGROUND Melanosis of the uterine cervix is a rare, benign, melanocytic lesion of the cervix. A review of the English-language literature revealed 11 other reported cases. CASE A 52-year-old African American woman who presented for evaluation and treatment of menorrhagia was found to have an irregular, pigmented cervical lesion. The ectocervical biopsy showed melanosis characterized by hype...

The presence of both laminin and type IV collagen was sought at the dermo-epidermal junction and in the dermis adjacent to benign melanocytic naevi of the junctional, compound, and intradermal types; dysplastic naevi; and both primary and secondary melanoma. In all, 154 lesions were studied, using antibodies to laminin and type IV collagen and an indirect immunoperoxidase technique. The stainin...

OBJECTIVES To identify in vivo microscopic substrates of the dermoscopic patterns of melanocytic lesions and to correlate them with histopathologic features. DESIGN Before excision, lesion areas that showed characteristic dermoscopic patterns were imaged by dermoscopy and confocal microscopy and directly correlated with histopathologic features. SETTING Departments of Dermatology of the Uni...

BACKGROUND Differential diagnosis of melanoma from melanocytic nevi is often not straightforward. Thus, a growing interest has developed in the last decade in the automated analysis of digitized images obtained by epiluminescence microscopy techniques to assist clinicians in differentiating early melanoma from benign skin lesions. PURPOSE The aim of this study was to evaluate diagnostic accur...

PURPOSE To compare the histologic, morphometric and nuclear DNA content of a group of benign and malignant melanocytic lesions of the iris. METHODS Forty-four surgically excised melanocytic lesions of the iris were histologically classified as nevus or melanoma. Morphometric analysis using a digital filar micrometer (LaSICO 1602N-10 and 5-4A) measured the mean size of the 10 largest nucleoli,...

Birthmarks in newborns are common sources of parental concern. Although most treatment recommendations are based on expert opinion, limited evidence exists to guide management of these conditions. Large congenital melanocytic nevi require evaluation for removal, whereas smaller nevi may be observed for malignant changes. With few exceptions, benign birthmarks (e.g., dermal melanosis, hemangioma...

Melanocytic nevi represent a benign neoplastic proliferation of melanocytes. The level of vascular endothelial growth factor expression in these proliferations is low in most cases; whereas an increased expression of this factor may be an indicator of pre-neoplastic changes in melanocyte lesions. We performed a semi-quantitative assessment of the level of vascular endothelial growth factor expr...