MELANOTIC SARCOMAS RESULTING FROM IRRITATION OF PIGMENTED NEVI
نویسندگان
چکیده
منابع مشابه
The physiology of pigmented nevi.
Melanocytes are pigment-producing cells derived from the neural crest. These specialized exocrine cells produce melanin, which is packaged and dispersed to neighboring keratinocytes in organelles called melanosomes. Within the melanocyte, tyrosine is converted to dopa, and then dopaquinone via the bifunctional enzyme tyrosinase. Dopaquinone is oxidized further to form the pigment melanin. Each ...
متن کاملOral Melanotic Nevi: a Case Report and Review of Literature
Oral melanotic nevi are uncommon oral lesions causing focal pigmentation. Melanotic nevi are benign melanocytic tumours originating from defective melanoblasts of the neural crest. Clinically, it is an asymptomatic, flat or slightly elevated lesion of brown or brown-black color. It is usually located on the palate and buccal mucosa and rarely on the gingiva and lips. Based on histological crite...
متن کاملDifferentiation of pigmented Spitz nevi and Reed nevi by integration of dermatopathologic and dermatoscopic findings
BACKGROUND It is unclear whether pigmented Spitz and Reed nevi are distinct morphologic entities or part of the spectrum of Spitz nevi. METHODS In a retrospective observational study we analyzed dermatopathologic slides of 22 cases with clinical and dermatoscopic features indicative of pigmented Spitz or Reed nevus in a blinded fashion according to predefined criteria and subsequently correla...
متن کاملDevelopment of multiple pigmented nevi within segmental nevus depigmentosus.
Nevus depigmentosus is a stable and well-circumscribed congenital hypomelanosis that may be in an isolated, dermatomal or systemic form. An 18-yr-old Korean man with segmental nevus depigmentosus developed multiple pigmented nevi which were present only within the confines of the leukoderma. Histologic and electron microscopic studies rendered a diagnosis of nevus depigmentosus with dysplastic ...
متن کاملDermoscopy of pigmented Spitz and Reed nevi: the starburst pattern.
Richard Marchell, MD; Ashfaq A. Marghoob, MD; Ralph P. Braun, MD; Giuseppe Argenziano, MD; Departments of Dermatology, Stony Brook University Hospital, Stony Brook, NY (Dr Marchell), University Hospital Geneva, Geneva, Switzerland (Dr Braun), and Second University of Naples, Naples, Italy (Dr Argenziano); and the Dermatology Service, Memorial Sloan-Kettering Cancer Center, New York, NY (Dr Marg...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: JAMA: The Journal of the American Medical Association
سال: 1913
ISSN: 0098-7484
DOI: 10.1001/jama.1913.04340050011003