Genetic Abnormalities in Large to Giant Congenital Nevi: Beyond NRAS Mutations
نویسندگان
چکیده
منابع مشابه
Congenital giant melanocytic nevi
Nevi are common skin tumors caused by abnormal overgrowth of cells from the epidermal and dermal layers of the skin. Most nevi are benign, but some pre-cancerous nevi must be monitored or removed. The giant congenital nevus is greater than 10 cm in size, pigmented and often hairy. Between 4% and 6% of these lesions will develop into a malignant melanoma. Since approximately 50% of the melanoma ...
متن کاملBRAF, NRAS, and GNAQ Mutations in Conjunctival Melanocytic Nevi.
Purpose To evaluate BRAF, NRAS, and GNAQ mutations in surgical specimens of common and blue conjunctival melanocytic nevi. Methods Surgical specimens from 25 conjunctival melanocytic nevi (23 common and 2 blue) of 25 patients were evaluated. All common nevi were analyzed immunohistochemically for the expression of BRAF V600E or NRAS Q61R. One lesion with negative immunoreactivity and for all ...
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According to the prevailing multistep model of melanoma development, oncogenic BRAF or NRAS mutations are crucial initial events in melanoma development. It is not known whether melanocytic nevi that are found in association with a melanoma are more likely to carry BRAF or NRAS mutations than uninvolved nevi. By laser microdissection we were able to selectively dissect and genotype cells either...
متن کاملGiant congenital melanocytic nevi: a case report.
Congenital melanocytic naevi which are formed by the overgrowth of melanocytes, are present at birth, which are called as bathing trunk, coat-sleeve or stocking naevi, which are commonly found over the back and the thigh areas . The giant congenital naevi of sizes which are greater than 20 cm are pigmented and are often hairy. The risk of malignant melanoma for the giant naevi is approximately ...
متن کاملGiant Congenital Melanocytic Nevi and Neurocutaneous Melanosis
Introduction. The major medical concern with giant congenital melanocytic nevi CMN is high risk of developing cutaneous melanoma, leptomeningeal melanoma, and neurocutaneous melanocytosis. Case Report. A 30-year-old woman with a giant congenital melanocytic nevus covering nearly the entire right thoracodorsal region and multiple disseminated melanocytic nevi presented with neurological symptoms...
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ژورنال
عنوان ژورنال: Journal of Investigative Dermatology
سال: 2019
ISSN: 0022-202X
DOI: 10.1016/j.jid.2018.07.045