Document Detail

Recurrent nodules in a periauricular plaque-type blue nevus with fatal outcome.
MedLine Citation:
PMID:  23046118     Owner:  NLM     Status:  Publisher    
Plaque-type blue nevus is a rare variant of blue nevus characterized by grouped nodules displaying histomorphological features of a cellular blue nevus. We report the clinical, histopathologic and immunohistologic features of a patient with recurrent nodules in a periauricular plaque-type blue nevus with malignant transformation and fatal outcome. The nevus was characterized clinically by childhood onset, with slow enlargement during adolescence. At age 16, the patient presented with nodules located retroauricularly. Several surgical excisions with the intent of complete removal of the nodules and the nevus were performed. Histopathological, dermal and subcutaneous proliferations of pigmented melanocytes with melanophages were detected. The nodules showed some cellular atypia and few mitotic figures, (Ki67 estimated <1%). At age 20, the patient developed new nodules retroauricular, with histopathology similar to previous lesions; however, the proliferation rate was higher. A comparative genomic hybridization (CGH) showed chromosomal changes indicative of melanoma. At age 25, the patient developed multiple liver metastases and died after 4 weeks. A sequencing of the tumor DNA revealed a GNAQ Q209P mutation, whereas mutations of GNA11, BRAF, NRAS and cKIT were not detected. This case shows that nodules in plaque-type blue nevus may have malignant potential which may be uncovered by CGH.
Laura Held; Gisela Metzler; Thomas K Eigentler; Ulrike Leiter; Jane Messina; Jeannette Gogel; Juergen Bauer; Claus Garbe
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-18
Journal Detail:
Title:  Journal of cutaneous pathology     Volume:  -     ISSN:  1600-0560     ISO Abbreviation:  J. Cutan. Pathol.     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-10-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0425124     Medline TA:  J Cutan Pathol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 John Wiley & Sons A/S.
Center for Dermatooncology, Department of Dermatology, University Hospital Tuebingen, Tuebingen, Germany.
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