Malignant melanoma clinically mimicking pyogenic granuloma: comparison of clinical evaluation and histopathology

Melanoma Research
Michael MosheMoshe Lapidoth

Abstract

Amelanotic melanomas (AMMs) account for a small proportion of all melanomas. They pose a risk of delayed diagnosis and, consequently, poor prognosis. AMMs may atypically present as a pyogenic granuloma-like lesion. This study sought to investigate the prevalence and clinical and histological features of AMM masquerading as pyogenic granuloma. The database of a tertiary medical center was screened for all patients pathologically diagnosed with melanoma in 2005-2016. Those with a suspected primary (i.e. pre-excision) clinical diagnosis of pyogenic granuloma were identified, and their demographic, clinical, histologic, and outcome data were collected from the medical files. Of 2038 patients diagnosed with melanoma, 10 (∼0.5%) had a pyogenic granuloma-like AMM. The mean±SD age at lesion presentation was 56±18.9 years and the mean time from lesion appearance to diagnosis was 91.5±117.1 months. Nine tumors were located on the skin surface, and one on the oral mucosa. The mean lesion size was 19.6±14.1 mm and the mean Breslow's depth was 6.47±3.1 mm; all tumors presented in the vertical growth phase. Seven (70%) patients had lymph node involvement or metastasis at diagnosis. Two patients died of the disease within 1 year of diagnosis....Continue Reading

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Citations

Mar 21, 2020·The American Journal of Dermatopathology·Yanqing Wang, Ying Guo
Aug 1, 2020·International Journal of Surgical Pathology·Ciro Dantas SoaresJacks Jorge
Jul 27, 2021·Head and Neck Pathology·Shivani P BansalRajiv S Desai
Sep 23, 2021·Plastic and Reconstructive Surgery. Global Open·Helene Sophie ScheerEsther Vögelin

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Methods Mentioned

BETA
biopsy

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