Animal-type melanoma - tumor cell invasion of dermal lymphatics and molecular identification of lymph node metastasis

"Animal-Type Melanoma/Pigmented Epithelioid Melanocytoma": History and Features of a Controversial Entity

Animal-type melanoma (ATM) was first described in the literature by Levene in 1979 in relation to a patient with a characteristic clinical presentation, and only later, rare and anecdotal case series have tried to shed light on an entity that has undergone several nosographic classification changes, and which, since 2018, is classified under the term "pigmented epithelioid melanocytoma". Here, we conduct a brief review of the current literature on ATM and present a new clinical case with histopathological, immunophenotypic, and molecular investigations.