title: Tumor with the features of both squamous cell carcinoma and melanoma (melanocarcinoma).
abstract: Combined tumors of malignant melanoma (MM) and squamous cell carcinoma (SCC) are extremely rare and have unknown biological potential. Different theories of their development, including collision and dual/divergent differentiation, are proposed. Although some observations suggest an indolent course for such tumors, a case of MM metastasis was reported in a patient who initially presented with a combined MM-SCC tumor. Re-excisions of such tumors may show MM in situ and should be treated accordingly. Herein we present another case of a combined MM-SCC tumor in a 78 male patient with lentigo maligna seen after complete re-excision of the tumor.
authors.affiliation: New York College of Osteopathic Medicine, NY, USA.
authors.forename: Elise
authors.initials: E
authors.lastname: Kochoumian
authors.affiliation: Ackerman Academy of Dermatopathology, NY, USA.
authors.forename: Viktoryia
authors.initials: V
authors.lastname: Kazlouskaya
authors.affiliation: Mayo Clinic Arizona, Scottsdale, AZ, USA.
authors.forename: Aaron
authors.initials: A
authors.lastname: Mangold
authors.affiliation: New York College of Osteopathic Medicine, NY, USA.
authors.forename: Karan
authors.initials: K
authors.lastname: Lal
authors.affiliation: Ackerman Academy of Dermatopathology, NY, USA.
authors.forename: Sandra
authors.initials: S
authors.lastname: Maia-Cohen
authors.affiliation: Ackerman Academy of Dermatopathology, NY, USA.
authors.forename: Dirk M
authors.initials: DM
authors.lastname: Elston
keywords: Melanoma; skin neoplasms; squamous cell carcinoma