Pigmented eccrine poroma occurring on the scalp: Derivation of melanocytes in the tumor.
We describe a man with a pigmented poroma on the scalp mimicking a pigmented melanocytic nevus. Histopathological examination showed that melanocytes were mostly distributed at the periphery of the tumor masses. It is suggested that melanocytes in the tumor masses may have migrated from the adjacent epidermis.
Ohata
Utako
U
Department of Dermatology, Nihon University School of Medicine, Tokyo, Japan.
Hara
Hiroyuki
H
Suzuki
Hiroyuki
H
D018250:Acrospiroma / Q000473:pathology*; D000368:Aged; D002272:Carcinoembryonic Antigen / Q000032:analysis; D002467:Cell Nucleus / Q000648:ultrastructure; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D003937:Diagnosis, Differential; D006258:Head and Neck Neoplasms / Q000473:pathology*; D006801:Humans; D007365:Intercellular Junctions / Q000648:ultrastructure; D008297:Male; D008543:Melanins / Q000032:analysis; D008544:Melanocytes / Q000473:pathology*; D009508:Nevus, Pigmented / Q000175:diagnosis; D012535:Scalp / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*
D002272:Carcinoembryonic Antigen; D008543:Melanins