title: Concurrent Pilomatrix Carcinoma and Diffuse Large B-Cell Lymphoma.
abstract: Pilomatrix carcinoma is a rare cutaneous tumor derived from follicular matrix cells. It may arise de novo or from a malignant transformation of a pilomatrixoma. The latter process has been associated with impaired immune system surveillance of the host caused by UV radiation or the onset of an underlying malignant neoplasm. We report a case of a 58-year-old man presenting with a long-standing pilomatrix carcinoma on the inner right leg after 10 years of repeated curettage of the lesion, concurrent with a high-grade B-cell lymphoma on the same extremity. We describe a rare association which highlights the necessity of close follow-up of patients with long-standing malignant skin tumors.
authors.affiliation: Hospital 12 de Octubre, Madrid, Spain.
authors.forename: Luis
authors.initials: L
authors.lastname: Parra
authors.affiliation: Plastic Surgery Department, Hospital 12 de Octubre, Madrid, Spain.
authors.forename: Marcos
authors.initials: M
authors.lastname: Martin
authors.affiliation: Pathology Department, Hospital 12 de Octubre, Madrid, Spain.
authors.forename: María
authors.initials: M
authors.lastname: Garrido
authors.affiliation: Hospital 12 de Octubre, Madrid, Spain.
authors.forename: Jose María
authors.initials: JM
authors.lastname: Pedraza
authors.affiliation: Hospital 12 de Octubre, Madrid, Spain.
authors.forename: Javier
authors.initials: J
authors.lastname: Palazon
authors.affiliation: Hospital 12 de Octubre, Madrid, Spain.
authors.forename: Manuel
authors.initials: M
authors.lastname: Robustillo
authors.affiliation: Hospital 12 de Octubre, Madrid, Spain.
authors.forename: Daniel
authors.initials: D
authors.lastname: Grandes
authors.affiliation: Plastic Surgery Department, Hospital 12 de Octubre, Madrid, Spain.
authors.forename: Emilio
authors.initials: E
authors.lastname: Lagaron
keywords: Long-standing skin lesion; Lymphomas; Pilomatrix carcinoma; Pilomatrixoma; Skin tumors