title: Multiple tumour presentation of trichilemmal carcinoma.
abstract: Trichilemmal carcinoma is a rare skin tumour occurring in the sun-exposed areas of the elderly. It originates from the external root sheath of the hair follicle and is the malignant form of the trichilemmoma. Clinically, it may be mistaken for a squamous cell carcinoma, basal cell carcinoma, nodular melanoma or keratoacanthoma. It is distinct from the proliferating trichilemmal tumour. Trichilemmal carcinoma is usually a solitary lesion and an extensive literature search revealed no previously reported cases of multiple tumour presentation. We describe a case of trichilemmal carcinoma arising from three distinct sites in the same patient and discuss the differential diagnoses, histological features and probable aetiology of this rare tumour.
authors.affiliation: Division of Plastic Surgery, Department of Surgery, National University Hospital, Singapore.
authors.forename: K O
authors.initials: KO
authors.lastname: Chan
authors.forename: I J
authors.initials: IJ
authors.lastname: Lim
authors.forename: H G
authors.initials: HG
authors.lastname: Baladas
authors.forename: W T
authors.initials: WT
authors.lastname: Tan
mesh_terms: D000368:Aged; D002280:Basal Cell Carcinoma / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D012878:Skin Neoplasms / Q000473:pathology*