title: Malignant proliferating trichilemmal tumour: a case report.
abstract: An 86-year-old man presented with a painless, pea-sized growth over the left angle of his jaw, which had been gradually enlarging over two years. A clinical diagnosis of pilar cyst was made. Histopathological examination of the mass revealed a malignant proliferating trichilemmal tumour. During follow-up 4 months later, a palpable small upper jugular lymph node was noted at the left side of the neck. Biopsy revealed a metastatic malignant trichilemmal tumour. This case illustrates a rare malignant tumour which is a challenge to clinical diagnosis.
authors.affiliation: Department of Pathology, Hospital Sultanah Aminah Johor Baru.
authors.forename: S H
authors.initials: SH
authors.lastname: Fernandez
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002471:Cell Transformation, Neoplastic; D004814:Epidermal Cyst / Q000473:pathology / Q000601:surgery; D018859:Hair Follicle / Q000473:pathology*; D006801:Humans; D007568:Jaw / Q000473:pathology; D008198:Lymph Nodes / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D012878:Skin Neoplasms / Q000473:pathology* / Q000601:surgery