[Trichilemmal horn: a new case and review of the literature].
Trichilemmal horn, or trichilemmal keratosis, is an uncommon benign neoplasm of follicular lineage with trichilemmal differentiation. The essential characteristics of this tumor are its clinical presentation in the form of a cutaneous horn with trichilemmal keratinization apparent in the histology study (with a hyperplastic epithelium giving rise to dense, orthokeratotic eosinophilic keratin). We present a new case of this type of tumor in an 82-year-old woman who developed a solitary lesion on her scalp after surgical removal of a trichilemmal cyst. On the basis of the pathology report, the tumor was diagnosed as trichilemmal horn. We review the 33 reports of this tumor in the literature to date.
Haro
R
R
Servicio de Dermatología, Fundación Jiménez Díaz, Madrid, España. rosharam@yahoo.es
González-Guerra
E
E
Fariña
M C
MC
Martín-Moreno
L
L
Requena
L
L
D000369:Aged, 80 and over; D004814:Epidermal Cyst / Q000150:complications*; D005260:Female; D006801:Humans; D007633:Keratins / Q000032:analysis; D007642:Keratosis / Q000175:diagnosis* / Q000473:pathology; D011183:Postoperative Complications / Q000175:diagnosis / Q000473:pathology; D012536:Scalp Dermatoses / Q000175:diagnosis* / Q000473:pathology
D007633:Keratins