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). ...

Rugosities on dermal bones of the skull have often been used to support inferences regarding unpreserved cutaneous appendages in extinct animals (e.g., horns). Such associations often seem obvious when examined in extant osteological specimens, where the conformation of epidermal appendages remains intact, but inferences regarding the type and morphology of unpreserved cutaneous appendages are ...

Cutaneous horns are conical, circumscribed protuberances formed by densely layered keratin. These lesions originate from basal keratinocytes and may manifest as benign, premalignant, or malignant cutaneous pathology in chronically sun-damaged areas. Complete surgical excision with histologic examination is needed for potential malignancy. In this report, we describe two elderly women presenting...

Purpose To report a case of seborrheic keratosis of the inner canthus presenting as cutaneous horn. Observation A 67-year-old Asian male presented with a rod-shaped, pedunculated mass on his inner canthus. The mass grew rapidly and within 2 months measured 3.0 cm in length and 0.5 cm in diameter. It was completely excised and submitted for microscopic examination. The specimen consisted of a ...

Corresponding author: Che-Hao Hsu, Department of Dermatology, Cathay General Hospital, 280 Jen-Ai Rd., Sec. 4, Taipei, Taiwan TEL: 886-2-27082121 FAX: 886-2-27074949 E-mail: [email protected] Funding source: none Confl ict of interest: none declared CASE REPORT A 45-year-old man presented with an asymptomatic, slowly growing, keratotic nodule on his left fl ank for one year. Physical examin...

Received May 18, 2010, Revised June 10, 2010, Accepted for publication June 10, 2010 Corresponding author: Eun-So Lee, M.D., Department of Dermatology, Ajou University School of Medicine, San 5 Wonchon-dong, Yeongtong-gu, Suwon 443-721, Korea. Tel: 82-31-219-5190, Fax: 82-31219-5189, E-mail: [email protected] Fig. 1. Hyperkeratotic projection on the umbilicated papule in the posterior auricular ar...

A cutaneous horn is a rare, hyperkeratotic, projecting lesion that can be mostly found in sun-exposed areas of the skin. The base lesions reveal an underlying malignancy. They also associated with several benign or pre-malignant dermatologic conditions. biopsy and histopathological analysis are needed to confirm diagnosis. Management depends on disease; however, surgical excision preferred trea...

BACKGROUND Cutaneous horn is a keratotic, conical and circumscribed lesion that can hide both benign or malignant lesions. OBJECTIVE To identify,from a histopathological point of view, the main clinical dermatoses that are presented ,from a clinical point of view, as cutaneous horn. METHODS RETROSPECTIVE HISTOPATHOLOGICAL STUDY OF 222 CASES OF CUTANEOUS HORNS THAT WERE CLASSIFIED AS SUCH BY...

Cutaneous horns are relatively rare benign tumors which occur most frequently on sun exposed skin and develop on various types of underlying skin lesions: benign, premalignant and malignant. The treatment of choice consists in the surgical excision of the lesion to healthy tissue. The histopathological examination is mandatory in order to establish the nature of the lesion, on which the cutaneo...