No abstract

No abstract

Necrobiosis lipoidica (NL) is a chronic granulomatous idiopathic disorder. It usually presents as yellow-brown, atrophic, telangiectatic plaques with an elevated violaceous rim, typically in the pretibial region of both extremities with and without ulceration [1, 2]. There are few reported cases of childhood-onset NL in atypical locations. We report a case of type 1 diabetic 13-year-old girl who developed yellow atrophic plaque with telangiectasia on the extensor aspect of her upper arm.

This work was carried out in collaboration between all authors. Author MSSAD designed the study, wrote the protocol and supervised the work. Author MMAA carried out all laboratories work and performed the statistical analysis. Author MAMA managed the analyses of the study and wrote the first draft of the manuscript. Author MAA managed the literature searches and edited the manuscript.

<b><i>Introduction:</i></b> Trichilemmomas are a form of benign adnexal neoplasm with differentiation toward the follicular outer sheath. Nevus sebaceous (NS) of Jadassohn is a congenital malformation characterized as a nonhereditary hamartoma of the adnexal structures of the skin, mainly the pilosebaceous unit. NS represents a fertile field for the development of secondary adnexal neoplasms, commonly benign but occasionally malignant. To our knowledge, one case of a pigmented desmoplastic trichilemmoma (DT) has been reported in the English literature. <b><i>Case Presentation:</i></b> We report a case of a 36-year-old male with pigmented DT that developed on long-standing congenital NS, mimicking pigmented basal cell carcinoma (BCC), which was successfully excised with 4-mm margins. <b><i>Conclusion:</i></b> Pigmented DT may mimic pigmented BCC on clinical and dermatoscopic examination; therefore, histological evaluation is always recommended to confirm the diagnosis.

No abstract

No abstract

No abstract