Folliculosebaceous Cystic Hamartoma Mimicking Preauricular Sinus Cyst

Abstract

Folliculosebaceous cystic hamartoma (FSCH) is a rare cutaneous hamartoma that consists of follicular, sebaceous, and mesenchymal elements. These lesions are mostly seen on the central face and scalp of adults and mostly present as single 0.5-1.5 cm papules or exophytic nodules. A 17-year-old female patient presented at our clinic with the complaint of swelling, pain and discharge in front of the left ear, which had been recurrent since childhood. The lesion was clinically suspected to be an infected preauriculer sinus cyst. After the medical treatment, the patient was operated on with a pre-diagnosis of preauricular sinus cyst. Histopathological findings revealed FSCH. To the best of our knowledge, this is the first reported case of FSCH originating from the preauricular region, located subcutaneously.

Regression of Folliculosebaceous Cystic Hamartoma in the Palpebral Conjunctiva After Incisional Biopsy

“…Key Words: Folliculosebaceous cystic hamartoma, incisional biopsy, palpebral conjunctiva, regression F olliculosebaceous cystic hamartoma (FSCH) is a rare, benign, cutaneous hamartoma composed of follicular and sebaceous units. 1 This predominantly develops in the facial skin, scalp, ear, and upper back. 1 A periocular FSCH is very rare, and there had been only 1 reported case of FSCH in the eyelid.…”

“…1 This predominantly develops in the facial skin, scalp, ear, and upper back. 1 A periocular FSCH is very rare, and there had been only 1 reported case of FSCH in the eyelid. 2 As FSCH does not regress spontaneously, complete excision is the treatment of choice.…”

“…Vascular malformations are a result of structural vascular abnormalities, while vascular tumors are characterized by a proliferative endothelial layer. 1,2 The International Society for the Study of Vascular Anomalies (ISSVA) further subclassifies vascular tumors into benign, borderline, and malignant tumors with hemangiomas being classified as benign vascular tumors.…”

“…As FSCH does not regress spontaneously, complete excision is the treatment of choice 1. Here, we report a case of FSCH in the palpebral conjunctiva, which regressed after incisional biopsy.…”

“…Folliculosebaceous cystic hamartoma (FSCH) is a rare, benign, cutaneous hamartoma composed of follicular and sebaceous units 1. This predominantly develops in the facial skin, scalp, ear, and upper back 1.…”