IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-7-4-14983 Original Research Paper A Rare Presentation Of Pilar Cyst On Neck - A Case Report. D.Patkar Dr. April 2018 7 4 01 02 ABSTRACT

Cutaneous cysts are frequent benign head and neck lesions.Trichilemmal or pilar cysts are common intradermal or subcutaneous cysts, occurring in around 5–10% of the population.1Trichilemmal cysts occur most preferentially in areas with dense hair follicle concentrations; therefore, 90% occur on the scalp, but may be seen infrequently on the face, neck, trunk, and extremities. Trichilemmal cysts commonly manifest as skin–colored, smooth, mobile, firm, and well–circumscribed nodules. In 2% of trichilemmal cysts, wherein single or multiple foci of proliferating cells lead to tumors, are called proliferating trichilemmal cysts. Proliferating trichilemmal cysts are gradually enlarging (up to 25 cm in diameter), exophytic nodules which occasionally ulcerate. Although biologically benign tumors, they may be locally aggressive. Recurrence and metastases have been observed in literature, with rare malignant transformation. Thereby , we present a case of trichilemmal cyst reported to our department with a rare occurrence on neck.