Clavicular Lump Due to Epidermoid Sebaceous Cyst

An epidermoid cyst is the most common benign skin-level lump caused by the accumulation of skin cells beneath the surface. Confirmation is achieved through a clinical physical exam identifying a mobile, superficial nodule that may have a central punctum. Definitive diagnosis is confirmed via histological examination of a tissue sample obtained through fine-needle aspiration or excision.