Cystic swellings of the sebaceous gland occurring due to blockage of their ducts, which opens commonly into the hair follicles, are
called as sebaceous cysts. They become distended by their own secretary materials i.e. sebum (yellowish cheesy pultaceous material)
secondary to blockage. These are commonly seen on the scalp, face and scrotal areas containing dense hair follicles and rarely seen
on the breast, palm or sole. Sebaceous cyst occurrence and huge size in the breast is very rare and liable to develop complications
like malignant transformation. It poses a clinical dilemma to distinguish it from other benign breast conditions. Here we are
reporting an unusual case of 50year female presented with complaints of lump in the left breast for 20 years with no associated
complaints.
Keywords: Sebaceous cyst, breast lump, punctum, sebum