||Epidermal cysts are slow growing, round, firm intradermal or subcutaneous tumors that arise most commonly from the infundibula of hair follicles. Clinically these cysts appear as smooth, round, doughy, mobile intracutaneous masses. There is often a surface opening or communication. The overlying skin is frequently yellowish-white in color, due to the mass of white keratin contained within the cyst.
The favored sites for the formation of epidermal cysts affecting the ear are the postauricular sulcus, and the medial aspect of the lobule at its junction with the face.
There is a large, solitary, postauricular epidermal cyst, which displays a characteristic yellowish-white discoloration.