Cock peculiar tumor is
|B||Basal cell carcinoma|
|C||Ulcerated sebaceous cyst|
|D||Squamous cell carcinoma|
a. Cock's peculiar tumouris a sebaceous cystlinked growth. One form of sebaceous cyst is the trichilemmal cyst; these are thought to arise from the hair follicle epithelium and are most commonly found on the scalp.
b. They are multiple but occasionally there can be a proliferating trichilemmal cyst which grows to a large size and ulcerates.
d. The most common sites are the ones where one can find hairs. these are, scalp and scrotum
e. Cylindromas are benign skin appendage tumors. They can be seen in conjunction with spiradenomas and trichoepitheliomas.
f. They most commonly occur on the head and neck as solitary or multiple tumors. Solitary cylindromas occur sporadically and typically are not inherited.
g. Multiple tumors are observed in an autosomal dominantly inherited manner. When nodules enlarge and coalesce on the scalp, they form the distinctive turban tumor feature.
h. Malignant cylindromas are very rare. Malignant transformation may develop within solitary cylindromas, or they may complicate the multiple variant (more common).