Dermoid cyst of the caecum.

Dermoid cysts of the caecum are rare and only four cases have been reported in the literature. They are sequestration cysts and are lined by squamous epithelium with skin appendages. Aetiologically these cysts may represent squamous metaplasia of enterogenous cysts or sequestration cysts due to epidermal inclusion at the time of closure of the neural groove.