Locally extensive follicular hamartomas with concurrent follicular cysts and dermoid cysts on the head of a dog

Abstract A 5‐month‐old, male intact Australian shepherd dog was presented with nodular lesions affecting the dorsal head. A locally diffuse form of follicular hamartomas, with concurrent dermoid cysts and follicular cysts, was diagnosed by histopathological examination. Complete surgical excision of the affected skin and closure with a subdermal plexus advancement flap led to long‐term resolution.