Adnexal and skin appendage neoplasms is a group of tumors.
An example is hidrocystoma.
Eccrine: Syringoma · Hidrocystoma · Malignant acrospiroma
tract: Linitis plastica · Familial adenomatous polyposis
pancreas (Insulinoma, Glucagonoma, Gastrinoma, VIPoma, Somatostatinoma)