Most of the incidentalomas are
An incidentaloma is an adrenal mass, detected incidentally by imaging studies conducted for other reasons, not known previously to have been present or causing symptomsMore than 75% are non-functioning adenomas but Cushing's adenomas, phaeochromocytomas, metastases, adrenocoical carcinomas and Conn's tumours can all be found this wayRef: Bailey and Love 27e pg: 839
Non-functioning adenoma
Adrenocoical carcinoma
Adrenal metastasis
Pheochromocytoma
Endocrinology and breast