Box 1.

Aetiology by anatomy

Cortical tumours

  • Adenoma

  • Nodular hyperplasia

  • Adrenocortical carcinoma

Medullary tumours

  • Phaeochromocytoma

  • Ganglioneuroma

  • Ganglioneuroblastoma

Other

  • Myelolipoma

  • Lipoma

  • Lymphoma

  • Other malignancies

General

  • Adrenal cyst

  • Haematoma

  • Infection/granuloma

  • Metastasis

  • Pseudoadrenal mass