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accessory adrenal tissue

Wednesday 3 June 2009

Definition: Nests of adrenal tissue located away from adrenal gland.

Accessory adrenal tissue is due to migration of adrenocortical primordial cells with gonads, usually without accompanying medullary tissue. Cases near celiac ganglion may also contain medullary tissue. It may undergo same disease processes as ordinary adrenal glandular tissue.

Localization

- retroperitoneal space along urogenital ridge
- beyond renal capsule in upper pole
- hilum of ovary or testes
- along course of spermatic cord

It may be accompanied by malformation of epididymis.

It may be fused with liver or kidney and surrounded by a common capsule.

Differential diagnosis

- metastatic renal cell carcinoma
- other clear cell tumors