A benign neoplasm that involves the adrenal gland. The disease is benign neoplasm of adrenal gland (MONDO_0021511, a Monarch Disease Ontology id). Also known as: adrenal gland benign neoplasm, benign adrenal gland neoplasm, benign adrenal gland tumor, benign adrenal gland tumour, benign adrenal neoplasm, benign adrenal tumor, benign adrenal tumour, benign neoplasm of the adrenal gland.