A benign or malignant neuroendocrine neoplasm of the sympathetic nervous system that secretes catecholamines. It arises from the chromaffin cells of the adrenal medulla. Clinical presentation includes headaches, palpitations, chest and abdominal pain, hypertension, fever, and tremor. Microscopically, a characteristic nesting (zellballen) growth pattern is usually seen. Other growth patterns including trabecular pattern may also be present. The disease is MONDO_0004974 (adrenal gland pheochromocytoma). Also known as: Intraadrenal paraganglioma, PCC, adrenal gland Chromaffinoma, adrenal gland chromaffin paraganglioma, adrenal gland paraganglioma, adrenal medullary paraganglioma, adrenal medullary pheochromocytoma, adrenal pheochromocytoma.