1. Lack EE Extraadrenal paraganglia, paragangliomas, and other features of sympatho-adrenal paragangliomas. In: Silverberg SG, Sobin LH editors. AFIP atlas of tumor pathology. Tumors of adrenal glands and extaadrenal paraganglia. 4th series. American Registry of Pathology: Washington DC; pp. 288-93, 2007
2. Yoshimi N, Tanaka T, Hara A, Bunai Y, Kato K, Mori H. Extra-adrenal pheochromocytoma–ganglioneuroma. A case report. Pathol Res Pract 188:1098-100, 1992
3. Linnoila RI, Keiser HR, Steinberg SM, Lack EE. Histopathology of benign versus malignant sympathoadrenal paragangliomas: clinicopathologic study of 120 cases including unusual histologic features. Hum Pathol 21:1168-80, 1990.
4. Tischler AS. Divergent differentiation in neuroendocrine tumors of the adrenal gland. Semin Diagn Pathol 17: 120-6, 2000
5. Min K-W, Clemens A, Bell J, Dick H. Malignant peripheral nerve sheath tumor and pheochromocytoma. A composite tumor of adrenal. Arch Pathol Lab Med 112:266-70, 1998