Accessory obturator nerves with bilateral pseudoganglia in man.

During the routine dissection of the pelvis and anterior thigh of an adult female cadaver, accessory obturator nerves were found bilaterally with pseudoganglia. In addition, each accessory obturator nerve rejoined the anterior division of the normally placed obturator nerves after traveling superficial to the pubic bones. Histological sections revealed primarily normal nerve with no neuronal cell bodies within these focal areas of enlargement. No inflammatory response was noted in these histologically normal peripheral nerve structures. Further gross anatomy including other peripheral nerves was found to be normal. Peripheral nerve "ganglia" are found in the literature with little focus on histology. Our case report represents to our knowledge, the first report of a pseudoganglion in association with an accessory obturator nerve.