Surgical findings included a mass of fibrous scar and fatty tissue encasing the deep tendon.

Neurological investigations of treated patients reveal only minor neurological signs, such as tremor or brisk deep tendon reflexes.

Neurological examination revealed mild bilateral facial weakness, moderate proximal muscle weakness, and generalized absence of deep tendon reflexes in all limbs.

Deep tendon reflexes in lower limbs were increased in 80% of the cases.