Numbness in thighs, hips and buttocks Proximal diabetic neuropathy is also known as diabetic polyradiculopathy or diabetic amylotrophy.It is a complication if diabetes mellitus that affects the nerves that supply the thighs, hips, buttocks and/or lower legs. It can also affect the abdominal and chest area.It is caused by damage to nerves of lumbosacral plexus.The lumbosacral plexus is a network of nerve fibers, derived from the roots of lumbar and sacral spinal nerves that branch out to form the nerves supplying the lower limb.Proximal diabetic neuropathy is most commonly seen people with Type II diabetics. It is less common than