[Late diagnosed cervical myelomalesia in a case of Fahr disease experiencing a neuropathic pain].

Fahr disease is an idiopathic disorder characterized with deposition of calcium and a few other minerals in basal ganglia, cerebellum and subcortical brain area. A 51 years old female with the complaints of pain, numbness, tingling and weakness in both upper extremities for six months was referred to our electromyography laboratory with a suspicion of carpal tunnel syndrome. She got the diagnosis of Fahr disease upon the investigations for the convulsions that she experienced ten years ago. Beside, she had a generalized anxiety disoder. Neurological examination revealed mild to moderate weakness in flexion and extension of forearm, and extension of hand on both sides. She described dysesthesia on C6 & C7 dermatomes, bilaterally. Symmetric calsifications on both cerebellar hemispheres and basala ganglia were present on cranial CT. Median and ulnar nerve conduction studies were normal on both sides. Concentric needle electromyography revealed chronic neurogenic changes on the morphology of motor unit potentials recorded from the muscles of C6 & C7, bilaterally. Cervical magnetic resonance imaging revealed discopathies on C4-5, C5-6 and C6-7 levels causing myelomalacia. Neuropathic pain, paresthesia or muscle weakness on upper extremities are rare in Fahr disease. Presented case got the diagnosis of cervical discopathies in late as those findings were supposed to be related with Fahr disease. Therefore, clinicians should be aware of common findings occured during the course of this disease, and consider the possible coincidental pathologies when the atypical neurological deficits are observed in these patients.