MERRF syndrome (Myoclonic Epilepsy with Ragged Red Fibres) presenting with cervicothoracic lipomatosis.

INTRODUCTION: Patients with MERRF syndrome (Myoclonic Epilepsy with Ragged Red Fibres) usually present with encephalomyopathy. However, progressive, recurrent cervicothoracic lipomatosis may be rarely observed.

CASE REPORT: The authors report 4 cases of MERRF syndrome associated with lipomatosis. In 3 patients, the diagnosis of MERRF syndrome was established on the basis of the clinical features of the lipomas and clinical interview revealing a personal or family history of lipomas and myopathy.

DISCUSSION: In the presence of extensive spinal lipomatosis, the presence of other clinical signs of MERRF syndrome in the patient or the patient's family must be investigated. A diagnosis of MERRF syndrome can guide appropriate genetic counselling.