MASTICATORY MUSCLE SYMPTOMS IN A PATIENT WITH MCARDLES-DISEASE

Myofascial pain dysfunction syndrome is a syndrome characterized by ch ronic preauricular pain and tenderness involving the muscles of mastic ation. The cause is often multifaceted and generally poorly defined. A case of McArdle's disease is discussed in which the patient presented with symptoms consistent with myofascial pain dysfunction syndrome. M cArdle's disease is a rare autosomal recessive glycogen storage disord er in which there is a metabolic myopathy that results in exercise int olerance, muscle pain, and tenderness, and that in this patient gave r ise to chronic symptoms of myofascial pain. Although uncommon, McArdle 's disease should be considered in the diagnosis of patients with symp toms of myofascial pain dysfunction syndrome because the condition has important implications with respect to the patients renal function an d because it can be readily distinguished by simple investigations.