title: Masticatory muscle pain and progressive mouth opening limitation caused by amyotrophic lateral sclerosis: a case report.
abstract: This article reports a case of masticatory muscle pain and progressive limited mouth opening secondary to amyotrophic lateral sclerosis (ALS), popularly known as Lou Gehrig's disease. The symptoms were first mistaken as those of temporomandibular disorders, before fatty degeneration of all masticatory muscles were discovered on magnetic resonance imaging (MRI). ALS should be considered in the differential diagnosis process when the patient presents with longstanding progressive mouth opening limitation associated with pain. MRI could facilitate the diagnostic process.
authors: Kang Mi
authors: KM
authors: Pang
authors: Ji Woon
authors: JW
authors: Park
mesh_terms: D000690:Amyotrophic Lateral Sclerosis / Q000150:complications* / Q000175:diagnosis; D003937:Diagnosis, Differential; D004576:Electromyography / Q000379:methods; D005157:Facial Pain / Q000209:etiology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008406:Masseter Muscle / Q000503:physiopathology*; D008875:Middle Aged; D009334:Neck Muscles / Q000503:physiopathology; D016059:Range of Motion, Articular / Q000502:physiology*; D013703:Temporal Muscle / Q000503:physiopathology; D013706:Temporomandibular Joint Dysfunction Syndrome / Q000175:diagnosis; D014057:Tomography, X-Ray Computed / Q000379:methods