Sir.—We describe a child with paralysis of the arm caused by septic arthritis and brachial plexopathy, similar to that reported by Dr Clay in the article "Osteomyelitis as a Cause of Brachial Plexus Neuropathy" (Journal 1982; 136:1054-1056).
Report of a Case.—A 1-month-old female infant with tetralogy of Fallot underwent anastomosis of the right subclavian artery to the pulmonary artery. She ceased to move her right arm ten days later. She was referred to us one week after onset of paralysis. Her temperature was 37 °C. There was no spontaneous movement at the right shoulder or elbow and only feeble motion present in the hand. The other extremities had normal strength. The right biceps reflex was depressed. The ESR was 59 mm/hr. An electromyogram showed 2 + fibrillations and positive waves in muscles innervated by the right ulnar and median nerves. Conduction in the right ulnar nerve was slow (23