RESUMO
A 60-year-old male presented to the emergency room with complaints of back pain overlying the left lumbar area and ipsilateral thigh numbness. The left erector spinae musculature was rigid, tense, and painful to palpation. An elevated serum creatine kinase was identified, and a computed tomography scan showed evidence of left paraspinal musculature congestion. Past medical/surgical history was significant for McArdle's disease and bilateral forearm fasciotomies. The patient underwent lumbosacral fasciotomy with no obvious myonecrosis. The patient was discharged home after skin closure and has since been seen in clinic with no residual pain or change in baseline functional status. This case may represent the first reported atraumatic exertional lumbar compartment syndrome in a patient with McArdle's disease. Prompt operative intervention was effective in this case of acute atraumatic paraspinal compartment syndrome and resulted in an excellent functional outcome.