RESUMO
We report a case of a young individual who presented with fever and swelling of right upper and lower limbs for 3 weeks. Subsequently he developed shortness of breath and decreased urine output and had to be mechanically ventilated. Ultrasound screening of the lower limb had shown deep venous thrombosis (DVT) and thus the diagnosis of pulmonary thromboembolism (PTE) seemed probable. However the workup for PTE was negative and patient's fever continued and his condition deteriorated. Evaluation for an infective locus led to the diagnosis of pyomyositis and DVT appeared to have developed secondary to the muscle inflammation as a part of Reverse Lemierre's syndrome. Thus this case highlights the importance of considering this diagnosis in a similar setting and not to ascribe every case of respiratory failure in a background of DVT to be due to PTE.