Pneumococcal pyomyositis secondary to pneumonia.

A case of pneumococcal pyomyositis of the brachial and shoulder region is presented. A bacteremic right lower lobe pneumonia was the source of infection. The spread of pneumococci was presumed to be blood-borne, presenting with cellulitis over the right shoulder region, progressing over 5 days to abscess formation in the right biceps muscle and right shoulder joint despite adequate antibiotic treatment.