An unusual causeofthoracic mass

previously well10yearoldboypresented withscoliosis, amassinthechest wail, anda pleural effusion. Chestradiography showed thetriad ofchronic consolidation, pleural effusion, andribperiostitis. Investigations confirmed thoracic actinomycosis. Tissue spread wasevaluated bycomputed tomo- graphy. Itwassuccessfully treated withben- zylpenicillin, whichwaslater replaced byclin- damycin. ..e~~~~~~~~~~~~~~~~~~~~~~...