Infective endocarditis of the tricuspid valve is rare in non-intra-venous drug abusers. Few cases of psoas abscess complicated by tricuspid infective endocarditis have been reported. A 61-year-old man underwent a laminectomy. Three weeks later he developed persistent fever, abdominal pain, back pain and hip pain, weight loss, gradually and abdominal distension. Abdomino-thoracic computed tomographic scan showed a left psoas muscle abscess and cavitary pulmonary lesions suggestive of septic pulmonary emboli. Two dimensional transthoracic echocardiography showed an oscillating mass on the anterior leaflet of the tricuspid valve compatible with a vegetation. There was severe tricuspid regurgitation with right atrial and right ventricular dilatation. Secondary psoas abscess though rare is an important cause of bacteremia and there is a potential of bacteremia progressing to serious systemic infection like tricuspid endocarditis which can be fatal without prompt and appropriate treatment.
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