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Focal lesions of the spleen in patients with fever of unknown origin: sonographic patterns and diagnosis.

A review of ultrasonic scans performed for 811 patients admitted at the Abbassia Fever Hospital between 1990 through 1996 for investigation of fever undiagnosed for over 3 weeks revealed 28 cases of focal splenic lesions. They included lymphoma in sixteen cases, tuberculosis in six cases, echinococcal cysts in three, abscess in two, and infarction in one. Final diagnosis was obtained by correlating the ultrasonography and clinical findings, together with pathologic, bacteriologic, serologic and angiographic data.