Inflammatory pseudotumor is a benign lesion mainly developed in respiratory system. It is difficult to distinguish from malignant lesions, so surgical biopsy is necessary. Of the extrarespiratory system, the inflammatory pseusotumor is rarely developed in the spleen, and first reported by Cotelingam and Jaffe in 1984. We report a case of the inflammatory pseudotumor in the spleen. A 59-years old woman has visited with a splenic mass detected on routine check. She denied the history of abdominal trauma or other diseases except urinary stone and had no subjective symptoms. Tumor markers were all within normal limits. For the differential diagnosis of the splenic mass, splenectomy was done. Grossly, 6x5x4.5 cm sized yellow, hard, well-demarcated mass was seen, and microscopically, prominent fibrosis and collagenation and partial infiltration of plasma cells and neutrophils were found. And the postoperative course was uneventable.
Biopsy ; Collagen ; Diagnosis, Differential ; Female ; Fibrosis ; Granuloma, Plasma Cell* ; Humans ; Middle Aged ; Neutrophils ; Plasma Cells ; Respiratory System ; Spleen* ; Splenectomy ; Biomarkers, Tumor ; Urinary Calculi