[Clinical study of three myelodysplastic syndrome (MDS) patients with BOOP-like pulmonary disease].

Three cases of myelodysplastic syndrome (MDS) associated with BOOP-like pulmonary disease were reported. They were diagnosed from transbronchial biopsies and clinical features. In two cases, chest radiographs showed ground glass opacities or air space consolidation in both lung fields, and air space consolidation in the right lower lobe in the other case. BALF showed a marked increase of lymphocytes in one case, and organizing pneumonia and alveolitis, and alveolar spaces filled with foamy macrophages were identified histologically. Although no steroid therapy was employed, all three cases improved. However, one patient suffered a relapse 6 months later and thereafter did not respond to corticosteroid therapy.

[A case of fibrous histiocytoma of the appendix with twisted stalk].

A 74-year-old man consulted this hospital with the chief complaint of lower right abdominal pain on February 13, 1998. He was hospitalized, subjected to abdominalechography and CT, and diagnosed as having subileus caused by an intraperitoneal tumor. Surgery was performed on February 25, 1998. When the abdomen was incised, a chicken egg-sized tumor at the end of theappendix were found. In addition, the stalk of the appendix was twisted. Appendectomy was therefore performed. Upon histopathological examination, it was found that the submucosal tumor originated at the end of the appendix, and proliferation of spindle-shaped fibroblast-like cells and histocytic oval cells was observed in the tumor. Since various histiocyte markers were positive upon immunohistological examination, the tumor was considered to be of histiocytic origin. However, the tumordid not exhibit polymorphism, heteromorphism, or mitotic figures which would confirm a diagnosis of malignant fibrous histiocytoma. It was thus diagnosed as a fibrous histiocytic tumor on the borderline between malignant and benign. We report the present case because the occurrence of a primary fibrous histiocytoma in an appendix of which the stalk is twisted is very rare.