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Case reports 2 8 1 did they show significant UDPGD activity. Macrophage antigens (CD45, CD68 and the antigen recognised by Mac 387) were not expressed in the tumour cells of any of the three tumours though they identified macrophages in the tumours and, in the case of CD45, other bone marrow-derived cells. DiscussionSynovial fibroblasts characteristically show high levels of activity of the enzyme UDPGD, and co-express VCAM-1 and the antigen detected by monoclonal antibody 67. This study did not detect the expression of any of these differentiation markers in the neoplastic cells of synovial sarcoma. Thus, synovial sarcomas did not appear to show fibroblastic synoviocyte differentiation, a finding which further confirms the inappropriateness, from a biological viewpoint, of the name synovial sarcoma. The type of differentiation shown by the tumour spindle cell element of synovial sarcomas remains unknown. 2. Miettiien M. Vitanen I. Synovial sarcoma-a misnomer. Am. J. 3. Wilkinson LS, Pitsillides AA, Worrall JG, Edwards JCW. Light microscopic characterization of the fibroblast-like synovial intimal cell (synoviocyte). Arthritis Rheum. 1992; 35; 1179-1184. 4. Wilkinson LS, Edwards JCW, Poston RN, Haskard M). Expression of vascular cell adhesion molecule-1 in normal and innamed synovium. Lab. Invest. 1993; 68; 82-88. 5. Stevens CR, Map PI, Revell PA. A monoclonal antibody (Mab 67) marks type B synoviocytes.malignant mural nodules, an anaplastic carcinoma and a malignant fibrous histiocytoma, have been reported to date415. We present another case of pancreatic mucinous cystadenocarcinoma with a mural nodule with features of anaplastic carcinoma as shown by histology, immunohistochemistry and electron microscopy. Case reportA 70-year-old woman was admitted to our hospital with a cystic tumour in the body/tail of the pancreas that was disclosed by an ultrasound abdominal scan and confirmed by computerized axial tomography. The patient never had jaundice, fever or alteration of