The first two Uruguayan cases of botryomycosis were diagnosed in white adult male patients with cutaneous lesions. Staphylococcus aureus was the etiologic agent in both cases. In one of them, however, Pseudomonas aeruginosa was also identified during relapse. General comments on diagnosis and pathogenesis of the disease are made.

e14682 Background: Alterations in the O-glycosylation is one of the most common changes during colon carcinogenesis, which leads to the expression of short O-glycan antigens (Tn, sialyl-Tn, Tk, and core 6). These structures are associated with malignant behavior being actively investigated as targets for immunotherapy. The enzymes of GalNAc-T family regulate the initial step in mucins O-glycosylation and could be responsible for the altered glycosylation observed in cancer. The aim of this work was to evaluate the expression of GalNAc-T6 in colon cancer, and to determine its role as prognostic marker. Methods: We evaluated GalNAc-T6 expression in colon cell lines by immunocytochemistry, and in colon cancer tissue samples by immunohistochemistry using the monoclonal antibody T6.3 developed by us (Berois et al. J Histochem Cytochem. 2006). We analyzed 103 colon cancer samples and 10 normal colon tissues. Results: We found that GalNAc-T6 (usually expressed in normal placenta, trachea, pancreas and brain) is detected in colon cancer cell lines. GalNAc-T6 was also detected by immunohistochemistry in 50.5% of samples with cancer and no expression was found in normal colon tissue. The staining pattern was predominantly cytoplasmic. Multivariate analysis showed that GalNAc-T6 expression is an independent prognostic marker predicting improved survival in patients with positive tumors (p 0.014). Conclusions: GalNAc-T6 could be a new independent prognostic marker to predict better outcome in colon cancer patients.