RESUMEN
Nephrogenic adenoma is a rare benign urinary tract lesion. There are pediatric cases that have been managed with intravesical sodium hyaluronate, but there are no published adult cases. We present the first case of an adult successfully treated with intravesical sodium hyaluronate without resection. A 77-year-old man was investigated with cystoscopy for lower urinary tract symptoms (LUTS) unresponsive to medical therapy. This revealed multifocal flat black bladder lesions. Biopsy showed the lesions to be nephrogenic adenoma. His LUTS were treated with 6 weeks of intravesical sodium hyaluronate. He returned 6 weeks later for resection of his bladder lesions. However, resection was abandoned as the bladder lesions had entirely resolved. The resolution of the bladder lesions following intravesical sodium hyaluronate was unexpected but does agree with existing literature. The two reported pediatric cases also suggest that intravesical sodium hyaluronate is therapeutic for nephrogenic adenoma.
RESUMEN
Reelin is a secreted, signaling protein associated with neuronal cell positioning and migration. Recently, reelin was found to be epigenetically silenced in gastric and pancreatic cancers in which down-regulation was associated with increased migratory ability and reduced survival. Here we analyzed reelin expression by immunohistochemistry in 17 normal breast tissue samples from reduction mammoplasties and in two independent tissue microarrays of 136 and more than 2000 breast cancer biopsy samples, respectively. Results were analyzed with regard to clinical parameters, including BRE (Bloom, Richardson, Elston) grade, nodal status, estrogen receptor and HER2 status, and overall survival. Reelin was expressed in the luminal epithelium and myoepithelium of the normal human breast but not in cancerous breasts. Loss of reelin protein expression correlated significantly with decreased survival (P=0.01) and positive lymph node status (P<0.001). By measuring reelin expression and promoter methylation status in 39 primary breast tumors, as well as in breast cancer-derived cell lines before and after decitabine treatment, we established that reelin expression levels correlated inversely with promoter methylation status, whereas demethylation increased reelin mRNA expression in vitro. Reelin overexpression in MDA-MB231 cells, as well as incubation with recombinant reelin, suppressed cell migration, invadopodia formation, and invasiveness in vitro. We conclude that reelin may play an important role in controlling invasiveness and metastatic potential of breast cancer cells and that its expression is controlled by promoter methylation.