[Vaginal Follicular dendritic cell sarcoma in patient with previous urinary tract carcinoma. Case Report].

Introduction: follicular dendritic cell sarcoma (FDC sarcoma) is an uncommon neoplasm derived from FDC present in lymphoid follicles. It usually presents in lymph nodes, being extranodal location a very unusual event.

Case Report: A 78 year old female, with prior left nephrectomy for invasive urothelial carcinoma, consulted for genitorragia.

Polyunsaturated fatty acids and gliomas: a critical review of experimental, clinical, and epidemiologic data.

Certain polyunsaturated fatty acids (PUFAs) called essential fatty acids (EFAs) cannot be biosynthesized by the body and hence, need to be obtained from diet. These PUFAs and their metabolites have multiple physiological functions that are altered in tumor cells due to a decreased expression of Δdelta-6-desaturase, which is an essential step in their metabolism. As a result, tumor cells would be protected from the toxic effect caused by free radicals, one product of EFA metabolism.