[Analysis of BRAF and NRAS mutations in thyroid tumors in patients from Argentina].

Introduction: Molecular alterations in follicular cells in the BRAF or NRAS genes have been reported to be associated with the process of carcinogenesis. Our aim was to determine the mutational frequency of BRAF and NRAS in fine-needle aspiration (FNA) specimens in our population.

Methods: The mutational status of BRAF (codon 600) and NRAS (codon 61) was analysed by qPCR in 193 FNA specimens from suspicious nodules and compared with pathological data of 115 patients.

Unusual benign paratesticular tumor in an infant mimicking rhabdomyosarcoma.

Paratesticular tumors are extremely rare, with paratesticular rhabdomyosarcoma being the most common finding. A 6-month-old boy presented with an asymptomatic, right intrascrotal mass whereby the testicle was surrounded by a friable lipomatous tumor. Frozen section revealed an inflammatory process, negative for malignancy.

Treatment of uremic hyperparathyroidism with percutaneous ethanol injection.

The percutaneous ethanol injection (PEI) with ultrasound guidance has been suggested for the treatment of patients with hyperparathyroidism who are on dialysis, with the aim of selectively treating the parathyroid glands with nodular hyperplasia. We present our experience in 25 patients with chronic renal failure followed during 13.4 +/- 10.