[Risk groups in differentiated thyroid carcinomas]. / Grupos de riesgo en carcinomas diferenciados de tiroides.

INTRODUCTION: Well-differentiated thyroid carcinoma represents 80% of all thyroid malignant tumours, with a survival rate of over 95% at 20 years in 80% of the cases. Although its incidence is increasing, survival remains unchanged. Prognostic factor evaluation allows identifying patients at high or low risk of recurrence, selecting those who will benefit from more aggressive therapy. MATERIAL: We have reviewed the incidence of malignant thyroid neoplasm, selecting them according to three different system definitions (TNM, GAMES, MACIS), as well as by post-surgical complication rate. RESULTS: Malignant neoplasm represents 28.8% of the thyroid-operated patients, 88% corresponding to well-differentiated carcinomas. 80% are in the low risk group, with similar numbers in all three staging system definitions. Multicentricity was found in 16%, with 50% of the lesions smaller than 2 cm. Permanent recurrent nerve palsy was 1.2% and 2.7% presented permanent postoperative hypocalcaemia. CONCLUSIONS: Risk group percentage is similar to that reported in the literature, with 80% having expected survival over 95% at 20 years. Risk factor evaluation should help to individualise treatment options, avoiding overtreatment and complications in patients that will not benefit from more aggressive therapy.

[Primary non-Hodgkin lymphoma of the parotid gland: Revision of 8 cases]. / Linfoma no Hodgkin primario de la glándula parótida: revisión de 8 casos.

The manifestation of non-Hodgkin lymphoma as a primary parotid tumour account for 5% of all tumours at this location. We present 8 patients diagnosed and treated for parotid non-Hodgkin lymphoma in our hospital between 1996 and 2003. Of the cases, 62% were women who had an indurated mass for almost 4 months. A fine needle aspiration and computed tomography were performed on all patients. The immunohistochemical study provided us with the definitive diagnosis. Biopsy was done in all cases. The treatment was chemotherapy in 75% cases and surgery in 25%. The objective was to analyse the clinical and pathological patterns, plus the different treatment modalities and prognoses, which characterise this type of pathology based on the analysis of our patients and compared with those reported in the literature.