[Malignant pleomorphic adenoma of the palate]. / Adenoma pleomorfo maligno del paladar.

Pleomorphic adenoma or mixed tumor is the most common benign neoplasm of the minor salivary glands. These tumors rarely have malignant features. Three varieties are differentiated by histological features and tumor behavior. Whether malignant tumors develop on benign adenomas or are malignant from onset is still not known. A malignant mixed tumor of the minor salivary glands of the palate is reported. The difficulty of histological diagnosis, in spite of immunohistochemical techniques, is emphasized and the surgical treatment is described.

[Hemangiosarcoma of the nasal cavity]. / Hemangiosarcoma de fosas nasales.

Hemangiosarcoma is a rarely diagnosed in the nasal cavity and there are few reports in the ENT literature. The most interesting aspect of our 82-year-old male's case was that he presented all the findings characteristic of angiosarcoma, but the final post-mortem diagnosis was unexpected because of the poor information available until that moment.

[Meningitis and cerebrospinal liquid fistula as a complication from the surgery of endolymphatic sac]. / Meningitis y fístula de LCR como complicación de un caso de cirugía del saco endolinfático.

A 28 years old woman diagnosed of Méniére's disease was surgically treated with a drainage from endolymphatic system and a valve placed. Six years after surgery, the patient presented a bacteria meningitis an a cerebrospinal fluid leak to mastoid was found. New surgery was needed. Complications of endolymphatic system surgery, its treatment and frequency are discussed. This case is a very rare.