[Type I Chiari malformation as a cause of inferior vertical nystagmus]. / Malformación de Chiari tipo I como causa de nistagmo vertical inferior.

Down beat nystagmus is a central nystagmus. In the literature reviewed the two most common causes that can produce it are cerebellar degenerations and Chiari malformation. The site of lesion causing this nystagmus appears to be the brainstem or the cerebellum, although the definitive etiopathogeny remains controversial. We report the case of a 73-year-old woman with sudden unsteadiness of gait and down beating nystagmus, without any other vestibular or neurologic signs. Simple radiology and MRI evidenciated a Chiari malformation type 1 associated to plastybasia.

[Microcytic carcinoma of the nose cavity. A case report]. / Carcinoma microcítico de fosa nasal. A propósito de un caso.

Tumors of the nasal cavity and sinuses are rather infrequent, being squamous carcinoma the predominant type, which accounts for the 80 percent of the totality of them. Maxillary sinus is the most affected, followed by nose cavity. Half of cases are originated on turbinates. We present the clinical case of a woman patient diagnosed of microcytic carcinoma of the right nasal cavity originated at the level of middle turbinate. The mass filled the width of the fossa getting in touch with the nasal septum, without encroaching it. According its extent the tumor was classified as T2, N0, M0 and treated with radiotherapy only. Microcytic carcinoma is an exceptional histological type in nasal cavity and next to its numeric meagerness in this location makes this case a very peculiar one.

[Labyrinth aspects of cranial Paget's disease]. / Manifestaciones laberínticas en la enfermedad de Paget craneal.

We report the case of a 44-year-old woman suffering, since 5 years, from repetitive vertigo seizures, lasting less than one hour, together with light neuro-sensorial deafness, fullness of the left ear and left ear tinnitus. After analysis of audiologic and imagery tests a Meniere's syndrome secondary to Paget disease--confirm histologically through cortical cranial biopsy--was established.