Recidiva of sacrococcygeal chordoma. Multidisciplinary collaboration.

Los cordomas son tumores derivados de los remanentes embrionarios de la notocorda. Son localmente invasivos y en estadios localizados la resección completa es el tratamiento de elección. Presentamos el caso de un varón de 77 años con recidiva de cordoma sacrococcígeo, intervenido por un grupo multidisciplinario formado por cirujanos coloproctólogos, plásticos y neurocirujanos, obteniendo resección en bloque y márgenes negativos.

Neurosarcoidosis presenting with isolated intracranial mass lesion and communicating hydrocephalus.

Isolated neurosarcoidosis is a very rare disease, which makes up 5-15% of sarcoidosis cases. Hydrocephalus is a rare clinical feature with a prevalence of 6% among these patients. Considering neurosarcoidosis in the differential diagnosis of a unique parenquimal mass lesion could help in the early identification of this disease.

[Intrasellar arachnoid cysts. Two case reports and literature review].

Intrasellar arachnoid cysts are an uncommon pathology, with only a few cases reported in scientific literature. Their physiopathology is still unknown, with different hypothesis about their development. Differential diagnosis with other cystic sellar lesions is difficult.

[Traumatic recurrence of idiopathic spinal cord herniation].

Idiopathic spinal cord herniation is a rare cause of thoracic myelopathy and its recurrence is even more infrequent. Cord herniation is through an anterior dural defect in thoracic spine with unknown causes. Symptomatic cases must be surgically treated to reduce the hernia and seal the defect to prevent recurrences.

[Pituitary pituicytoma].

Pituicytomas are rare entities which develop in the neurohypophysis. They were included in the last World Health Organization (WHO) Classification of Central Nervous System Tumours in 2007, but for many years they have been confused with other pituitary tumours. We report the case of a 31-year-old woman who was diagnosed of a tumour in the suprasellar region during an infertility study due to hypogonadotropic hypogonadism and slight hyperprolactinemia.