title: [Pathological laughing and posterior fossa tumours (author's transl)].
abstract: Posterior fossa tumours give rise, sometimes, to psychiatric disturbances, which are difficult to diagnose, when they are isolated without any neurological signs. This was the case in our report of a 32-year-old man who had a pathological laugh, unique symptom, during 4 months, of a trigeminal neurinoma. Spasmodic laughs related to posterior fossa tumours are infrequently reported in the literature. They always are the sign of a pseudo-bulbar syndrome, due to a bilateral lesion of the cortico-bulbar tracts. Other involuntary laughs are encountered in third ventricle's lesions, in frontal lobe lesions and in epilepsy.
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000150:complications*; D002551:Cerebral Ventricle Neoplasms / Q000150:complications; D002648:Child; D003388:Cranial Fossa, Posterior; D003390:Cranial Nerve Neoplasms / Q000150:complications*; D004827:Epilepsy / Q000150:complications; D005260:Female; D005625:Frontal Lobe; D006801:Humans; D007845:Laughter; D008297:Male; D001523:Mental Disorders / Q000209:etiology*; D008875:Middle Aged; D009442:Neurilemmoma / Q000150:complications*; D014276:Trigeminal Nerve
vernacular_title: Rires pathologiques et tumeurs de la fosse postérieure.