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We present the case of a woman with Marfan's syndrome presenting with a clinical picture of acute gastroenteritis in whom severe bilateral hydroureteronephrosis associated to a neurogenic bladder and a giant anterior sacral meningocele was diagnosed incidentally. The importance of this case lies in the fact that the patient was asymptomatic despite the significant visceral repercussions already occurring that led to questioning of whether MRI follow-up would still be advisable even in the absence of symptoms.

After a morphometric study, done in adult temporals, of the inner diametre of the fallopian bony canal, of the thickness of both the epineural space and the nerve trunck (in petrous, tympanic and mastoid segments) and the like with the geniculate ganglion and the pyramidal bend, the AA. thrown out the conclusion that when a generalized edema of the nerve is expected the labyrinthine segment or the distal portion of the mastoidal segment are the sites to be found most precocious or heaviest compressed.