HIV–associated neurosyphilis mimicking acoustic neurinoma

Neurosyphilis mimicking a bilateral vestibulocochlear schwannoma

“…Bruno Niemeyer de Freitas Ribeiro [1], [2] , Rafael Teixeira de Hollanda Lima [2] and Edson Marchiori [3] [1]. Instituto Estadual do Cérebro Paulo Niemeyer, Departamento de Radiologia, Rio de Janeiro, RJ, Brasil.…”

“…Hospital Rede Casa/3D Diagnóstico por Imagem, Departamento de Radiologia, Rio de Janeiro, RJ, Brasil. [3]. Universidade Federal do Rio de Janeiro, Departamento de Radiologia, Rio de Janeiro, RJ, Brasil.…”

“…Although uncommon, vestibulocochlear neuritis may be the first sign of neurosyphilis, which develops early in 4% of HIV-positive patients [1][2][3] . It may be isolated or associated with other cranial nerve lesions, manifesting with sudden or rapidly progressing (within a few days) hearing loss [1][2][3] . The main differential diagnosis is schwannoma, the most common internal auditory canal lesion.…”

“…Clinicians must be aware that neurosyphilis may mimic other diseases. This condition should be included in differential diagnoses of lesions involving cranial nerve VIII, especially when they occur bilaterally and affect the membranous labyrinth [1][2][3] .…”

Diagnostic and surgical challenges in resection of cerebellar angle tumors and acoustic neuromas

“…[522] On imaging, vascular lesions are often visualized secondarily due to their flow voids; otherwise, the thrombosed lesion may be overlooked. Contrast administration will enhance these lesions when the blood is fast moving, but the lesion will not enhance if the blood is slow moving.…”