Cerebellopontine Angle Lipomas: Report of Four Cases and Review of the Literature

Tankéré, F.; Vitte, E; Martin-Duverneuil, N; Soudant, J

doi:10.1227/00006123-200203000-00037

Cited by 28 publications

(59 citation statements)

References 49 publications

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“…The CT scan demonstrates a marked hypodense nonenhancing lesion in the CPA, with attenuation characteristics similar to adipose tissue (-40 to -100 HU) 1,5,9,10 . Regarding the MR imaging findings, lipomas have signal characteristics similar to the subcutaneous tissue, with high-signal intensity on T1-weighted images, and iso-to hypointense signal on T2-weighted images, usually without contrast enhancement 1 .…”

Section: Casementioning

confidence: 99%

“…These tumors can cause symptoms related to the VIII nerve involvement, such as hearing loss, tinnitus, vertigo and nausea. However, trigeminal symptoms such as neuralgia, paresthesia or headache, can also occur in patients with CPA lipomas extending to the trigeminal nerve 3,5,7,8 . Our patients presented with headache, vertigo and sensorineural hearing loss.…”

Section: Casementioning

confidence: 99%

“…Due to their peculiar imaging findings, the diagnosis of intracranial lipomas is highly suggestive on the basis of imaging studies 3,5 . The CT scan demonstrates a marked hypodense nonenhancing lesion in the CPA, with attenuation characteristics similar to adipose tissue (-40 to -100 HU) 1,5,9,10 .…”

Section: Casementioning

confidence: 99%

“…The high-density structures seen inside the lesion on CT scan, which are hypointense on T1-weighted MR imaging, most likely represent cranial nerves. The differential diagnosis of CPA lipomas should include vestibular schwannoma and meningiomas, as well as other fatty tumors, such as epidermoids and dermoids cysts 5,8,11,13 . In our cases the CT scan showed a CPA hypodense lesion.…”

Section: Casementioning

confidence: 99%

“…These tumors are maldevelopmental masses that arise from abnormal differentiation of the meninx primitiva 1,4,5 . Clinically, CPA lipomas can cause slowly progressive neurological symptoms and signs affecting cranial nerves or brain stem 3,[6][7][8] .…”

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confidence: 99%

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Cerebellopontine angle lipomas: magnetic resonance imaging findings in two cases

Borges

Brito

Carvalho³

et al. 2009

Arq. Neuro-Psiquiatr.

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Vestibular schwannomas and meningiomas are the most common lesions of the cerebellopontine angle (CPA), accounting for approximately 85-90% of the tumors seen in this location 1 . Lipomas are rare at this topography, representing about 0.15% of the CPA lesions 2,3 . These tumors are maldevelopmental masses that arise from abnormal differentiation of the meninx primitiva 1,4,5 . Clinically, CPA lipomas can cause slowly progressive neurological symptoms and signs affecting cranial nerves or brain stem 3,[6][7][8] . Because these lesions usually are strongly attached to the surrounding structures, any surgical attempts of complete resection can result in neural or vascular damage, reinforcing the importance of the pre-operative imaging diagnosis [1][2][3]7,9,10 . Although the CT findings of CPA lipomas can be typical, the magnetic resonance (MR) imaging, especially the fat suppression sequences, had improved the identification of these lesions.We aimed to report two patients with a CPA lipoma, emphasizing the MR imaging findings. CaSeCase 1 A 13-year-old female patient was evaluated due to a 1-year history of headache and hearing loss. The physical examination was unremarkable. The audiometric evaluation demonstrated a discrete sensorineural hearing loss on the right side. The CT scan revealed a markedly hypodense non-enhancing mass in the right CPA. The MR imaging showed a lesion measuring 2.1 × 2.0 × 1.7 cm in the right CPA cistern. The mass was hyperintense on T1-weighted images and isointense with hypointense halo (chemical-shift) on T2-weighted images, with very low signal on T1-weighted images with fat suppression (Figs 1 and 2). The VII and VIII cranial nerves were seen as linear images with low signal inside the CPA mass. The diagnosis of CPA lipoma was sug-

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