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Lipoma in the cerebellopontine angle--case report
S Nishizawa1, T Yokoyama, S Ohta
1Department of Neurosurgery, Hamamatsu University School of Medicine, Shizuoka.
Neurologia Medico-Chirurgica
|February 1, 1990
Summary
This study details a rare cerebellopontine angle lipoma in a male patient presenting with vertigo and hearing loss. The tumor
Area of Science:
- Neuropathology
- Neuroimaging
- Neurosurgery
Background:
- Cerebellopontine (CP) angle lipomas are rare, benign tumors typically composed of mature adipose tissue.
- Symptoms associated with CP angle tumors often include hearing loss, tinnitus, and vertigo due to compression of cranial nerves.
Observation:
- A 38-year-old male presented with vertigo, left tinnitus, and left hearing disturbance.
- Imaging revealed a nonenhanced, low-density area in the left CP angle on CT and a high-intensity region on MRI.
- Surgical removal was partial due to the tumor's adherence to the vestibulocochlear nerve (VIIIth nerve) and brainstem.
Findings:
- Histological examination of the resected tumor revealed mature lipocytes, consistent with a lipoma.
- Unusually, the lipoma also contained a segment of mature cartilage, a finding not previously reported in CP angle lipomas.
- The presence of cartilage represents a significant deviation from the typical histological profile of these tumors.
Implications:
- This case highlights the potential for rare histological variations in common tumor types.
- The unusual cartilaginous component may influence surgical strategy and prognosis for CP angle lipomas.
- Further research into the developmental origins of such mixed tumors is warranted.