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Radiology Quiz Case 1: Diagnosis
Arch Otolaryngol Head Neck Surg. 2009;135(8):830.
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Diagnosis: Lipoma of the CPA
Lipomas are benign lesions that are believed to result from a maldifferentiation of the primitive meninx. Intracranial lipomas account for only 0.1% to 0.5% of all intracranial tumors. Most intracranial lipomas are located around the corpus callosum. Lipomas of the CPA are very rare. They may be asymptomatic and incidentally discovered on brain imaging.1 They can also produce symptoms due to the involvement of neighboring nerve structures. Vestibulocochlear signs (vertigo, tinnitus, and loss of hearing) are the most frequent symptoms.2-3 Facial nerve signs (hemifacial spasm and facial motor impairment) and trigeminal nerve signs (sensory loss and trigeminal neuralgia) are also common. Our patient presented with vertigo but showed signs of a CPA lesion: tremor and weakness of his right arm. These symptoms can be explained by the involvement of the vestibulocerebellar and vestibulospinal connections. The right limb tremor was episodic and usually occurred when the patient's arm was in an . . . [Full Text of this Article]
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Radiology Quiz Case 1
Natasa Klepac, Sanja Hajnsek, Iva Topic, Kamelija Zarkovic, David Ozretic, and Mario Habek
Arch Otolaryngol Head Neck Surg. 2009;135(8):828.
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