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|LETTER TO EDITOR
|Year : 2013 | Volume
| Issue : 6 | Page : 679-680
Foot drop caused by cerebral cavernous angioma
B. C. M. Prasad, VV Ramesh Chandra, V Jayachandar
Department of Neurosurgery, SVIMS, Tirupati, Andhra Pradesh, India
|Date of Submission||01-Aug-2013|
|Date of Decision||02-Aug-2013|
|Date of Acceptance||03-Dec-2013|
|Date of Web Publication||20-Jan-2014|
Department of Neurosurgery, SVIMS, Tirupati, Andhra Pradesh
Source of Support: None, Conflict of Interest: None
|How to cite this article:|
Prasad B, Ramesh Chandra V V, Jayachandar V. Foot drop caused by cerebral cavernous angioma. Neurol India 2013;61:679-80
Foot drop is defined as loss of dorsiflexion of ankle and is commonly due to lesions of the peroneal nerve or fifth lumbar nerve root. , Rarely it can be due to cerebral lesions and the most common causes are tumors, ,,,, trauma  and demyelination plaques.  Foot drop due to cerebral cavernoma has not been reported.
A 35-year-old woman presented with a history of focal seizures and weakness of the left lower limb of 10 days duration. Neurological examination revealed spasticity of the left lower limb and extensor plantar response and weakness of ankle dorsiflexion (grade 2/5). Brain computed tomography revealed a hyperdense lesion in the right parasagittal parietal region [Figure 1]a and brain magnetic resonance imaging revealed a heterogeneous, altered signal intensity lesion in the right parasagittal parietal region, which was hypointense with hyperintense foci and no contrast enhancement in T1W images [Figure 1]b, e and f.The lesion was hyperintense with hypointense peripheral rim on T2W [Figure 1]c and fluid-attenuated inversion recovery [Figure 1]d sequences. With a diagnosis of right parasagittal cavernoma the patient was taken up for right parasagittal craniotomy and total excision of the cavernoma was done. The diagnosis of cavernoma was confirmed on histopathological examination. The post-operative period was uneventful. At three months follow-up she regained the normal strength of ankle dorsiflexion.
Lesions of the parietal lobe, in the parasagittal region near the foot homunculus of the motor strip may produce foot drop.  Although rare and underappreciated, many cerebral lesions such as glioma,  meningioma, ,, abscess,  head injury,  metastasis, , cerebral hemorrhage and demyelination plaques  can present with foot drop. Review of the literature revealed twenty four cases of foot drop of cerebral origin. The most common causes identified were glioma followed by meningioma and trauma. However, cerebral cavernoma presenting with foot drop has not been reported, probably our patient may be first such case. Most previous reported cases had accompanying upper motor neuron signs or symptoms such as hyperreflexia, ankle clonus and Babinski signs similar to our patient. , Good results , were achieved in most of the cerebral causes of foot drop as seen in our patient. Central causes of foot drop should be considered in the differential diagnosis of foot drop when associated with upper motor neuron signs.
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