Needle displacement during stereotactic biopsy of a meningioma: a case report
Histological diagnosis of brain tumours based on neuroradiological imaging is not always easy. A biopsy procedure may be necessary in selected cases to achieve a correct diagnosis and to apply an adequate therapy. We observed a young man with a rounded mass located in the right temporal lobe. Diagnosis was not possible by CT, MRI and angiography. We therefore decided to perform a brain biopsy using a sterotactic procedure. Histological examination of the fresh biopsy cylinder yielded a diagnosis of papilloma of the choroidal plexus. CT performed after the sterotactic procedure showed the biopsy track outside the tumour, not reaching the target but ending medial to the lateral ventricle, thus documenting procedure failure. This could have been due to displacement of the needle, possibly by a solid mass, during the stereotactic procedure. A new target was calculated and the biopsy repeated. The histological diagnosis was meningioma. The patient was submitted to open brain surgery and a solid meningioma was revealed.
key wordsStereotactic brain biopsy, failure
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