Epidermoid Cyst in the Cerebellopontine Angle: Technical Description Video

Abstract

Objectives To describe the operative technique for treatment of epidermoid cysts in the cerebellopontine angle (CPA).

Design The present video is a case report.

Setting Patient is positioned in three-quarters prone. Retrosigmoid approach should be made under neurological monitoring and with neuronavegation to help achieve maximal safe resection. The skin incision is vertical, slightly curved, 5 mm medial to the mastoid notch. Craniectomy is superiorly limited by the transverse sinus and laterally limited by the sigmoid sinus. A C-shaped durotomy is made with its base protecting the sigmoid sinus. The lesion is removed in piecemeal fashion ([Fig. 1]). The neurological monitoring helps.

Results The patient was discharged 2 days later without neurological deficits.

Conclusions The surgical treatment associated with neurological monitoring and neuronavegation is a safe procedure to treat epidermoid cysts in the CPA.

The link to the video can be found at: https://youtu.be/sEuFyq9c2sw.

Keywords

epidermoid cyst - cerebellopontine angle lesion - cerebellopontine angle microsurgery - epidermoid cyst surgery

Fig. 1 Intraoperative images. (A) Patient position, (B) asterion exposure, (C) epidermoid cyst identification, (D) lesion removal in piecemeal fashion, (E) intraoperative neurological monitoring, (F) anatomopathological study confirming the diagnosis.

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Conflict of Interest

None to disclose.