Intracranial squamous cell carcinoma arising in a cerebellopontine angle epidermoid cyst: A case report and literature reviewopen access
- Authors
- Roh, Tae Hoon; Park, Yong Sook; Park, Yong Gou; Kim, Se Hoon; Chang, Jong Hee
- Issue Date
- Dec-2017
- Publisher
- LIPPINCOTT WILLIAMS & WILKINS
- Keywords
- brain neoplasms; cerebellopontine angle; epidermoid cyst; malignant transformation; squamous cell carcinoma
- Citation
- MEDICINE, v.96, no.51
- Journal Title
- MEDICINE
- Volume
- 96
- Number
- 51
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/1589
- DOI
- 10.1097/MD.0000000000009423
- ISSN
- 0025-7974
1536-5964
- Abstract
- Rationale:Most of the intracranial epidermoid cysts are benign, but malignant lesions are occasionally reported. These lesions appear as squamous cell carcinoma and carry a dismal prognosis. Here, we report a case of a primary intracranial squamous cell carcinoma arising in a cerebellopontine epidermoid cyst. The relevant literatures were also reviewed.Patient concerns:A 53-year-old woman presented with dizziness and diplopia 9 months in duration. Magnetic resonance imaging revealed an epidermoid cyst in the left cerebellopontine angle and prepontine region with a focal enhancing lesion on T1-weighted gadolinium-enhanced images.Diagnoses:Histopathologic diagnosis revealed squamous cell carcinoma on a background of epidermoid cyst. Imaging studies excluded metastases.Interventions:The tumor was removed subtotally through a lateral suboccipital approach. The patient received intensity modulated radiation therapy (6720cGy total) postoperatively.Outcomes:The patient was free from recurrence of the tumor until 3 years after surgery, at which point she was lost to follow-up. The patient died 4 years after the surgery.Lessons:The epidermoid cyst may occasionally become malignant. Finding an area of enhancement through preoperative magnetic resonance imaging can help to make a correct diagnosis. Based on the review of previous reports, surgical removal followed by radiotherapy shows the best result to treat malignant epidermoid cysts.
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