Abstract
Epidermoid tumors (ET) are slow-growing masses where malignant transformations occur
extremely rarely. Malignant transformation warning signs are the rapid-onset, progression,
and recurrence of symptoms. The radiologic evidence for malignant transformation is
contrast enhancement with rapid growth, observed with magnetic resonance imaging (MRI)
or computed tomography scans. Here, we provide a case report of a 68-year-old woman
with a long-standing history of left-sided cerebellopontine angle ET who presented
with a recent worsening of symptoms, and MRI observation of new ET contrast enhancement.
Surgical re-exploration and histopathologic confirmation are mandatory in this setting
of recent symptom worsening and MRI observation of rapid mass growth.
Keywords
brain tumor - cerebellopontine angle - epidermoid tumor - malignant transformation
- rapid progression - recurrence - squamous cell carcinoma
