Hybrid Treatment Approach for a Rare Middle Cranial Fossa Intracranial Tumor in a Pediatric Patient: A Case Report.

Pediatric central nervous system (CNS) tumors are often classified by distinct histologic and molecular features; however, some tumors remain unclassified, resulting in diagnostic and therapeutic challenges. We report a case of a previously healthy 3-year-old female who presented with right eyelid ptosis and headache. Imaging revealed a right middle cranial fossa mass. Following surgery and histopathologic and molecular analyses, the diagnosis was a malignant neoplasm with mixed neural and myoblastic differentiation, not elsewhere classified based on the current World Health Organization (WHO) classification. We describe a unique hybrid treatment approach for this rare tumor consisting of rhabdomyosarcoma and embryonal treatment regimens.