A Case of Sacral Ancient Schwannoma Presenting With Abdominal Pain

We report the case of a female in her sixties presenting to secondary care with sudden-onset abdominal pain. Comprehensive laboratory and imaging investigations were performed, exploring a broad range of differential diagnoses. These ultimately revealed a rare manifestation of an ancient schwannoma located in her sacrum. This case contributes to the limited literature on schwannomas presenting outside the cranium and upper limbs and highlights the diagnostic challenges associated with atypical tumor locations. It serves as an important opportunity to reflect on clinical practice, for example, the work-up for abdominal pain and the value of different imaging modalities in such cases. It also exemplifies the varying difficulty faced between centers in accessing specialist investigations and demonstrates the patient experience.