Introduction: Solitary fibrous tumors are mesenchymally derived masses most commonly originating from the lung pleura. Case report: Herein, we report a 6-month-old presenting with syndrome of inappropriate antidiuretic hormone secretion (SIADH) and a suprasellar mass. The mass proved to be a solitary fibrous tumor. This case and salient literature are reviewed. Conclusions: To our knowledge, this is the youngest patient to be described with a mass of this type within the central nervous system.