From a Common Symptom to a Rare Diagnosis: A Case Report of Metastatic Solitary Fibrous Tumors

Low back pain is one of the most common reasons for medical appointments in primary care. Although mostly benign and self-limited, it requires careful evaluation in order to identify serious underlying conditions.  Solitary fibrous tumors (SFTs) are rare fibroblastic mesenchymal neoplasms with low metastatic potential that can be present anywhere in the body, with nonspecific associated symptoms.  We exhibit the case of a young patient who was diagnosed with metastatic SFT after perceiving a painless mass in the dorsal region associated with low back pain refractory to analgesics, describing its features, and performing a literature review.