Real-time contrast-enhanced ultrasound-guided percutaneous biopsy in the diagnosis of malignant solitary fibrous tumor of liver: A case report and review of the literature

Solitary fibrous tumor of liver (SFTL) is a rare mesenchymal neoplasm. Due to its low incidence and atypical clinical presentation, preoperative diagnosis is often challenging, making imaging features critical for its identification. Contrast-enhanced ultrasound (CEUS), a dynamic imaging technique, has been demonstrated to provide high diagnostic accuracy for hepatic lesions. This study reports the CEUS characteristics of a percutaneous biopsy-confirmed SFTL in an adult patient. The findings included peripheral hyperenhancement during the arterial phase, progressive centripetal filling with partial perfusion defects, and early washout commencing in the portal venous phase, which became more pronounced in the delayed phase.