LAUSR

Abstract Background/Aim: Certain types of soft-tissue tumors are sometimes combined with bleeding, resulting in difficulty distinguishing them from a mere hematoma when patients with unnoticed soft-tissue tumor sustain trauma. Case Report: A 43-year-old man presented with left calf pain after running practice. Magnetic resonance imaging (MRI) revealed that the lesion seemed to be a soft-tissue mass with surrounding edema, located between the soleus and medial gastrocnemius muscle. An unnoticed soft-tissue tumor with traumatic bleeding was suspected. Two weeks later, MRI revealed that the bleeding had decreased, and the mass had changed to hyperintense on T1-weighted MRI, with heterogenic intensity on T2-weighted MRI. The calf pain had nearly almost resolved. Conclusion: Changes in MRI findings of traumatic hematoma over time are important for the diagnosis. In particular, changes in the intensity of the mass in the subacute phase from the acute phase must be considered when determining the possibility of traumatic hematoma.