34-year-old female with melanoma, status post liver wedge resection and intraoperative laparoscopic ultrasound guided microwave ablation of tumor. Please do MRI liver protocol to evaluate for abnormalities. ABDOMEN:LIVER, BILIARY TRACT: Interval development of a wedge-shaped segment 7 ablation cavity. The circumferential T1 precontrast increased signal intensity likely represents hemorrhage or coagulation necrosis (axial series 1001 image 26). On the postcontrast subtraction series, thin peripheral enhancement is noted without focal nodularity at this level (axial series 10011 image 128). No new lesions identified. The portal and hepatic veins are patent. SPLEEN: No significant abnormality noted.PANCREAS: No significant abnormality noted.ADRENAL GLANDS: No significant abnormality noted.KIDNEYS, URETERS: Bilateral renal cysts.RETROPERITONEUM, LYMPH NODES: The known small right cardiophrenic lymph node is partially visualized (coronal series 4 image 13).BOWEL, MESENTERY: Trace free fluid in the pelvis could be physiologic in a premenopausal woman.BONES, SOFT TISSUES: No significant abnormality noted.OTHER: No significant abnormality noted.
Wedge-shaped hepatic segment 7 ablation cavity. Apparent thin peripheral enhancement is favored to represent the adjacent liver capsule. No definite nodularity seen to suggest residual tumor.