Malignant struma ovarii with papillary carcinoma combined with retroperitoneal lymph node metastasis: A case report

Figure 2 Pre-operative pelvis magnetic resonance imaging scan. A: T1-weighted image shows an irregular mass with mixed signal in the right adnexal region with iso/hypo-signal intensity (axial, yellow arrow); B: T2-weighted image shows an irregular mass with a heterogeneous slightly high signal intensity in the right adnexal region (axial, yellow arrow); C and D: Short time of inversion recovery image shows an irregular mass with a heterogeneous slightly high signal intensity in the right adnexal region (yellow arrow) (C: Cornal; D: Sagittal).