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

Figure 3 Pre-operative abdomen and pelvis magnetic resonance imaging scan. A: Axial diffusion-weighted imaging (DWI) image shows hypersignal intensity of the lesion in the right adnexal region (axial, yellow arrow); B: T1-weighted image shows a regular mass with low signal intensity in the right retroperitoneum (axial, white arrow); C: T2-weighted image shows a regular mass with inhomogeneous slightly-high/high signal intensity in the right retroperitoneum (coronal, white arrow); D: STIR image shows a regular mass with inhomogeneous high signal intensity in the right retroperitoneum (axial, white arrow).