case_images: PMC11835118_01
case_images: (A-H) CT and MRI imaging of the tumor. (A) A cystic-solid mixed-density shadow was seen on the right side of the pelvis, with a small amount of calcification (arrow). (B) The cystic component exhibited fat density (arrow). (C) The solid part of the lesion demonstrated marked and more homogeneous enhancement on scanning (arrow). (D) The cystic part of the T1WI sequence showed a high-signal area (arrow). (E) The cystic part of the T2WI showed a high-signal shadow (arrow). (F) The signal of the cystic part was significantly attenuated on compressed fat scanning (arrow). (G) Significant homogeneous enhancement of the solid portion following enhancement (arrow), while the cystic portion was not enhanced. (H) Significant homogeneous enhancement of the solid portion following enhancement (arrow), while the cystic portion was not enhanced.
case_images: medi-104-e41557-g001.jpg
case_images: PMC11835118_01_medi-104-e41557-g001.jpg
case_images: F1
case_images: Abdominal CT revealed a cystic-solid mixed-density shadow in the right pelvis (Fig. 1A), measuring approximately 6.7 x 7.7 x 9.8 cm, with clear boundaries, small calcified shadows, and fat density in the cystic component (Fig. 1B). The enhancement scan showed a homogeneous strengthening of the solid part of the lesion (Fig. 1C), and the diagnosis was considered to be a teratoma. T2WI (Fig. 1D and E) and a low signal after fat compression scanning (Fig. 1F). The size was approximately 6.7 x 7.7 x 9.8cm, and the solid part of the enhancement scan showed apparent strengthening with a smooth edge (Fig. 1G and H). The final preoperative diagnosis was ovarian teratoma.
case_images: (A-F) Pathological findings and immunohistochemical staining results. (A) H&E, x100, (B) H&E, x200, (C) CD56, (D) CgA, (E) CK, and (F) Syn (IHC, x200).
case_images: medi-104-e41557-g002.jpg
case_images: PMC11835118_01_medi-104-e41557-g002.jpg
case_images: F2
case_images: Postoperative pathology revealed a mature cystic teratoma with a carcinoid tumor of the ovary (Fig. 2A and B). Immunohistochemistry results showed weak positivity for ER and PR, negativity for WT-1, CA125, and P53, small foci positivity for CEA, CK7, CK20, and CDx-2, 1% positivity for Ki-67, positivity for CK, Vim, CD99, and CD56, individual positivity for a-Inhibin and Calretinin, partial positivity for EMA, and positivity for CgA and Syn (Fig. 2C-F).