PMC4159361_01
A 5.2-cm right ovarian tumor is shown. This ovarian tumor is indicated by high signal intensity on T1-weighted images, and low to iso-intensity signal on T2-weighted images. Moreover, fatty elements were identified on fat-saturated T1-weighted images.
ccrep-7-2014-091f1.jpg
PMC4159361_01_ccrep-7-2014-091f1.jpg
f1-ccrep-7-2014-091
The size of tumor was 48 x 52 mm, with no solid components to suggest malignancy on the CT scan or MRI (Fig. 1).
The macro findings of this tumor resembled those of mature cystic teratoma, including some fat tissue, hair, skin, and bone. It was difficult to diagnose the tumor as immature teratoma by macroscopic findings alone.
ccrep-7-2014-091f2.jpg
PMC4159361_01_ccrep-7-2014-091f2.jpg
f2-ccrep-7-2014-091
The macroscopic finding of the tumor did not contradict the diagnosis of mature cystic teratoma (Fig. 2).
Nests of immature nerve cells suggestive of immature teratoma were found in the histological analysis.
ccrep-7-2014-091f3.jpg
PMC4159361_01_ccrep-7-2014-091f3.jpg
f3-ccrep-7-2014-091
However, the final pathological diagnosis was, unexpectedly, immature teratoma G1 (Fig. 3).
No disseminated tumors were detected in the pelvic cavity, uterus, or adnexa after the first operation. The patient underwent salpingo-oophorectomy of the affected side.
ccrep-7-2014-091f4.jpg
PMC4159361_01_ccrep-7-2014-091f4.jpg
f4-ccrep-7-2014-091
As there were no findings of residual tumor in the peritoneum, omentum, or the other ovary, we removed only the affected ovary (Fig. 4).
PMC4159361_02
PMC4159361_03