PMC5331295_01
Pelvic magnetic resonance imaging (T2-weighted image) before the first surgery of Case  1. An intrapelvic tumor (9.2 x 7.6 x 7.5 cm in diameter) with high signal intensity is detected. The right ovary is normal.
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Magnetic resonance imaging (MRI) of the pelvis revealed a left ovarian tumor (9.2 x 7.6 x 7.5 cm in diameter) with high signal intensity that was capsulated with small amount of fluid in the Douglas pouch (Figure 1).
PMC5331295_02
Pelvic magnetic resonance imaging (T2-weighted image) before the second surgery of Case  2. Bilateral ovarian tumors are detected (right side: 4.4 cm, left side: 8.0 cm in diameter).
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Sixteen months after the first surgery, bilateral ovarian tumors were detected with echogram and pelvic MRI (right side: 4.4 cm, left side: 8.0 cm in diameter) during her regular check-up (Figure 2).
Pelvic magnetic resonance imaging (T2-weighted image) before the third surgery of Case  2. Right ovarian tumors are detected (multiple cystic, 6.3 x 4.9 cm in diameter).
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Four months after the last surgery, a right ovarian cystic mass (4 cm in size) was detected, and it enlarged to 6 cm two months later (Figure 3).
Histological section showing immature teratoma composed of small immature neurogenic cells (hematoxylin and eosin, 100x magnification).
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The histological diagnosis was an immature teratoma of grade 1 in the right ovary, and metastatic carcinoma was not detected in the other extracted organs (Figures 4 and 5).
Histological section showing the immature teratoma with immature tissue of the bone (asterisk), cartilage (arrow), and islands of adipose tissue (arrowhead) (hematoxylin and eosin, 100x magnification).
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The histological diagnosis was an immature teratoma of grade 1 in the right ovary, and metastatic carcinoma was not detected in the other extracted organs (Figures 4 and 5).