Table 1 Summary of cases.

From: Methylation profiles of imprinted genes are distinct between mature ovarian teratoma, complete hydatidiform mole, and extragonadal mature teratoma

Histology

n

Age (years)

Tumor size (cm)

  

(mean)

(mean)

Mature ovarian teratoma

12

1–48

4–12

  

(28.9)

(7.8)

Struma ovarii

   

 Typical

5

37–77

4–7

 Resembling follicular adenoma

1

46 (54.3)

7 (6)

Complete hydatidiform mole

10

18–49a (33.1)

Extragonadal teratoma of female

   

 Sacrococcygeal

1

3 daysb

3.5

 Mediastinal

6

13–38 (25)

5–15 (8.1)

  1. aGestational age was 7–15 (mean: 10.1) weeks.
  2. bThis tumor was congenital, and it was resected 3 days after birth.