Table 1.

The International Federation of Gynecology and Obstetrics (FIGO) classification of fibroids.

	Type	Location
Submucosal	0	Pedunculated intracavitary
	1	<50% intramural
Intramural	2	≥50% intramural
	3	Contact with the endometrium, 100% intramural
	4
	5	Intramural Subserosal ≥50% intramural
Subserosal	6	Subserosal <50% intramural
	7	Subserosal pedunculated
	8	Other (e.g., cervical, intraligamentous).
Hybrid (having contact with both the endometrium and the serosal layer). The numbers are listed separately with a hyphen. The first refers to the relationship with the endometrium, and the second refers to the relationship with the serosa.	2–5	Submucosal and subserosal, each with less than half the diameter in the endometrial and peritoneal cavities, respectively.