Table 2.

Classification and reporting for sonographic features of adenomyosis.

Location	Anterior Posterior Right lateral Left lateral Fundal	Described according to location
Distribution	Focal	25% or more of the lesion is surrounded by normal endometrium. When focal adenomyosis is formed by invasion from outside to inside, it is referred to as Focal Adenomyosis of the Outer Myometrium (FOAM)
	Adenomyoma	The lesion is demarcated distinctly and is totally surrounded by hypertrophic myometrium
	Diffuse
	Mixed	Both focal and diffuse disease is present
Presence of cysts	Cystic/noncystic	Presence or absence of intramyometrial cysts measuring 2 mm or more
Layer of uterine involvement	Type 1	Involvement of the junctional zone
	Type 2	Involvement of the middle myometrium
	Type 3	Involvement of the outer myometrium. Demarcation between the middle and outer myometrium is determined by using color Doppler to delineate the vascular arcade
	Multiple layers	Described as Type 1‐2, 1‐3, etc.
Extent	Mild	<25% affected
	Moderate	25%–50% affected
	Severe	>50% affected
Lesion size	Lesion/s is/are measured in their longest diameter/s