Focal adenomyosis most commonly occurs at the fundal endometrial-myometrial interface 7.
Radiographic features
Ultrasound
May be seen as a focal area of myometrial thickening. It may also present as a heterogeneous, mildly echogenic focal nodule with indistinct margins and cystic spaces 5. On color Doppler, tortuous vessels are typically seen coursing through the abnormality 7.
MRI
It is typically seen as a localized, low-signal-intensity region within the myometrium on both T2-weighted and contrast-enhanced T1-weighted sequences 1. This region is often continuous with the junctional zone.
1. Woodfield C, Siegelman E, Coleman B, Torigian D. CT Features of Adenomyosis. Eur J Radiol. 2009;72(3):464-9. doi:10.1016/j.ejrad.2008.08.002 - Pubmed
2. Berry. Diagnostic Radiology. (2003) ISBN: 9788180610455 - Google Books
3. Bernd Hamm, Rosemarie Forstner. MRI and CT of the Female Pelvis. (2006) ISBN: 9783540222897 - Google Books
6. Hulka C, Hall D, McCarthy K, Simeone J. Sonographic Findings in Patients with Adenomyosis: Can Sonography Assist in Predicting Extent of Disease? AJR Am J Roentgenol. 2002;179(2):379-83. doi:10.2214/ajr.179.2.1790379 - Pubmed
7. Cunningham R, Horrow M, Smith R, Springer J. Adenomyosis: A Sonographic Diagnosis. Radiographics. 2018;38(5):1576-89. doi:10.1148/rg.2018180080 - Pubmed
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