Adenomyosis on MRI is characterised by which of the following findings?
- A Thickened endometrium with polypoidal projections
- B High signal intensity subendometrial cysts on T1W imaging
- C Junctional zone thickness ≥12 mm with low signal intensity foci in the myometrium on T2W imaging ✓
- D Hyperintense myometrial lesion on T2W imaging with whorled appearance
Correct answer: C. Junctional zone thickness ≥12 mm with low signal intensity foci in the myometrium on T2W imaging
Explanation
Adenomyosis on MRI is diagnosed by: junctional zone (JZ) thickness ≥12 mm on T2-weighted imaging; a JZ/total myometrial thickness ratio >40%; and punctate high-signal foci (ectopic endometrial glands/haemorrhage) on T1 or T2 within the low-signal myometrium. A whorled hyperintense lesion describes fibroid (leiomyoma). Endometrial polyps present as thickened endometrium with polypoidal projections. T1W high-signal cysts in the ovary suggest endometriomas, not adenomyosis.
Reference: Shaw's Textbook of Gynaecology, 17th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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