large cystic lesion, CT pelvis scan showing a large cystic lesion, a complex hemorrhagic cyst. On CT.

This is an axial CT pelvis scan showing a large cystic lesion arising from the adnexal region (likely ovary). The cyst shows:

• A well-defined fluid density lesion with some internal complexity / septation-like appearance.

• No obvious solid enhancing component in this slice (which is good, as solid nodules raise suspicion for malignancy).

• The uterus is displaced, and bowel loops are seen superiorly.

This appearance is consistent with a large ovarian cyst, possibly a complex hemorrhagic cyst.
On CT alone, differentiation from endometrioma, cystadenoma, or neoplasm can sometimes be difficult — usually pelvic ultrasound or MRI is better for characterization.

complex hemorrhagic cyst.
On CT

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✅ Next Steps (Clinically)

1. Ultrasound pelvis (TVS/TAUS) → to check internal vascularity, septations, clot, or nodules.

2. MRI pelvis → if US is indeterminate (better for blood products and complex cysts).

3. Tumor markers (CA-125, CEA, CA 19-9, AFP, β-hCG, LDH) if malignancy needs to be excluded.

4. Management

   • If asymptomatic + cyst <5 cm → observation with follow-up imaging.

   • If large (>5–6 cm), persistent, painful, or suspicious → laparoscopic cystectomy or oophorectomy.

   • Emergency surgery if rupture, torsion, or hemodynamic instability.