Ruptured corpus luteal cyst
Left lower abdominal pain.
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Moderate amount of high-attenuation fluid (nearing 60 HU) in the rectouterine pouch, consistent with haemorrhagic blood. Small amount around the spleen, in the left paracolic gutter, and beneath the liver (attenuation 30-40 HU).
Cyst with a thick, enhancing wall in the left ovary, showing a discontinuity in its wall, highly suggestive of a ruptured corpus luteal cyst.
Of note, the patient's haemoglobin level was 9.4 g/dL, compared with a baseline of 13 g/dL five years earlier.
The diagnosis of a ruptured corpus luteal cyst was proved intraoperatively.