According to the FIGO 2014 staging system for ovarian cancer, a tumour limited to one ovary with positive peritoneal washings is staged as:

• A Stage IA
• B Stage IC1
• C Stage IIA
• D Stage IC3 ✓

Explanation

FIGO 2014 sub-stages Stage I ovarian cancer as: IC1 — surgical spill, IC2 — capsule rupture preoperatively or tumour on ovarian surface, IC3 — malignant cells in peritoneal washings or ascites. Positive peritoneal washings in a unilateral tumour therefore corresponds to Stage IC3. Stage IA is intact capsule, negative washings; Stage IIA implies extension to fallopian tubes or uterus.

Reference: Shaw's Textbook of Gynaecology, 17th ed.

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