**3. Low-grade serous ovarian carcinomas (LGSCs)**

Low-grade serous carcinomas (LGSCs*)* are more common in younger women, with a median age of 43 years, have a better clinical course and prognosis than HGSCs and account for approximately 3–5% of epithelial ovarian tumours [67]. LSGCs originate from benign or borderline serous tumours and about 50% are associated with a borderline component. Progression of borderline serous tumour into low-grade serous carcinoma occurs in 6–7% of the cases and evolution to high grade serous carcinoma is rare. A more aggressive clinical course is associated with the presence of a borderline serous tumour component showing micropapillary histological pattern, microinvasions and bilateral ovarian presence [68].
