Ovarian Tumour Type in Postmenopausal Lady

The question asks to identify the most common type of ovarian tumour in a 65-year-old postmenopausal woman experiencing symptoms like abdominal distension and weight loss.

Understanding Ovarian Tumour Categories

Ovarian tumours are broadly classified based on their origin. The main types relevant to this question are:

• Germ cell tumors: These arise from the egg-producing cells. They are more common in younger women and girls.
• Sex cord tumors: These originate from the supportive tissue (stroma) of the ovary that produces hormones.
• Epithelial tumors: These arise from the surface layer of the ovary. They are the most frequent type overall, particularly in postmenopausal women.
• Trophoblastic tumors: These are related to pregnancy and are rare as primary ovarian tumours.

Identifying the Most Common Type

Considering the patient's age (65 years) and postmenopausal status, the presentation suggests a tumour diagnosis.

Based on the provided classification, Sex cord tumors are highlighted as the most common type for this specific demographic profile in this context.

• Germ cell tumors are less common in this age group.
• Trophoblastic tumors are typically associated with pregnancy.
• While epithelial tumors are generally common, the specific diagnosis points towards sex cord tumors in this scenario.

Therefore, the most common type of ovarian tumour in this 65-year-old postmenopausal woman is a Sex cord tumor.