Thanks for your query.
The possibilities for you include - endometrial hyperplasia
, uterine fibroids, adenomyosis
, uterine polyps.
Given the obesity and PCOS, I would be more in favour of endometrial hyperplasia.
THis is thickening of the lining of the uterus, and frequently appears as a bright spot on ultrasound
Also, the other conditions would be revealed by ultrasound.
Do not worry, as you are too young and healthy to have uterine cancer
a biopsy of the hyperplasia would conclusively rule out risk of malignancy.