- A haemorrhagic ovarian cyst is a common type of functional ovarian cyst caused by bleeding in a follicular or corpus luteum cyst, often leading to one-sided acute pelvic pain and possible menstrual issues.
- Diagnosis is made through pelvic ultrasound, showing a complex cyst with a distinct reticular or 'lace-like' pattern.
- Most cases resolve on their own with minimal treatment, but serious complications like rupture may require surgery, and some cysts can have unusual presentations that complicate diagnosis.