The clinical challenge of a uterine cotyledonoid dissecting leiomyoma with adenomyosis: A case report.

Cotyledonoid dissecting leiomyoma (CDL) is a rare uterine tumor with unique clinical and histological features. We present a case of a 46-year-old woman with a 3-month history of left-flank pain radiating to the back. The patient had a history of infertility and a previous miscarriage. Ultrasound revealed a solid tissue mass suggestive of a degenerated fibroid. Laparoscopy identified subserosal leiomyoma and leiomyoma in the broad ligament. Histologically, CDL is characterized by disorganized smooth muscle with hyaline degeneration and no evidence of malignancy. Clinically, CDL can present with a variety of symptoms, including heavy menstrual bleeding, pelvic pain, and infertility. The coexistence of CDL and adenomyosis is exceedingly rare. This case highlights the importance of considering CDL in the differential diagnosis of pelvic mass, malignant neoplasms, and infertility, even with atypical symptoms. It also emphasizes the value of cooperation between clinicians and pathologists for accurate diagnosis and management of CDL. Adenomyosis in this case further complicated the diagnosis and highlighted the need for an index of suspicion for this rare condition.