Diagnostic Approach for Abnormal Uterine Bleeding in Elderly Females

Initial Evaluation

The American College of Radiology recommends obtaining combined transabdominal and transvaginal ultrasound with Doppler as the most appropriate initial imaging study for elderly females with abnormal uterine bleeding 1, 3
In postmenopausal women, endometrial thickness <4 mm has nearly 100% negative predictive value for cancer 1
Perform a complete speculum examination to determine if the protrusion originates from the cervical canal versus the endometrial cavity 1
Assess whether the lesion is pedunculated (suggesting polyp) versus sessile/friable (concerning for malignancy) 1

Endometrial polyps can prolapse through the cervical os, appearing as smooth, elongated masses 4, 5
Endometrial cancer is the most serious etiology and becomes the primary focus of evaluation in postmenopausal women with abnormal uterine bleeding 2
Endometrial thickness ≥5 mm on transvaginal ultrasound generally prompts endometrial tissue sampling in postmenopausal women 2
Submucosal fibroids can become pedunculated and prolapse through the cervix 4
Saline infusion sonohysterography (SIS) distinguishes between leiomyomas and endometrial polyps with 97% accuracy 4, 1

Endometrial biopsy is required for perimenopausal/postmenopausal women with abnormal uterine bleeding 3
Refer to gynecology immediately if endometrial thickness ≥4 mm with persistent bleeding after initial management 3
Consider urgent referral if the lesion appears friable, necrotic, or otherwise suspicious for malignancy 2