Objective: To study the spectrum of lesions in non pregnant women of reproductive age group presenting with abnormal uterine bleeding in Kumaon region. Study Method: A two year prospective cross sectional study was carried out from September 2013September 2015 in the Department of Pathology and Department of Obstetrics & Gynaecology, Government Medical College, Haldwani and associated Dr. Sushila Tiwari Memorial Hospital, Haldwani. Data was obtained from patient’s proforma which included age, parity, presenting symptoms , bleeding pattern and clinical indication for hysterectomy. The specimens were studied grossly and thereafter processed and stained with hematoxylin & eosin stain for microscopic examination. Results: Majority of lesions were benign in nature (99.6%) while malignant lesions comprised of a very small percentage (0.4%) .The most common age group that presented with AUB was perimenopausal age group ( 40 44 years) that comprised of 65.6% of the total cases. Most common lesion encountered was adenomyosis seen in 67 cases (26.8%) followed by leiomyoma seen in 45 cases (18%) which was the second most common singly occurring lesion. Heavy menstrual bleeding (HMB) was the most common bleeding pattern encountered in our study accounting for 75.6% cases. Clinopathological correlation was seen in 95.6% cases of leiomyoma while it was only 71.6% for adenomyosis.

Keywords: Abnormal Uterine Bleeding; Adenomyosis; Leiomyoma; Heavy Menstrual Bleeding.