**Question:** Most common uterine tumor is:-

A. Leiomyoma
B. Endometrial carcinoma
C. Myxoma
D. Ectopic pregnancy

**Core Concept:**
Uterine tumors can be broadly classified into benign and malignant tumors. Benign tumors are further categorized as either stromal or epithelial tumors. Stromal tumors include leiomyomas, endometrial stromal sarcomas, and clear cell carcinomas. Epithelial tumors include endometrial adenocarcinomas and teratomas.

**Why the Correct Answer is Right:**
The correct answer, A. Leiomyoma, is a benign uterine tumor originating from smooth muscle cells of the myometrium. Leiomyomas are the most common uterine tumor, accounting for approximately 70% of all uterine tumors. They commonly present as submucosal, intramural, or subserosal tumors, depending on their location within the uterus.

**Why Each Wrong Option is Incorrect:**

B. Endometrial carcinoma: This is a malignant tumor originating from the endometrial epithelium, making it the wrong answer because it is a cancerous tumor, not a benign one.

C. Myxoma: A benign tumor originating from the myxoid tissue, myxomas are found in various locations throughout the body but are not common in the uterus. This makes it an incorrect choice.

D. Ectopic pregnancy: An ectopic pregnancy is a pregnancy occurring outside the uterine cavity, usually in the fallopian tubes. Ectopic pregnancies are not uterine tumors and should be distinguished from uterine tumors.

**Clinical Pearl:**
Thorough knowledge of uterine tumors and their characteristics is essential for accurate diagnosis and management of patients presenting with abnormal uterine bleeding or pelvic masses. Understanding the histopathological classification and clinical presentation of these tumors is crucial for practicing physicians.