Uterus

It causes a diffusely enlarged, tender uterus, heavy painful periods and is common in multiparous women over 35.

What our notes say

Study material on Uterus

Images

The "blob sign" of an ectopic pregnancy on transvaginal ultrasound. Mikael Häggström, CC0, Wikimedia Commons
The "blob sign" of an ectopic pregnancy on transvaginal ultrasound. Mikael Häggström, CC0, Wikimedia Commons

Practice questions on Uterus

A 20-year-old woman is unable to conceive and undergoes an infertility workup. A pelvic ultrasound reveals a bicornuate uterus. Which of the following is the most likely explanation for her anomalous uterus?

Answer: C. The paramesonephric (Mullerian) ducts form the uterus, and failure of fusion in the upper portion leaves two cavities, not one. Uterine anomalies account for a small number of cases of infertility, because implantation or growth of the developing embryo is affected. ---

An 18-year-old primigravida measures 18 weeks' gestation on examination. Ultrasound examination shows a uniformly enlarged uterus. Which of the following cellular changes leads to this increase in uterine size?

Answer: A. This cellular hypertrophy of the myometrium of the uterus with increase in cell size (not hyperplasia with increase in cell number) accounts for most of the marked increase in size of the uterus during pregnancy. Following pregnancy and reduction in hormonal stimulation, the uterus returns back to its normal size. ---

The nonpregnant uterus of a 20-year-old woman measures 7 × 4 × 3 cm. The woman becomes pregnant and just before delivery of a term infant, the uterus measures 34 × 18 × 12 cm. Which of the following cellular processes has contributed most to the increase in uterine size?

Answer: D. The increase in uterine size is primarily the result of an increase in myometrial smooth muscle cell size. The endometrium also increases in size, but it remains as a lining to the muscular wall and does not contribute as much to the change in size. ---

ONE of the following is the most likely complication of submucosal fibroids of the uterus.

Answer: A. Submucosal fibroids commonly cause heavy and prolonged menstrual bleeding (menorrhagia) due to their proximity to the endometrial cavity.

A 28-year-old woman presents with pelvic pain and infertility. Laparoscopy reveals multiple blue-black lesions on the ovaries and peritoneum. Histology shows endometrial glands and stroma outside the uterus. What is the most likely diagnosis?

Answer: A. The presence of endometrial glands and stroma outside the uterus (blue-black lesions) is characteristic of endometriosis.

A 35-year-old woman presents with heavy menstrual bleeding and pelvic pressure. Ultrasound reveals multiple well-circumscribed masses in the uterus composed of smooth muscle cells arranged in whorled patterns. Which diagnosis is most likely?

Answer: A. Well-circumscribed masses of smooth muscle in the uterus, arranged in whorled patterns, are characteristic of leiomyomas (fibroids).

Related topics