Pelvis and Perineum Practice Questions

Q: The inferior rectal artery is a branch of :

Internal pudendal artery. ***Internal pudendal artery*** - The **inferior rectal artery** is a key branch of the **internal pudendal artery**, supplying blood to the anal canal below the pectinate line. - This artery typically arises in the **ischioanal fossa** (also known as the ischiorectal fossa), providing vascularization to the external anal sphincter and perineal skin. *Inferior mesenteric artery* - The **inferior mesenteric artery** is responsible for supplying large intestine structures from the distal transverse colon to the superior part of the rectum [1]. - Its main branches are the **left colic artery**, **sigmoid arteries**, and **superior rectal artery**, none of which directly give rise to the inferior rectal artery [1]. *Internal iliac artery* - The **internal iliac artery** is a large artery that supplies many pelvic organs and the perineum; it gives off the **internal pudendal artery** as one of its terminal branches. - While it is the source of the internal pudendal artery, it does not directly branch into the inferior rectal artery. *Median sacral artery* - The **median sacral artery** is a small, unpaired artery that arises from the posterior aspect of the abdominal aorta just above its bifurcation. - It supplies structures in the posterior pelvic wall, such as the sacrum, coccyx, and adjacent posterior muscles but has no direct connection to the inferior rectal artery.

Q: Which of the following are correct regarding pelvic cellular tissue? 1. It supports the pelvic organs. 2. It forms protective sheath for blood vessels and terminal part of ureter. 3. It prevents infection to be spread out of pelvis. 4. Marked hypertrophy of pelvic cellular tissue occurs in pregnancy. Select the answer using the code given below.

1, 2 and 4. ***1, 2 and 4*** - Pelvic cellular tissue (parametrium/paracervix) provides crucial **structural support** to the uterus, cervix, and bladder, preventing **pelvic organ prolapse** (Statement 1 is correct) [1]. - It forms a **protective sheath** around important structures including the **uterine vessels** and **terminal portions of the ureters**, safeguarding them from injury (Statement 2 is correct) [1]. - During **pregnancy**, the parametrium undergoes **marked hypertrophy and hyperplasia** with increased vascularity to accommodate and support the enlarging uterus and increased blood flow (Statement 4 is correct) [2]. - Statement 3 is **incorrect** because pelvic cellular tissue does NOT prevent infection spread; rather, it is a **loose connective tissue space** that can serve as a **pathway for infection dissemination** within the pelvis (parametritis, pelvic cellulitis) [1]. *1, 2 and 3* - This combination incorrectly includes Statement 3. The pelvic cellular tissue actually facilitates infection spread rather than preventing it from spreading out of the pelvis [1]. *1, 3 and 4* - Statement 3 is incorrect as explained above. The loose areolar tissue of the parametrium is a potential space for infection spread, not a barrier [1]. *2, 3 and 4* - While statements 2 and 4 are correct [1], [2], Statement 3 is incorrect, and this option omits Statement 1, which is clearly correct regarding structural support.

Q: Uterus is supported by which of the following ligaments? 1. Pubocervical ligament 2. Cardinal ligament 3. Uterosacral ligament 4. Ovarian ligament.

1, 2 and 3. ***1, 2 and 3*** - The **Pubocervical**, **Cardinal**, and **Uterosacral ligaments** are collectively known as the **endopelvic fascia** or **true ligaments** of the uterus, providing primary support [1]. - These ligaments attach the cervix and uterus to the pelvic walls, preventing uterine prolapse [1]. *2, 3 and 4* - This option incorrectly includes the **ovarian ligament** as a primary uterine support, while excluding the critical **pubocervical ligament**. - The ovarian ligament mainly connects the ovary to the uterus and does not offer significant structural support for the uterus itself. *1, 2 and 4* - This choice incorrectly excludes the **uterosacral ligament**, which is a key component of the primary uterine support system [1]. - The uterosacral ligaments contribute to posterior uterine support and help maintain its anteverted position [1]. *1, 3 and 4* - This option omits the **cardinal ligament** (also known as Mackenrodt's ligament), which is one of the most crucial supports for the uterus, stabilizing the cervix laterally [1]. - The cardinal ligaments are rich in connective tissue and provide significant lateral structural support [1].

Q: The following are the branches of the anterior division of internal iliac artery except

Superior rectal artery. ***Superior rectal artery*** - This artery is a direct continuation of the **inferior mesenteric artery**, which is a branch of the **abdominal aorta**, not the internal iliac artery. - It supplies the **superior part of the rectum** and is not associated with the internal iliac artery's divisions. *Inferior vesical artery* - This artery typically arises from the **anterior division of the internal iliac artery** and supplies the **bladder** and male reproductive organs. - It is a correct branch of the anterior division, making it an incorrect answer to the "except" question. *Uterine artery* - The **uterine artery** is a significant branch of the **anterior division of the internal iliac artery** in females. - It supplies the **uterus**, vagina, and surrounding structures, confirming its origin from the anterior division. *Middle rectal artery* - This artery originates from the **anterior division of the internal iliac artery** and supplies the **middle portion of the rectum**. [1] - It is a recognized branch of the anterior division, so it is not the exception.

Q: Before puberty, what is the ratio between the cervical length and uterine body?

2 : 1. **2:1 (Correct Answer)** - Before puberty, the **cervix** is proportionally much longer than the **uterine body**, with a typical ratio of 2:1 (cervix:body) [1]. - This anatomical ratio changes significantly after puberty due to hormonal influences causing the uterine body to grow more rapidly. *1:2 (Incorrect)* - This ratio of 1:2, where the uterine body is longer than the cervix, is characteristic of the **post-pubertal** and **reproductive years** [1]. - It reflects the increased growth and development of the uterine corpus under the influence of hormones like **estrogen**. *1:3 (Incorrect)* - This ratio is not typical at any stage of uterine development, as the uterine body generally does not become three times the length of the cervix. - It represents an **unusual disproportion** in uterine-cervical length. *1:4 (Incorrect)* - This ratio is also not a standard physiological proportion for uterine-cervical length at any developmental stage. - Such an extreme disproportion would likely indicate an **anomalous uterine development**.

Q: The true conjugate of the pelvic brim measures

11.5 cm. ***11.5 cm*** - The **true conjugate (conjugata vera)** is the anteroposterior diameter of the pelvic inlet, measured from the **posterior superior margin** of the pubic symphysis to the sacral promontory. [1] - It typically measures **11 cm** (range 10.5-11.5 cm), making 11.5 cm the most accurate answer among the given options. [1] - The true conjugate **cannot be measured clinically** but can be estimated by subtracting 1.5 cm from the diagonal conjugate. [1] - It is **distinct from** the obstetric conjugate, which is slightly shorter at 10.5 cm. *10.5 cm* - This measurement corresponds to the **obstetric conjugate**, not the true conjugate. - The obstetric conjugate is measured from the **most prominent point** on the posterior surface of the pubic symphysis (not the superior margin) to the sacral promontory. - While clinically important as the shortest fixed AP diameter through which the fetal head must pass, it is a **different measurement** from the true conjugate. *12.5 cm* - This value corresponds to the **diagonal conjugate**, which is the only conjugate diameter that can be measured clinically. - It is measured from the **lower border** of the symphysis pubis to the sacral promontory during pelvic examination. - The true conjugate is estimated by subtracting 1.5-2 cm from the diagonal conjugate (12.5 - 1.5 = 11 cm). *13.5 cm* - This measurement is considerably **larger** than any standard pelvic conjugate diameter. - It does not correspond to any clinically relevant pelvic measurement and would represent an unusually spacious pelvic inlet.

Q: Which one of the following is not a branch of internal iliac artery?

Ovarian artery. Ovarian artery - The ovarian artery typically originates directly from the abdominal aorta, usually below the renal arteries. - It does not branch off the internal iliac artery, making it the correct answer. *Superior gluteal* - The superior gluteal artery is a parietal branch of the internal iliac artery, supplying muscles in the gluteal region. - It exits the pelvis through the greater sciatic foramen, superior to the piriformis muscle. *Inferior gluteal* - The inferior gluteal artery is also a parietal branch of the internal iliac artery, supplying the buttocks and posterior thigh. - It usually accompanies the sciatic nerve and exits through the greater sciatic foramen, inferior to the piriformis muscle. *Uterine artery* - The uterine artery is a visceral branch of the internal iliac artery, primarily supplying the uterus. - It is critical for female reproductive health and forms important anastomoses with the ovarian and vaginal arteries.

Q: The blood supply of uterus is from: 1. Uterine artery 2. Ovarian artery 3. Pudendal artery 4. Superior vesical artery Select the correct answer using the code given below:

1 and 2. Option A: 1 and 2 - The uterine artery, a branch of the internal iliac artery, is the primary blood supply to the uterus [1]. - The ovarian artery, a direct branch from the abdominal aorta, also contributes to uterine blood supply by anastomosing with the uterine artery [1]. Option B: 1 and 3 - While the uterine artery is a primary source, the pudendal artery supplies the external genitalia and perineum, not the uterus directly. - The pudendal artery's territory is distinct from the uterine circulation. Option C: 2 and 4 - The ovarian artery does supply the uterus [1], but the superior vesical artery primarily supplies the superior portion of the urinary bladder. - The superior vesical artery does not significantly contribute to uterine vascularization. Option D: 3 and 4 - Neither the pudendal artery nor the superior vesical artery are direct or significant suppliers of blood to the uterus. - Their primary supply territories are the perineum/external genitalia and the bladder, respectively.

Q: The following are the contents of broad ligament EXCEPT:

Internal iliac artery. ***Internal iliac artery*** - The **internal iliac artery** is a large pelvic artery supplying various pelvic organs and **does NOT traverse within the broad ligament itself**. [2] - While its branches (like the uterine artery) enter the broad ligament, the main trunk of the internal iliac artery is located more posteriorly and laterally on the **pelvic sidewall**, outside the broad ligament. [1] - This is the correct answer to this EXCEPT question. *Uterine and ovarian arteries with their branches* - These **ARE contents of the broad ligament**, making this option incorrect. [1] - The **uterine artery** travels within the base of the broad ligament (cardinal ligament region), providing blood supply to the uterus. [2] - The **ovarian artery** travels within the suspensory ligament of the ovary, which is a lateral fold of the broad ligament, to supply the ovary. [1] *Fallopian tube* - This **IS a content of the broad ligament**, making this option incorrect. [3] - The **fallopian tube** (uterine tube) is enclosed within the superior free margin of the broad ligament, specifically within the **mesosalpinx** (the portion of broad ligament between fallopian tube and ovary). [1] - It extends laterally from the uterus, providing a pathway for ova. *Ovarian ligament* - This **IS a content of the broad ligament**, making this option incorrect. - The **ovarian ligament** is a fibrous cord that connects the medial pole of the ovary to the lateral aspect of the uterus, running within the posterior layer of the broad ligament. [3] - It helps to anchor the ovary to the uterus.

Question 1

The inferior rectal artery is a branch of :

Accepted Answer

Internal pudendal artery

Answer

Inferior mesenteric artery

Answer

Internal iliac artery

Answer

Median sacral artery

Question 2

Which of the following are correct regarding pelvic cellular tissue?

1. It supports the pelvic organs.
2. It forms protective sheath for blood vessels and terminal part of ureter.
3. It prevents infection to be spread out of pelvis.
4. Marked hypertrophy of pelvic cellular tissue occurs in pregnancy. Select the answer using the code given below.

Accepted Answer

1, 2 and 4

Answer

1, 2 and 3

Answer

1, 3 and 4

Answer

2, 3 and 4

Question 3

Uterus is supported by which of the following ligaments?

1. Pubocervical ligament
2. Cardinal ligament
3. Uterosacral ligament
4. Ovarian ligament.

Accepted Answer

1, 2 and 3

Answer

2, 3 and 4

Answer

1, 2 and 4

Answer

1, 3 and 4

Question 4

The following are the branches of the anterior division of internal iliac artery except

Accepted Answer

Superior rectal artery

Answer

Inferior vesical artery

Answer

Uterine artery

Answer

Middle rectal artery

Question 5

Before puberty, what is the ratio between the cervical length and uterine body?

Accepted Answer

2 : 1

Answer

1 : 2

Answer

1 : 3

Answer

1 : 4

Question 6

The true conjugate of the pelvic brim measures

Accepted Answer

11.5 cm

Answer

12.5 cm

Answer

13.5 cm

Answer

10.5 cm

Question 7

Which one of the following is not a branch of internal iliac artery?

Accepted Answer

Ovarian artery

Answer

Superior gluteal artery

Answer

Inferior gluteal artery

Answer

Uterine artery

Question 8

Which of the following regarding blood supply of rectum is NOT true?

Accepted Answer

Middle rectal artery arises from external iliac artery and passes through the lateral ligaments into rectum

Answer

Superior rectal artery is a direct continuation of Inferior mesenteric artery

Answer

Inferior rectal artery arises from internal pudendal artery

Answer

Inferior rectal artery traverses the Alcock’s canal into rectum

Question 9

The blood supply of uterus is from:

1. Uterine artery
2. Ovarian artery
3. Pudendal artery
4. Superior vesical artery

Select the correct answer using the code given below:

Accepted Answer

1 and 2

Answer

1 and 3

Answer

2 and 4

Answer

3 and 4

Question 10

The following are the contents of broad ligament EXCEPT:

Accepted Answer

Internal iliac artery

Answer

Uterine and ovarian arteries with their branches

Answer

Fallopian tube

Answer

Ovarian ligament

Pelvis and Perineum — MCQs

Pelvis and Perineum — MCQs

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