Pelvis and Perineum Practice Questions

Q: Lymphatic drainage of cervix is to

Iliac lymph nodes. ***Iliac lymph nodes*** - The primary lymphatic drainage of the cervix is to the **internal**, **external**, and **common iliac lymph nodes**. - This pathway is crucial for understanding the spread of **cervical cancer**. *Para-aortic lymph nodes* - While sometimes involved in advanced cases, the **para-aortic nodes** are typically considered a secondary drainage site, usually after the iliac nodes are affected. - They are the primary drainage for organs like the **ovaries** and **testes**. *Deep inguinal lymph nodes* - These nodes primarily drain structures of the **lower limb** and some external genital areas, but not the cervix directly. - They are located deeper in the groin region, distinct from the internal pelvic drainage. *Superficial inguinal lymph nodes* - These nodes drain the **skin of the lower abdomen**, perineum, and external genitalia, as well as the lower limbs. - They do not receive direct lymphatic drainage from the **cervix**.

Q: Anal valve is found in which part of anal canal?

Middle. ***Middle*** - The **anal valves** are crescentic folds located at the level of the **pectinate (dentate) line** in the middle portion of the anal canal. - They mark the inferior limit of the **anal columns** and form small recesses called **anal sinuses**. *Lower* - The lower part of the anal canal, below the pectinate line, is lined by **anoderm** and lacks anal valves. - This region is sensitive to pain due to somatic innervation. *At anus* - The anus refers to the external opening and perianal skin, which does not contain anal valves. - The anal canal transitions into the perianal skin at the anocutaneous line. *Upper* - The upper part of the anal canal, above the pectinate line, contains the **anal columns (columns of Morgagni)** but not the anal valves themselves, which are located at the base of these columns. - This region is lined by columnar epithelium and is relatively insensitive to pain.

Q: Ovarian fossa is formed by all except?

Round ligament of ovary. ***Round ligament of ovary*** - The **round ligament of ovary** (ovarian ligament) connects the ovary to the lateral wall of the uterus and does NOT form any boundary of the ovarian fossa [1]. - It lies medial to the ovary and is not involved in forming the depression of the ovarian fossa [1]. - This ligament anchors the ovary but is separate from the peritoneal boundaries defining the fossa [1]. *Obliterated umbilical artery* - The **obliterated umbilical artery** (medial umbilical ligament) forms the **anterior boundary** of the ovarian fossa [2]. - This is a key anatomical landmark running along the lateral pelvic wall anterior to the ovary [2]. *Internal iliac artery* - The **internal iliac artery** forms the **posterior boundary** of the ovarian fossa [2]. - It lies on the lateral pelvic wall, deep and posterior to the ovarian fossa [2]. - This is one of the main structures defining the fossa's posterior limit [2]. *Ureter* - The **ureter** runs along the lateral pelvic wall and forms part of the **posterior/floor boundary** of the ovarian fossa [2]. - It passes posteroinferior to the ovary, contributing to the fossa's posterior limits [2].

Q: Where is the Bartholin gland situated?

Superficial perineal pouch. ***Superficial perineal pouch*** - The **Bartholin glands** are located posterolateral to the vaginal orifice within the boundaries of the **superficial perineal pouch** [1]. - They are covered by the **bulbospongiosus muscle** and their ducts open into the vestibule of the vagina [1]. *Deep perineal pouch* - This pouch contains structures like the **urethra**, part of the **vagina**, and the **deep transverse perineal muscle**, but not the Bartholin glands [2]. - It is located superior to the superficial perineal pouch and separated by the **perineal membrane**. *Inguinal canal* - The **inguinal canal** is a passage in the anterior abdominal wall that transmits the **round ligament of the uterus** in females and the **spermatic cord** in males. - It is anatomically distinct from the perineum and does not house the Bartholin glands. *Ischiorectal fossa* - The **ischiorectal fossae** are fat-filled spaces located lateral to the anal canal, inferior to the levator ani muscles. - They are known for their susceptibility to abscess formation but do not contain the Bartholin glands.

Q: Waldeyer's fascia lies?

Behind the rectum.. ***Behind the rectum*** - **Waldeyer’s fascia**, also known as the **sacrorectal fascia**, is a retrorectal connective tissue sheet located between the **rectum** and the **sacrum**. - It plays a crucial role in supporting the rectum and forms part of the posterior rectosacral space, separating the rectum from the sacral bone and nerves. *In front of the bladder* - The space in front of the bladder is typically referred to as the **retropubic space of Retzius**, containing loose connective tissue and fat. - No specific fascial layer named Waldeyer's fascia is located in this anterior position relative to the bladder. *Between the bladder and uterus* - This space, known as the **vesicouterine pouch** or **anterior cul-de-sac**, is a peritoneal reflection between the bladder and the uterus [1]. - It does not contain a structure known as Waldeyer's fascia. *Between the uterus and rectum* - This space is the **rectouterine pouch** or **Pouch of Douglas**, which is the deepest part of the peritoneal cavity in females [2]. - While important surgically, it does not correspond to the location of Waldeyer's fascia.

Q: Which of the following branches of the internal iliac artery has the LEAST contribution to the blood supply of the ureter?

Superior vesicular artery. ***Superior vesical artery*** - The superior vesical artery primarily supplies the **superior part of the urinary bladder** [1] and, in males, the **ductus deferens**. - While it may occasionally provide **minor branches to the distal ureter** near the bladder, its contribution to the overall ureteral blood supply is **minimal and inconsistent**. - Among the options listed, it has the **least recognized contribution** to the ureter, as its primary focus is vesical (bladder) supply. *Middle rectal artery* - The middle rectal artery supplies the **middle and inferior rectum**, **prostate** (in males), and **seminal vesicles**. - It provides **recognized branches to the distal ureter**, particularly in the pelvic region, forming part of the collateral vascular network. - This contribution is more consistent than that of the superior vesical artery. *Vaginal artery* - The vaginal artery (in females) is a **major contributor** to the blood supply of the **distal ureter**, along with the vagina, bladder base, and rectum. - It is the female equivalent of the inferior vesical artery (in males), both of which are **primary sources** of distal ureteral blood supply. - This is the most significant contributor among the options in females. *Obturator artery* - The obturator artery primarily supplies the **medial thigh muscles** and **hip joint**. - It may send **small variable branches** to the pelvic ureter during its course through the pelvis [2], but this is more consistent than the superior vesical contribution. - It provides recognized, though minor, supply to the pelvic portion of the ureter.

Q: Which of the following structures does not pass through the greater sciatic foramen?

Obturator nerve. ***Obturator nerve*** - The **obturator nerve** passes through the **obturator foramen** into the medial compartment of the thigh, not the greater sciatic foramen. - Its primary function is to innervate the **adductor muscles** of the thigh and provide sensory innervation to the medial thigh. *Piriformis* - The **piriformis muscle** passes through the **greater sciatic foramen**, dividing it into suprapiriform and infrapiriform spaces. - It runs from the anterior surface of the **sacrum** to the greater trochanter of the femur. *Superior gluteal nerve* - The **superior gluteal nerve** passes through the **suprapiriform part** of the greater sciatic foramen. - It innervates the **gluteus minimus**, **gluteus medius**, and **tensor fasciae latae muscles**. *Inferior gluteal nerve* - The **inferior gluteal nerve** passes through the **infrapiriform part** of the greater sciatic foramen. - It specifically innervates the **gluteus maximus muscle**.

Q: Occlusion of which artery would result in insufficient perfusion of the urinary bladder?

Internal iliac. ***Internal iliac*** - The **internal iliac artery** is the primary source of blood supply to the pelvic organs, including the urinary bladder, through its anterior division branches like the superior and inferior vesical arteries [2]. - Occlusion of this artery would directly compromise the blood flow necessary for bladder perfusion [2]. *External iliac* - The **external iliac artery** primarily supplies the lower limbs and does not directly contribute to the perfusion of the urinary bladder. - Its branches, such as the inferior epigastric and deep circumflex iliac arteries, supply structures of the abdominal wall and lower limb [1]. *Renal* - The **renal arteries** supply the kidneys and adrenal glands, with no direct contribution to the vascularization of the urinary bladder. - Occlusion of a renal artery would affect kidney function, not bladder perfusion. *Suprarenal* - The **suprarenal arteries** (superior, middle, and inferior) supply the adrenal glands located superior to the kidneys. - They are not involved in the blood supply to the urinary bladder.

Q: Which of the following structures does not cross the dorsal surface of the ischial spine?

Obturator nerve. ***Obturator nerve*** - The **obturator nerve** passes through the **obturator foramen** to supply the medial compartment of the thigh, and therefore does not interact with the ischial spine. - It arises from the **lumbar plexus (L2-L4)** and descends anterior to the sacroiliac joint. *Internal pudendal vessel* - The **internal pudendal artery and vein** exit the pelvis through the greater sciatic foramen, wrap around the **ischial spine**, and re-enter the pelvis through the lesser sciatic foramen. - They lie in close proximity to the ischial spine as they traverse this path to reach the perineum. *Pudendal nerve* - The **pudendal nerve (S2-S4)** also exits the greater sciatic foramen, loops around the **ischial spine**, and enters the lesser sciatic foramen to innervate the perineum. - This anatomical relationship makes it susceptible to injury during procedures involving the ischial spine, such as sacral nerve stimulation. *Nerve to obturator internus* - The **nerve to obturator internus** exits the pelvis via the greater sciatic foramen, crosses the posterior aspect of the **ischial spine**, and then enters the lesser sciatic foramen to supply the obturator internus muscle. - This nerve is often injured during pelvic trauma or certain surgical procedures.

Q: All of the following are contents of the deep perineal pouch EXCEPT:

Bulb of penis. ***Bulb of penis*** - The **bulb of the penis** is part of the **erectile tissue** located in the **superficial perineal pouch**, not the deep perineal pouch. - It lies inferior to the perineal membrane and is therefore NOT a content of the deep perineal pouch. *External urethral sphincter* - The **external urethral sphincter** (sphincter urethrae) is a **skeletal muscle** that surrounds the **membranous urethra** within the **deep perineal pouch**. - It provides voluntary control of urination. *Bulbourethral glands* - The **bulbourethral glands (Cowper's glands)** are located within the **deep perineal pouch** in males. - They lie posterolateral to the membranous urethra and secrete pre-ejaculate fluid. *Dorsal nerve of penis* - The **dorsal nerve of the penis** (terminal branch of the pudendal nerve) passes through the **deep perineal pouch** before reaching the dorsum of the penis. - It provides sensory innervation to the penile skin.

Question 1

Lymphatic drainage of cervix is to

Accepted Answer

Iliac lymph nodes

Answer

Para-aortic lymph nodes

Answer

Deep inguinal lymph nodes

Answer

Superficial inguinal lymph nodes

Question 2

Anal valve is found in which part of anal canal?

Accepted Answer

Middle

Answer

Lower

Answer

At anus

Answer

Upper

Question 3

Ovarian fossa is formed by all except?

Accepted Answer

Round ligament of ovary

Answer

Internal iliac artery

Answer

Ureter

Answer

Obliterated umbilical artery

Question 4

Where is the Bartholin gland situated?

Accepted Answer

Superficial perineal pouch

Answer

Deep perineal pouch

Answer

Inguinal canal

Answer

Ischiorectal fossa

Question 5

Waldeyer's fascia lies?

Accepted Answer

Behind the rectum.

Answer

In front of the bladder.

Answer

Between the bladder and uterus.

Answer

Between the uterus and rectum.

Question 6

Which of the following branches of the internal iliac artery has the LEAST contribution to the blood supply of the ureter?

Accepted Answer

Superior vesicular artery

Answer

Middle rectal artery

Answer

Vaginal artery

Answer

Obturator artery

Question 7

Which of the following structures does not pass through the greater sciatic foramen?

Accepted Answer

Obturator nerve

Answer

Piriformis

Answer

Superior gluteal nerve

Answer

Inferior gluteal nerve

Question 8

Occlusion of which artery would result in insufficient perfusion of the urinary bladder?

Accepted Answer

Internal iliac

Answer

External iliac

Answer

Renal

Answer

Suprarenal

Question 9

Which of the following structures does not cross the dorsal surface of the ischial spine?

Accepted Answer

Obturator nerve

Answer

Internal pudendal vessel

Answer

Pudendal nerve

Answer

Nerve to obturator internus

Question 10

All of the following are contents of the deep perineal pouch EXCEPT:

Accepted Answer

Bulb of penis

Answer

External urethral sphincter

Answer

Dorsal nerve of penis

Answer

Bulbourethral glands

Pelvis and Perineum — MCQs

Pelvis and Perineum — MCQs

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