Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Imaging of Peritoneal Cavity and Retroperitoneum. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Question 1: Most sensitive investigation for abdominal trauma in a hemodynamically stable patient is-
- A. Ultrasonography (FAST)
- B. Diagnostic peritoneal lavage (DPL)
- C. MRI (Magnetic Resonance Imaging)
- D. CT Scan (Computed Tomography) (Correct Answer)
Imaging of Peritoneal Cavity and Retroperitoneum Explanation: ***CT Scan (Computed Tomography)***
- **CT scans** offer superior anatomical detail and can accurately detect organ damage, hemorrhage, and other injuries in **hemodynamically stable** patients with abdominal trauma.
- It is considered the **most sensitive** and specific imaging modality for evaluating blunt and penetrating abdominal trauma when the patient can tolerate the study.
*Ultrasonography (FAST)*
- While effective for detecting **free fluid** (blood) in specific abdominal areas, **Focused Assessment with Sonography for Trauma (FAST)** has lower sensitivity for solid organ injuries or bowel perforations.
- Its primary role is rapid assessment for **hemoperitoneum** to guide immediate management in unstable patients, not detailed injury characterization.
*Diagnostic peritoneal lavage (DPL)*
- **DPL** is an invasive procedure with high sensitivity for detecting **intraperitoneal bleeding**, but it does not identify specific organ injuries or retroperitoneal hemorrhage.
- It is rarely used in hemodynamically stable patients due to its invasiveness and the availability of more detailed imaging techniques.
*MRI (Magnetic Resonance Imaging)*
- **MRI** provides excellent soft tissue contrast but is typically too **time-consuming** and less accessible in urgent trauma settings compared to CT.
- It's generally not the first-line investigation for acute abdominal trauma due to motion artifacts and limited utility in detecting air or bone injuries.
Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Question 2: Clinical examination of a symptomatic patient shows a Sister Mary Joseph nodule. It is most commonly associated with which of the following?
- A. Ovarian cancer
- B. Stomach cancer (Correct Answer)
- C. Colon cancer
- D. Pancreatic cancer
Imaging of Peritoneal Cavity and Retroperitoneum Explanation: ***Stomach cancer***
- A **Sister Mary Joseph nodule** is a **periumbilical metastatic nodule**, most commonly associated with **gastric adenocarcinoma** due to its propensity for peritoneal spread.
- While it can originate from other abdominal malignancies, stomach cancer is statistically the most frequent primary source of this metastatic sign.
*Ovarian cancer*
- Ovarian cancer can metasatasize to the peritoneum and sometimes cause Sister Mary Joseph nodules, but it is not the most common primary source [1].
- Instead, ovarian cancer more frequently presents with symptoms like **abdominal distension**, **pelvic pain**, or **ascites** [1].
*Colon cancer*
- **Colorectal cancer** can also metastasize to the peritoneum, potentially leading to a Sister Mary Joseph nodule, though less commonly than gastric cancer [2].
- It often manifests with changes in **bowel habits**, **rectal bleeding**, or **unexplained weight loss** [2].
*Pancreatic cancer*
- Pancreatic cancer can produce a Sister Mary Joseph nodule, particularly in advanced stages with **peritoneal dissemination**.
- However, it is primarily known for other metastatic patterns and often presents with **jaundice** (if the head of the pancreas is affected) or **epigastric pain**.
Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Question 3: A child is being assessed for possible intussusception; which of the following would be LEAST likely to provide valuable information?
- A. Pain pattern
- B. Family history (Correct Answer)
- C. Abdominal palpation
- D. Stool inspection
Imaging of Peritoneal Cavity and Retroperitoneum Explanation: ***Family history***
- Intussusception is typically an **acute pediatric condition** with no strong genetic predisposition.
- While certain genetic syndromes can increase risk, general family history of other conditions is **not directly relevant** to confirming or ruling out intussusception.
*Pain pattern*
- The classic **intermittent, colicky abdominal pain** that recurs every 15-20 minutes is a hallmark symptom of intussusception.
- This pattern provides crucial diagnostic information about the **bowel telescoping and transient obstruction**.
*Abdominal palpation*
- Palpation can reveal a **sausage-shaped abdominal mass**, especially in the right upper quadrant, which is a classic physical finding.
- Tenderness, distension, and signs of peritonitis can also be detected, indicating **bowel obstruction or perforation**.
*Stool inspection*
- The presence of "**currant jelly stool**" (blood and mucus) is a highly characteristic sign of intussusception, resulting from venous congestion and sloughing of the intestinal mucosa.
- This finding provides clear evidence of **intestinal ischemia and bleeding**.
Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Question 4: What are the potential symptoms of malignant transformation in a retroperitoneal lipoma?
- A. All of the options (Correct Answer)
- B. Abdominal pain
- C. Weight loss
- D. Renal failure due to compression
Imaging of Peritoneal Cavity and Retroperitoneum Explanation: ***All of the options***
- Malignant transformation of a lipoma, particularly into a **liposarcoma**, can cause a variety of symptoms due to its growth and potential invasion of surrounding structures.
- This includes generalized symptoms like **weight loss**, and localized effects such as **abdominal pain** and **organ compression** (e.g., renal failure).
*Abdominal pain*
- As a retroperitoneal tumor grows, it can cause **mass effect** and pressure on nearby organs and nerves, leading to abdominal pain.
- Pain relief is often sought by patients presenting with these growths, highlighting their clinical significance.
*Weight loss*
- **Unexplained weight loss** is a common constitutional symptom associated with malignancy, including liposarcoma.
- This systemic symptom can indicate a more advanced or aggressive tumor.
*Renal failure due to compression*
- A growing liposarcoma in the retroperitoneum can **compress structures** such as the ureters, leading to hydronephrosis and ultimately **renal failure**.
- Direct invasion or extrinsic compression of the kidney itself can also impair renal function.
Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Question 5: Organ which is commonly involved in retroperitoneal fibrosis is
- A. Ureter (Correct Answer)
- B. Kidneys
- C. Colon
- D. Duodenum
Imaging of Peritoneal Cavity and Retroperitoneum Explanation: ***Ureter***
- Retroperitoneal fibrosis is characterized by the proliferation of **fibrous tissue in the retroperitoneum**, which commonly encases the ureters.
- This encasement can lead to **ureteral obstruction**, causing hydronephrosis and potential renal impairment.
*Colon*
- While the colon is located in the retroperitoneum for some segments (ascending, descending), it is **less commonly entrapped** and obstructed by retroperitoneal fibrosis compared to the ureters.
- **Bowel obstruction** is not a primary or common clinical manifestation of retroperitoneal fibrosis.
*Duodenum*
- The duodenum is primarily located in the **upper retroperitoneum** but is generally less affected by the fibrotic process characteristic of retroperitoneal fibrosis.
- **Obstructive symptoms related to the duodenum** are rare in this condition.
*Kidneys*
- The kidneys are retroperitoneal organs, but the fibrosis typically involves the **perirenal fat and surrounding structures**, not the kidney parenchyma itself.
- Renal dysfunction in retroperitoneal fibrosis is usually a **secondary complication of ureteral obstruction**, not direct renal involvement.
Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Question 6: Gas absent from intestine (gasless abdomen) on x-ray is seen in which condition?
- A. Ulcerative colitis
- B. Intussusception
- C. Acute pancreatitis (Correct Answer)
- D. Necrotizing enterocolitis
Imaging of Peritoneal Cavity and Retroperitoneum Explanation: ***Acute pancreatitis***
- In **severe acute pancreatitis**, a **gasless or relatively gasless abdomen** may be seen due to profound **ileus** with fluid accumulation displacing intestinal gas.
- The marked inflammatory process can lead to complete loss of intestinal motility and fluid sequestration (third-spacing), resulting in minimal visible bowel gas on X-ray.
- **Note**: Classic signs include **sentinel loop sign** (dilated jejunal loop) or **colon cut-off sign**, but in severe cases with massive ascites or fluid collections, a gasless pattern may occur.
*Ulcerative colitis*
- Typically presents with **dilated loops of large bowel** with visible gas and **toxic megacolon** in severe cases.
- Inflammatory changes cause bowel wall thickening, but gas is usually **present and often increased**.
*Intussusception*
- May show a **target sign** or **meniscus sign** on imaging, with bowel loops dilated proximal to the obstruction.
- Gas is typically **present** within the bowel or proximal to the invagination, not absent from the entire abdomen.
*Necrotizing enterocolitis*
- Characterized by **pneumatosis intestinalis** (gas in the bowel wall) and **portal venous gas**, features directly contradicting a gasless abdomen.
- Shows dilated loops with gas and evidence of bowel wall necrosis - **gas is prominently present**.
Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Question 7: What type of uterine anomaly is shown in this X-ray HSG image?
- A. Septate uterus
- B. Uterus didelphys
- C. Unicornuate uterus (Correct Answer)
- D. Bicornuate uterus
Imaging of Peritoneal Cavity and Retroperitoneum Explanation: ***Unicornuate uterus***
- The image shows a single, elongated uterine horn with a single fallopian tube arising from it, consistent with a **unicornuate uterus**.
- This congenital anomaly results from the **failure of one Müllerian duct to develop**, leading to an abnormally shaped uterus.
*Septate uterus*
- A **septate uterus** would show a normal uterine fundus with an internal septum dividing the uterine cavity.
- This image clearly depicts only **one rudimentary horn** and no visible septum.
*Uterus didelphys*
- **Uterus didelphys** involves two completely separate uteri, each with its own cervix and vagina.
- The image does not show evidence of a **second, separate uterine structure**.
*Bicornuate uterus*
- A **bicornuate uterus** is characterized by two distinct uterine horns, which fuse at the cervix or lower uterine segment, creating a heart-shaped appearance of the fundus.
- The image shows a **single, long horn** rather than two distinct horns.
Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Question 8: In a patient with a tender and rigid abdomen, what is the expected finding on X-ray?
- A. Blood under the diaphragm
- B. Air under the diaphragm (Correct Answer)
- C. Hazy lung fields
- D. Prominent vascular markings
Imaging of Peritoneal Cavity and Retroperitoneum Explanation: ***Air under the diaphragm***
- The presence of **free air** (pneumoperitoneum) beneath the diaphragm on an upright abdominal X-ray is a classic sign of **visceral perforation**.
- A **tender and rigid abdomen** (peritoneal signs) indicates irritation of the peritoneum, most commonly due to a ruptured hollow viscus.
*Blood under the diaphragm*
- While blood can accumulate under the diaphragm (e.g., from **trauma** or a ruptured ectopic pregnancy), it typically manifests as a **hemoperitoneum** on imaging.
- Blood is **fluid** and would appear as a fluid collection, not free air, on X-ray.
*Hazy lung fields*
- **Hazy lung fields** suggest conditions like **pulmonary edema**, pneumonia, or acute respiratory distress syndrome (ARDS).
- These findings are primarily associated with pulmonary pathology and are not directly indicative of an acute abdominal emergency like perforation.
*Prominent vascular markings*
- **Prominent vascular markings** often indicate increased blood flow to the lungs or **pulmonary hypertension**.
- This finding is unrelated to acute abdominal pain or peritoneal irritation.
Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Question 9: Blumberg's sign is
- A. Rebound tenderness during abdominal palpation (Correct Answer)
- B. Board-like rigidity of abdomen
- C. Pressure over left iliac fossa causing pain in right iliac fossa
- D. Pressure over right iliac fossa causing pain in left iliac fossa
Imaging of Peritoneal Cavity and Retroperitoneum Explanation: ***Rebound tenderness during abdominal palpation***
- Blumberg's sign refers specifically to **rebound tenderness**, which is pain experienced upon the rapid release of pressure applied to the abdomen.
- It is a classic sign indicating **peritoneal irritation** or inflammation, often seen in conditions like appendicitis.
*Board-like rigidity of abdomen*
- **Board-like rigidity** describes a state of involuntary abdominal muscle contraction, making the abdomen feel hard and inflexible.
- This is a sign of **generalized peritonitis**, a more severe and widespread inflammation of the peritoneum than what typically elicits Blumberg's sign alone.
*Pressure over left iliac fossa causing pain in right iliac fossa*
- This describes **Rovsing's sign**, where palpation of the left lower quadrant causes pain in the right lower quadrant.
- Rovsing's sign is another indicator of **peritoneal irritation** in the right lower quadrant and is commonly associated with appendicitis.
*Pressure over right iliac fossa causing pain in left iliac fossa*
- Applying pressure to the right iliac fossa usually causes pain in that same area if **appendicitis** is present (e.g., McBurney's point tenderness).
- This specific pain pattern (pain in the left iliac fossa from right iliac fossa pressure) is not a recognized named sign for **abdominal pathology**.
Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG Question 10: A patient presents with abdominal pain. On physical examination there was abdominal guarding and tenderness. A plain erect chest X-ray reveals air under diaphragm. Probable diagnosis is
- A. Perforated abdominal viscus (Correct Answer)
- B. Acute myocardial infarction
- C. Aortic dissection
- D. None of the options
Imaging of Peritoneal Cavity and Retroperitoneum Explanation: ***Perforated abdominal viscus***
- The presence of **abdominal guarding** and **tenderness** indicates peritoneal irritation, while **air under the diaphragm** on an erect chest X-ray (**pneumoperitoneum**) is a classic sign of a perforated hollow abdominal organ.
- This combination strongly suggests a **perforated abdominal viscus**, such as a **perforated peptic ulcer** or perforated diverticulitis, leading to the leakage of air and intestinal contents into the peritoneal cavity.
*Acute myocardial infarction*
- Acute myocardial infarction primarily presents with **chest pain**, radiation to the arm/jaw, and shortness of breath, not typically severe abdominal pain with guarding.
- While it can cause some epigastric discomfort, it would not explain the **pneumoperitoneum** seen on the chest X-ray.
*Aortic dissection*
- Aortic dissection typically causes **sudden, severe tearing chest or back pain**, often radiating to the back.
- There is no direct link between aortic dissection and **air under the diaphragm** unless there's a co-existing, unrelated issue, which is not suggested by the primary symptoms.
*None of the options*
- Given the clear clinical and radiological findings of **pneumoperitoneum** and **peritoneal signs**, a perforated abdominal viscus is the most fitting diagnosis among the choices provided.
- This option is incorrect as there is a highly probable diagnosis among the given choices.
More Imaging of Peritoneal Cavity and Retroperitoneum Indian Medical PG questions available in the OnCourse app. Practice MCQs, flashcards, and get detailed explanations.
