Abdominal and Pelvic Radiology Practice Questions

Q: Thickened gastric folds are found in which of the following conditions?

All of the above. Thickened gastric folds (hypertrophic gastropathy) are a significant radiological and endoscopic finding characterized by rugae exceeding 5 mm in width. This appearance results from infiltration of the gastric wall by inflammatory cells, malignant cells, or excessive mucosal proliferation. **Explanation of Options:** * **Lymphoma (Option A):** Gastric lymphoma (most commonly MALToma or DLBCL) typically presents with massive, irregular, and "soft" fold thickening. Unlike adenocarcinoma, lymphoma often preserves gastric pliability and distensibility despite extensive infiltration. * **Menetrier’s Disease (Option B):** This is a protein-losing gastropathy characterized by massive hyperplasia of surface mucous cells and atrophy of parietal cells. It classically involves the **fundus and body**, sparing the antrum, and presents with "giant" folds resembling cerebral convolutions. * **Carcinoma (Option C):** Specifically, **Linitis Plastica** (diffuse-type adenocarcinoma) causes significant wall thickening and fold distortion. In these cases, the stomach becomes rigid and non-distensible (the "leather bottle" appearance). **Why "All of the Above" is Correct:** All three conditions involve pathological processes—neoplastic infiltration (Lymphoma/Carcinoma) or mucosal hyperplasia (Menetrier’s)—that increase the volume of the gastric wall layers, leading to the radiological appearance of thickened folds. **NEET-PG High-Yield Pearls:** * **Zollinger-Ellison Syndrome:** Another classic cause of thickened folds due to hypergastrinemia-induced parietal cell hyperplasia. * **Menetrier’s Disease Triad:** Giant gastric folds + Hypoalbuminemia (protein loss) + Achlorhydria. * **Imaging Modality:** While Barium swallow shows "filling defects" or "cobblestone" patterns, **CT scan** is the preferred modality to assess wall thickness and extragastric extension.

Q: A "rat-tail" appearance on barium swallow examination is seen in which of the following conditions?

Carcinoma esophagus. ### Explanation The **"rat-tail" appearance** (also known as the "bird-beak" or "apple-core" appearance in different contexts) on a barium swallow refers to a short, irregular, and eccentric narrowing of the distal esophagus. **1. Why Carcinoma Esophagus is correct:** In esophageal malignancy, the tumor causes asymmetric, transmural infiltration of the esophageal wall. This leads to an **abrupt, irregular narrowing** with "shouldering" of the margins, creating a ragged, tapered look resembling a rat’s tail. This reflects the destructive and stenotic nature of the growth. **2. Analysis of Incorrect Options:** * **Achalasia Cardia:** This condition typically shows a **"bird-beak"** or **"mouse-tail"** appearance. Unlike the rat-tail of cancer, the narrowing in achalasia is **smooth, symmetric, and persistent**, representing a failure of the lower esophageal sphincter (LES) to relax. * **Hiatus Hernia:** This is characterized by the protrusion of the stomach through the diaphragmatic hiatus. On barium swallow, it appears as a bulbous sac above the diaphragm with the presence of gastric folds (Schatzki ring may also be seen). * **Diffuse Esophageal Spasm (DES):** This presents with a **"corkscrew esophagus"** or **"rosary bead"** appearance due to simultaneous, non-peristaltic tertiary contractions. **3. NEET-PG High-Yield Pearls:** * **Bird-beak/Mouse-tail:** Achalasia Cardia (Smooth tapering). * **Rat-tail/Apple-core:** Carcinoma Esophagus (Irregular tapering). * **Corkscrew/Rosary bead:** Diffuse Esophageal Spasm. * **Shaggy/Moth-eaten:** Candida Esophagitis. * **Multiple small ulcers (Halo sign):** Herpes Esophagitis. * **Stepladder appearance:** Corrosive injury (strictures).

Q: The "collar button" sign is associated with which condition?

Ulcerative colitis. The **"collar button" sign** is a classic radiological finding in **Ulcerative Colitis (UC)**, typically seen on a double-contrast barium enema. ### 1. Why Ulcerative Colitis is Correct In the acute phase of UC, inflammation leads to the formation of deep, penetrating ulcers. These ulcers extend through the mucosa and undermine the submucosa. On a barium study, the contrast fills these ulcers, appearing as a narrow neck (at the mucosal level) that expands into a wider base (in the submucosa). This shape resembles a traditional shirt collar button or a "T-shaped" projection. ### 2. Why Other Options are Incorrect * **Hirschsprung disease:** Characterized by a "transition zone" on barium enema, where a narrow aganglionic distal segment leads to a dilated proximal colon (megacolon). * **Plummer-Vinson syndrome:** Associated with esophageal webs, iron deficiency anemia, and dysphagia. On imaging, it shows a thin, horizontal shelf-like projection in the upper esophagus. * **Chilaiditi syndrome:** A radiological curiosity where a loop of colon (usually the hepatic flexure) is interposed between the liver and the diaphragm, mimicking pneumoperitoneum. ### 3. NEET-PG High-Yield Pearls * **Lead Pipe Colon:** Seen in chronic UC due to loss of haustrations and bowel shortening. * **Pseudopolyps:** Islands of regenerating mucosa surrounded by areas of ulceration. * **Thumbprinting:** Seen in ischemic colitis (due to submucosal edema/hemorrhage). * **String Sign of Kantor:** Associated with Crohn’s disease (terminal ileum narrowing). * **Cobblestone Appearance:** Classic for Crohn’s disease due to longitudinal and transverse ulcers.

Q: Which of the following conditions is characterized by a trifoliate appearance?

Peptic ulcer. The **trifoliate appearance** (also known as the **cloverleaf deformity**) is a classic radiological sign seen on a Barium meal study in patients with a chronic **duodenal ulcer** (a type of peptic ulcer). ### Why Peptic Ulcer is Correct: When a chronic ulcer occurs in the duodenal bulb, it undergoes repeated cycles of healing and scarring. This leads to: 1. **Central Crater:** The active ulcer niche. 2. **Pseudodiverticula:** The surrounding duodenal wall puckers and outpouches due to cicatricial (scar) contraction. The combination of the central ulcer niche and the symmetrical outpouchings of the bulb creates a shape resembling a three-leaf clover or a "trifoliate" pattern. ### Why Other Options are Incorrect: * **Pyloric Stenosis:** Typically presents with the **"String sign"** (narrowed pyloric canal), **"Beak sign,"** or **"Mushroom sign"** on Barium studies. It does not produce a cloverleaf shape. * **Carcinoma Head of Pancreas:** Classically associated with the **"Frostberg’s inverted 3 sign"** on Barium swallow/meal, caused by the tumor indenting the medial wall of the duodenum. ### High-Yield Clinical Pearls for NEET-PG: * **Cloverleaf Deformity:** Chronic Duodenal Ulcer (specifically the bulb). * **Frostberg’s Sign:** Carcinoma Head of Pancreas. * **Double Bubble Sign:** Duodenal Atresia (X-ray). * **Single Bubble Sign:** Pyloric Stenosis (X-ray). * **Coffee Bean Sign:** Sigmoid Volvulus. * **Bird’s Beak Appearance:** Achalasia Cardia (Barium Swallow).

Q: A 56-year-old male presents with burning micturition, increasing frequency, and hesitancy. An intravenous pyelogram was performed, and the radiograph is shown. What is the most likely diagnosis?

Pelvic lipomatosis. ***Pelvic lipomatosis*** - Presents with **pear-shaped bladder** and **radiolucent halo** around the bladder on IVP, caused by excess **fatty tissue** in the pelvis compressing the bladder - Commonly affects **middle-aged males** causing **lower urinary tract symptoms** (LUTS) including burning micturition, frequency, and hesitancy due to bladder compression *Multicystic dysplastic kidney disease* - A **congenital condition** typically diagnosed in **infancy or childhood**, not in a 56-year-old male - Shows **multiple non-communicating cysts** replacing normal renal parenchyma on imaging, not the pear-shaped bladder deformity seen here *Aortic aneurysm* - Would present with **pulsatile abdominal mass** and potential **back pain**, not primarily urinary symptoms - IVP would show **lateral displacement** of ureters or kidneys, not the characteristic bladder changes described *Renal cell carcinoma* - Typically presents with **hematuria**, **flank pain**, and **palpable mass** (classic triad), not lower urinary tract symptoms - IVP would show **renal mass effect** or **calyceal distortion**, not the pear-shaped bladder configuration

Q: Functional analysis of the kidney is best evaluated by which imaging modality?

Radionuclide scanning. **Explanation:** The gold standard for the functional evaluation of the kidneys is **Radionuclide scanning (Nuclear Medicine)**. Unlike anatomical imaging, nuclear scans utilize radiopharmaceuticals (like DTPA, MAG3, or DMSA) that are handled by the kidneys through specific physiological processes—glomerular filtration or tubular secretion. By measuring the rate of uptake and excretion of these tracers over time, clinicians can calculate the **Split Renal Function (SRF)** and the **Glomerular Filtration Rate (GFR)** with high precision. **Analysis of Options:** * **Intravenous Pyelography (IVP):** While IVP provides a "rough" estimate of function (visualizing contrast excretion), it is primarily used for anatomical assessment of the collecting system. It is qualitative rather than quantitative and is largely replaced by CT Urography. * **Ultrasound:** This is the initial screening modality for renal size, cortical thickness, and hydronephrosis. It provides excellent **anatomical** detail but offers no direct information regarding renal function or GFR. * **MRI:** MR Urography can assess function (Dynamic Contrast-Enhanced MRI), but it is expensive, not widely available for routine functional assessment, and carries the risk of Nephrogenic Systemic Fibrosis (NSF) in patients with pre-existing renal failure. **High-Yield Clinical Pearls for NEET-PG:** * **99mTc-DTPA:** Best for evaluating **GFR** (filtered by the glomerulus). * **99mTc-MAG3:** Best for evaluating renal function in patients with **renal failure** (secreted by tubules). * **99mTc-DMSA:** The gold standard for detecting **renal scarring** and cortical morphology (it binds to the proximal tubules and stays in the cortex). * **Diuretic Renogram (Lasix Scan):** Used to differentiate between obstructive and non-obstructive hydronephrosis.

Q: Which of the following is NOT a typical ultrasound finding of Autosomal Recessive Polycystic Kidney Disease (ARPKD)?

Cysts greater than 3 cm in diameter. **Explanation:** **Autosomal Recessive Polycystic Kidney Disease (ARPKD)** is a genetic disorder characterized by the non-obstructive ectasia (dilation) of the renal collecting ducts. **Why Option D is the Correct Answer:** In ARPKD, the cysts are microscopic (usually 3 cm) are characteristic of **Autosomal Dominant Polycystic Kidney Disease (ADPKD)** or simple renal cysts, but are not a feature of the infantile/neonatal presentation of ARPKD. **Analysis of Incorrect Options:** * **Option A:** Despite massive enlargement, the kidneys typically **retain their reniform (kidney-like) shape** because the dilation is uniform across the collecting system. * **Option B:** Since the kidneys are dysfunctional in utero, there is decreased fetal urine production, leading to **oligohydramnios**, which can result in Potter sequence (pulmonary hypoplasia, clubbed feet, and flattened facies). * **Option C:** The diffuse involvement of the collecting ducts throughout the parenchyma leads to a **loss of corticomedullary differentiation**, as the entire kidney becomes uniformly hyperechoic. **High-Yield Clinical Pearls for NEET-PG:** * **Genetics:** Mutation in the **PKHD1 gene** on chromosome 6, encoding the protein **fibrocystin**. * **Liver Involvement:** ARPKD is invariably associated with **Congenital Hepatic Fibrosis**. On imaging, look for biliary hamartomas or Caroli disease. * **Classic USG Sign:** "Large echogenic kidneys" in a neonate. * **Contrast Imaging:** On IVP, it may show a "sunburst" or "radial streaking" appearance due to contrast filling the dilated tubules.

Q: The "Bouquet of Flowers" appearance is classically seen in which of the following conditions?

Medullary Sponge Kidney. ### Explanation **Correct Answer: D. Medullary Sponge Kidney (MSK)** **The Medical Concept:** Medullary Sponge Kidney is a congenital condition characterized by ectasia (dilatation) of the **pre-calyceal collecting ducts** in the renal pyramids. On an **Intravenous Urogram (IVU)**, the contrast medium fills these dilated tubules. This creates a characteristic streaky or brush-like appearance. When these dilated tubules are filled with contrast and surround the minor calyces, it resembles a **"Bouquet of Flowers"** or a **"Paintbrush"** appearance. **Why the other options are incorrect:** * **ADPKD:** Characterized by large, distorted kidneys with multiple cysts of varying sizes throughout the cortex and medulla. On imaging, it shows a "Swiss Cheese" appearance or "Spider Leg" deformity of the calyces due to stretching. * **ARPKD:** Typically presents in infancy with bilaterally enlarged, echogenic kidneys. On IVU, it shows a "Sunburst" or "Radial Spoke" pattern due to contrast filling elongated, radially oriented cysts. * **Horseshoe Kidney:** This is a fusion anomaly (usually at the lower poles). The classic radiological sign is the "Handshaking" appearance or abnormal axis of the kidneys (lower poles pointing medially). **High-Yield Clinical Pearls for NEET-PG:** * **MSK Associations:** Often associated with **Nephrocalcinosis** (calcium phosphate/oxalate stones) and recurrent UTIs. * **Hypercalciuria:** MSK is a common cause of idiopathic hypercalciuria and stone formation in young adults. * **Imaging Gold Standard:** While CT Urography is now common, the "Bouquet of Flowers" is a classic **IVU** description. * **Key Differential:** Do not confuse the "Paintbrush" of MSK with the "Papillary Necrosis" (Ring sign/Lobster claw sign).

Q: An X-ray of the abdomen shows multiple fluid levels. What is the most likely diagnosis?

Intestinal obstruction. **Explanation:** **1. Why Intestinal Obstruction is Correct:** The presence of **multiple air-fluid levels** on an erect abdominal X-ray is a classic radiological hallmark of **mechanical intestinal obstruction**. When the normal forward flow of contents is blocked, gas and liquid accumulate in the dilated loops of the bowel. Gravity causes the fluid to settle at the bottom while gas rises to the top, creating a distinct horizontal interface (the fluid level). * **Small Bowel Obstruction (SBO):** Typically shows multiple central loops with a "step-ladder" appearance. More than 2–3 fluid levels are considered pathological. * **Large Bowel Obstruction:** Shows peripheral loops with haustral markings. **2. Why Other Options are Incorrect:** * **B. Hollow Viscus Perforation:** The characteristic radiological finding here is **pneumoperitoneum** (free air under the diaphragm on an erect chest/abdominal X-ray), not multiple fluid levels within the bowel. * **C. Pyoperitoneum:** This refers to pus in the peritoneal cavity. While it may cause a generalized "ground-glass" haziness (ascites appearance) or an adynamic ileus, it does not typically present with the classic multiple fluid levels seen in mechanical obstruction. **3. NEET-PG High-Yield Pearls:** * **Step-ladder pattern:** Classic sign of SBO on an erect film. * **String of beads/pearls sign:** Small bubbles of gas trapped between valvulae conniventes in a fluid-filled small bowel; highly suggestive of SBO. * **Coffee bean sign:** Pathognomonic for Sigmoid Volvulus. * **Coiled spring appearance:** Seen on contrast studies/ultrasound in Intussusception. * **Rule of 3-6-9:** Normal bowel diameter is <3cm (Small bowel), <6cm (Large bowel), and <9cm (Cecum). Anything above this suggests dilatation/obstruction.

Question 1

Which of the following represents the best method in diagnosing medullary cystic disease of the kidney?

Accepted Answer

Biopsy

Answer

Ultrasound

Answer

Nuclear scan

Answer

Urography

Question 2

Thickened gastric folds are found in which of the following conditions?

Accepted Answer

All of the above

Answer

Lymphoma

Answer

Menetrier's disease

Answer

Carcinoma

Question 3

A "rat-tail" appearance on barium swallow examination is seen in which of the following conditions?

Accepted Answer

Carcinoma esophagus

Answer

Achalasia cardia

Answer

Hiatus hernia

Answer

Diffuse esophageal spasm

Question 4

The "collar button" sign is associated with which condition?

Accepted Answer

Ulcerative colitis

Answer

Hirschsprung disease

Answer

Plummer-Vinson syndrome

Answer

Chilaiditi syndrome

Question 5

Which of the following conditions is characterized by a trifoliate appearance?

Accepted Answer

Peptic ulcer

Answer

Pyloric stenosis

Answer

Carcinoma head of pancreas

Answer

None of the above

Question 6

A 56-year-old male presents with burning micturition, increasing frequency, and hesitancy. An intravenous pyelogram was performed, and the radiograph is shown. What is the most likely diagnosis?

Accepted Answer

Pelvic lipomatosis

Answer

Multicystic dysplastic kidney disease

Answer

Aortic aneurysm

Answer

Renal cell carcinoma

Question 7

Functional analysis of the kidney is best evaluated by which imaging modality?

Accepted Answer

Radionuclide scanning

Answer

Intravenous pyelography (IVP)

Answer

Ultrasound

Answer

Magnetic Resonance Imaging (MRI)

Question 8

Which of the following is NOT a typical ultrasound finding of Autosomal Recessive Polycystic Kidney Disease (ARPKD)?

Accepted Answer

Cysts greater than 3 cm in diameter

Answer

Retention of reniform shape of kidneys

Answer

Oligohydramnios

Answer

Loss of corticomedullary differentiation

Question 9

The "Bouquet of Flowers" appearance is classically seen in which of the following conditions?

Accepted Answer

Medullary Sponge Kidney

Answer

Autosomal Dominant Polycystic Kidney Disease (ADPKD)

Answer

Autosomal Recessive Polycystic Kidney Disease (ARPKD)

Answer

Horseshoe Kidney

Question 10

An X-ray of the abdomen shows multiple fluid levels. What is the most likely diagnosis?

Accepted Answer

Intestinal obstruction

Answer

Hollow viscus perforation

Answer

Pyoperitoneum

Answer

None of the above

Abdominal and Pelvic Radiology — MCQs

Abdominal and Pelvic Radiology — MCQs

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