TEST BANK FOR COMPREHENSIVE RADIOGRAPHIC PATHOLOGY
LATEST EDITION BY EXPERTS OF THE SAME(PROFESSORS IN THE
FIELD) ALL CHAPTERS INCLUDED THROUGH USEFUL QUESTIONS
&RATIONALES
1. Which radiographic finding is most characteristic of the late (sclerotic) phase of Paget’s disease
(osteitis deformans) in the skull?
A) Lytic geographic lesions with no marginal sclerosis
B) A "cotton-wool" appearance with mixed lytic and sclerotic patches
C) Expansile lytic lesions with "soap-bubble" trabeculation
D) Diffuse skull thickening with uniform "ivory" sclerosis and loss of vascular markings
Correct Answer: B
Rationale: Paget's disease has three phases: osteolytic, mixed, and osteoblastic (sclerotic). In the skull, the
early osteolytic phase presents as osteoporosis circumscripta. As the disease progresses to the
mixed/sclerotic phase, the disorganized new bone formation creates a characteristic "cotton-wool"
appearance—focal patches of sclerosis mixed with lytic areas. Uniform ivory sclerosis (D) is less typical
of the skull and more typical of the vertebral body ("ivory vertebra"), while "soap-bubble" (C) is typical
of giant cell tumors.
2. A 14-year-old male presents with bone pain. Radiographs demonstrate an aggressive, permeative lytic
lesion in the diaphysis of the femur with a "sunburst" periosteal reaction and a large soft-tissue mass.
What is the most likely diagnosis?
A) Ewing sarcoma
B) Osteosarcoma
C) Chondrosarcoma
D) Multiple myeloma
Correct Answer: B
Rationale: While both Ewing sarcoma and osteosarcoma are aggressive malignancies in younger patients,
their radiographic presentations differ. Osteosarcoma typically arises in the metaphysis and produces
malignant osteoid, leading to a "sunburst" or "hair-on-end" periosteal reaction and cloud-like tumor bone
formation. Ewing sarcoma arises in the diaphysis and is characterized by a permeative ("moth-eaten")
pattern with an "onion-skin" (lamellated) periosteal reaction. Chondrosarcoma shows calcified chondroid
matrix ("rings and arcs").
,3. In rheumatoid arthritis (RA), which radiographic feature distinguishes it from osteoarthritis (OA) in the
hands?
A) Osteophyte formation at the distal interphalangeal (DIP) joints
B) Subchondral sclerosis and cyst formation
C) Marginal erosions and uniform joint space narrowing at the proximal interphalgeal (PIP) and
metacarpophalangeal (MCP) joints
D) Asymmetric joint involvement
Correct Answer:C
Rationale: RA is a synovial inflammatory disease. It causes pannus formation, which erodes bone at the
margins of the joint (where synovium contacts bone unprotected by cartilage) and destroys cartilage
uniformly, leading to uniform joint space narrowing. OA is a degenerative, non-inflammatory process
characterized by non-uniform (asymmetric) joint space narrowing due to mechanical wear, osteophytosis
(bone proliferation), and subchondral sclerosis.
4. Which of the following primary malignancies predominantly produces osteoblastic (sclerotic) bone
metastases?
A) Renal cell carcinoma
B) Thyroid carcinoma
C) Prostate carcinoma
D) Multiple myeloma
Correct Answer: C
Rationale: Bone metastases are classified as lytic, blastic, or mixed. Prostate carcinoma is the classic
cause of osteoblastic metastases, stimulating osteoblasts to form dense, sclerotic bone, often appearing as
diffuse white patches in the pelvis, spine, and ribs. Renal cell and thyroid carcinomas typically produce
purely lytic, expansile metastases. Multiple myeloma is purely lytic and classically does not provoke a
blastic response (hence negative bone scans).
5. A patient with Adult Respiratory Distress Syndrome (ARDS) has a chest radiograph showing diffuse,
bilateral, homogenous alveolar opacities. However, the patient's cardiac silhouette is normal in size. What
pathophysiologic mechanism explains this radiographic appearance?
A) Increased pulmonary capillary hydrostatic pressure
B) Left ventricular failure
C) Increased alveolar-capillary membrane permeability
D) Lymphatic obstruction
Correct Answer: C
,Rationale: ARDS is characterized by non-cardiogenic pulmonary edema. It is caused by an insult (direct
or indirect) that damages the alveolar-capillary membrane, making it highly permeable. This allows
protein-rich fluid to leak into the alveoli, causing diffuse bilateral opacities ("white out"). Because the
edema is not due to heart failure or increased hydrostatic pressure (as in cardiogenic edema), the heart
size remains normal, and there is no cephalization of pulmonary vessels.
6. Which radiographic sign is considered pathognomonic for silicosis and is rarely seen in coal worker's
pneumoconiosis (CWP)?
A) Progressive massive fibrosis (PMF)
B) "Eggshell" calcification of hilar lymph nodes
C) "Snowstorm" appearance of the lung parenchyma
D) Pneumothorax
Correct Answer: B
Rationale: Both silicosis and CWP present with small, upper-lobe predominant nodules and can both
progress to progressive massive fibrosis (PMF). However, "eggshell" calcification (thin, peripheral
calcification of the hilar and mediastinal lymph nodes) is highly characteristic of silicosis (and
sarcoidosis) but is distinctly rare in CWP.
7. A 55-year-old male smoker presents with a right apical lung mass, destruction of the first rib, and ptosis
of the right eyelid. What is the most likely diagnosis, and what is the anatomic basis of the ptosis?
A) Bronchial carcinoid; compression of the superior vena cava
B) Pancoast tumor; invasion of the stellate ganglion
C) Mesothelioma; invasion of the phrenic nerve
D) Superior sulcus tumor; compression of the recurrent laryngeal nerve
Correct Answer: B
Rationale: A Pancoast tumor (superior sulcus tumor) is typically a non-small cell lung cancer located at
the extreme apex of the lung. Because of its location, it can invade local structures, including the ribs and
the sympathetic chain (stellate ganglion). Compression/invasion of the stellate ganglion causes Horner
syndrome, which is characterized by ptosis (drooping eyelid), miosis (constricted pupil), and anhidrosis
(lack of sweating) on the ipsilateral side.
8. On a barium enema, Crohn disease (CD) of the terminal ileum is most likely to demonstrate which of
the following hallmark features?
A) "Lead pipe" appearance with loss of haustral folds
B) Continuous involvement from the rectum proximally
, C) "String sign" with thickened, nodular folds (cobblestoning) and skip lesions
D) Deep collar-button ulcers with mucosal bridging
Correct Answer: D
Rationale: Crohn disease is a transmural inflammatory disease. Its hallmark features include skip lesions
(areas of disease separated by normal bowel), transmural thickening leading to luminal narrowing (the
"string sign"), and deep longitudinal and transverse ulcers creating a "cobblestone" appearance.
Ulcerative colitis (UC), in contrast, is mucosal, begins in the rectum, spreads continuously, and leads to a
"lead pipe" appearance due to loss of haustra (B).
9. What constitutes Rigler's triad on an abdominal radiograph, and what condition does it indicate?
A) Gallstone ileus; pneumobilia, small bowel obstruction, and ectopic gallstone
B) Bowel perforation; free air, football sign, and falciform ligament sign
C) Intussusception; meniscus sign, target sign, and absent bowel gas
D) Mesenteric ischemia; thumbprinting, pneumatosis, and portal venous gas
Correct Answer: A
Rationale: Gallstone ileus is a mechanical bowel obstruction caused by a gallstone that has eroded into the
bowel lumen via a cholecystoenteric fistula. Rigler's triad describes the classic (though not always visible)
radiographic findings: 1) Pneumobilia (air in the biliary tree from the fistula), 2) Small bowel obstruction
(dilated loops and air-fluid levels), and 3) An ectopic gallstone (often seen in the right lower quadrant).
10. On an upright chest radiograph of a patient with a perforated duodenal ulcer, free air is observed.
Under which anatomic structure is this free air most likely to be visualized?
A) Left hemidiaphragm
B) Right hemidiaphragm
C) Hepatic flexure
D) Gastric bubble
Correct Answer: B
Rationale:The duodenum is a retroperitoneal structure, but a perforated anterior duodenal ulcer allows air
to escape into the peritoneal cavity. On an upright CXR, free peritoneal air rises to the highest point under
the diaphragm. Because the left hemidiaphragm is usually obscured by the gastric fundus and splenic
flexure, and the liver provides a solid, homogeneous background, free air is most easily visualized under
the *right* hemidiaphragm as a thin crescent of lucency.
LATEST EDITION BY EXPERTS OF THE SAME(PROFESSORS IN THE
FIELD) ALL CHAPTERS INCLUDED THROUGH USEFUL QUESTIONS
&RATIONALES
1. Which radiographic finding is most characteristic of the late (sclerotic) phase of Paget’s disease
(osteitis deformans) in the skull?
A) Lytic geographic lesions with no marginal sclerosis
B) A "cotton-wool" appearance with mixed lytic and sclerotic patches
C) Expansile lytic lesions with "soap-bubble" trabeculation
D) Diffuse skull thickening with uniform "ivory" sclerosis and loss of vascular markings
Correct Answer: B
Rationale: Paget's disease has three phases: osteolytic, mixed, and osteoblastic (sclerotic). In the skull, the
early osteolytic phase presents as osteoporosis circumscripta. As the disease progresses to the
mixed/sclerotic phase, the disorganized new bone formation creates a characteristic "cotton-wool"
appearance—focal patches of sclerosis mixed with lytic areas. Uniform ivory sclerosis (D) is less typical
of the skull and more typical of the vertebral body ("ivory vertebra"), while "soap-bubble" (C) is typical
of giant cell tumors.
2. A 14-year-old male presents with bone pain. Radiographs demonstrate an aggressive, permeative lytic
lesion in the diaphysis of the femur with a "sunburst" periosteal reaction and a large soft-tissue mass.
What is the most likely diagnosis?
A) Ewing sarcoma
B) Osteosarcoma
C) Chondrosarcoma
D) Multiple myeloma
Correct Answer: B
Rationale: While both Ewing sarcoma and osteosarcoma are aggressive malignancies in younger patients,
their radiographic presentations differ. Osteosarcoma typically arises in the metaphysis and produces
malignant osteoid, leading to a "sunburst" or "hair-on-end" periosteal reaction and cloud-like tumor bone
formation. Ewing sarcoma arises in the diaphysis and is characterized by a permeative ("moth-eaten")
pattern with an "onion-skin" (lamellated) periosteal reaction. Chondrosarcoma shows calcified chondroid
matrix ("rings and arcs").
,3. In rheumatoid arthritis (RA), which radiographic feature distinguishes it from osteoarthritis (OA) in the
hands?
A) Osteophyte formation at the distal interphalangeal (DIP) joints
B) Subchondral sclerosis and cyst formation
C) Marginal erosions and uniform joint space narrowing at the proximal interphalgeal (PIP) and
metacarpophalangeal (MCP) joints
D) Asymmetric joint involvement
Correct Answer:C
Rationale: RA is a synovial inflammatory disease. It causes pannus formation, which erodes bone at the
margins of the joint (where synovium contacts bone unprotected by cartilage) and destroys cartilage
uniformly, leading to uniform joint space narrowing. OA is a degenerative, non-inflammatory process
characterized by non-uniform (asymmetric) joint space narrowing due to mechanical wear, osteophytosis
(bone proliferation), and subchondral sclerosis.
4. Which of the following primary malignancies predominantly produces osteoblastic (sclerotic) bone
metastases?
A) Renal cell carcinoma
B) Thyroid carcinoma
C) Prostate carcinoma
D) Multiple myeloma
Correct Answer: C
Rationale: Bone metastases are classified as lytic, blastic, or mixed. Prostate carcinoma is the classic
cause of osteoblastic metastases, stimulating osteoblasts to form dense, sclerotic bone, often appearing as
diffuse white patches in the pelvis, spine, and ribs. Renal cell and thyroid carcinomas typically produce
purely lytic, expansile metastases. Multiple myeloma is purely lytic and classically does not provoke a
blastic response (hence negative bone scans).
5. A patient with Adult Respiratory Distress Syndrome (ARDS) has a chest radiograph showing diffuse,
bilateral, homogenous alveolar opacities. However, the patient's cardiac silhouette is normal in size. What
pathophysiologic mechanism explains this radiographic appearance?
A) Increased pulmonary capillary hydrostatic pressure
B) Left ventricular failure
C) Increased alveolar-capillary membrane permeability
D) Lymphatic obstruction
Correct Answer: C
,Rationale: ARDS is characterized by non-cardiogenic pulmonary edema. It is caused by an insult (direct
or indirect) that damages the alveolar-capillary membrane, making it highly permeable. This allows
protein-rich fluid to leak into the alveoli, causing diffuse bilateral opacities ("white out"). Because the
edema is not due to heart failure or increased hydrostatic pressure (as in cardiogenic edema), the heart
size remains normal, and there is no cephalization of pulmonary vessels.
6. Which radiographic sign is considered pathognomonic for silicosis and is rarely seen in coal worker's
pneumoconiosis (CWP)?
A) Progressive massive fibrosis (PMF)
B) "Eggshell" calcification of hilar lymph nodes
C) "Snowstorm" appearance of the lung parenchyma
D) Pneumothorax
Correct Answer: B
Rationale: Both silicosis and CWP present with small, upper-lobe predominant nodules and can both
progress to progressive massive fibrosis (PMF). However, "eggshell" calcification (thin, peripheral
calcification of the hilar and mediastinal lymph nodes) is highly characteristic of silicosis (and
sarcoidosis) but is distinctly rare in CWP.
7. A 55-year-old male smoker presents with a right apical lung mass, destruction of the first rib, and ptosis
of the right eyelid. What is the most likely diagnosis, and what is the anatomic basis of the ptosis?
A) Bronchial carcinoid; compression of the superior vena cava
B) Pancoast tumor; invasion of the stellate ganglion
C) Mesothelioma; invasion of the phrenic nerve
D) Superior sulcus tumor; compression of the recurrent laryngeal nerve
Correct Answer: B
Rationale: A Pancoast tumor (superior sulcus tumor) is typically a non-small cell lung cancer located at
the extreme apex of the lung. Because of its location, it can invade local structures, including the ribs and
the sympathetic chain (stellate ganglion). Compression/invasion of the stellate ganglion causes Horner
syndrome, which is characterized by ptosis (drooping eyelid), miosis (constricted pupil), and anhidrosis
(lack of sweating) on the ipsilateral side.
8. On a barium enema, Crohn disease (CD) of the terminal ileum is most likely to demonstrate which of
the following hallmark features?
A) "Lead pipe" appearance with loss of haustral folds
B) Continuous involvement from the rectum proximally
, C) "String sign" with thickened, nodular folds (cobblestoning) and skip lesions
D) Deep collar-button ulcers with mucosal bridging
Correct Answer: D
Rationale: Crohn disease is a transmural inflammatory disease. Its hallmark features include skip lesions
(areas of disease separated by normal bowel), transmural thickening leading to luminal narrowing (the
"string sign"), and deep longitudinal and transverse ulcers creating a "cobblestone" appearance.
Ulcerative colitis (UC), in contrast, is mucosal, begins in the rectum, spreads continuously, and leads to a
"lead pipe" appearance due to loss of haustra (B).
9. What constitutes Rigler's triad on an abdominal radiograph, and what condition does it indicate?
A) Gallstone ileus; pneumobilia, small bowel obstruction, and ectopic gallstone
B) Bowel perforation; free air, football sign, and falciform ligament sign
C) Intussusception; meniscus sign, target sign, and absent bowel gas
D) Mesenteric ischemia; thumbprinting, pneumatosis, and portal venous gas
Correct Answer: A
Rationale: Gallstone ileus is a mechanical bowel obstruction caused by a gallstone that has eroded into the
bowel lumen via a cholecystoenteric fistula. Rigler's triad describes the classic (though not always visible)
radiographic findings: 1) Pneumobilia (air in the biliary tree from the fistula), 2) Small bowel obstruction
(dilated loops and air-fluid levels), and 3) An ectopic gallstone (often seen in the right lower quadrant).
10. On an upright chest radiograph of a patient with a perforated duodenal ulcer, free air is observed.
Under which anatomic structure is this free air most likely to be visualized?
A) Left hemidiaphragm
B) Right hemidiaphragm
C) Hepatic flexure
D) Gastric bubble
Correct Answer: B
Rationale:The duodenum is a retroperitoneal structure, but a perforated anterior duodenal ulcer allows air
to escape into the peritoneal cavity. On an upright CXR, free peritoneal air rises to the highest point under
the diaphragm. Because the left hemidiaphragm is usually obscured by the gastric fundus and splenic
flexure, and the liver provides a solid, homogeneous background, free air is most easily visualized under
the *right* hemidiaphragm as a thin crescent of lucency.
