DXI EXAM III 2025/2026 QUESTIONS
AND ANSWERS 100% PASS
A heel pad greater than ___ mm is suggestive of acromegaly - ANS 20 mm
"Spade-like" distal tufts of the distal phalanges are associated with what condition? -
ANS Acromegaly
What is platysponydyly? - ANS Elongation of the vertebra. Seen in acromegaly. Visualized on
AP films best
An ADI of up to ___ mm can be considered normal in a patient with acromegaly - ANS 6 mm
In which age group does scurvy normally occur? - ANS 8-14 months; Eldery with dietary
compromise
Usually ___ months duration of avitaminosis before symptoms and skeletal changes of scurvy
become apparent - ANS 4 months
What is thought to cause avascular necrosis in Cushing's Disease and Steroid-Induced
Osteonecrosis? - ANS Fat emboli derived from fatty liver
In which part of bone does Cushing's Disease and Steroid-Induced Osteonecrosis commonly
cause necrosis? - ANS Epiphysis
pg. 1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, What is an intravertebral vacuum cleft sign? - ANS Collapse of vertebral body due to
avascular necrosis collects nitrogen gas within the body
How does the intravertebral vacuum cleft sign appear on MRI over time? - ANS Initially -
black signal void because of gas
Later - High signal on T2 because of fluid infiltration
What are the radiological signs of Osteomalacia? - ANS 1. Decreased bone density
2. Coarsened Trabecular Pattern
3. Loss of cortical definition
4. Pseudo-fractures
5. Deformities
A child presents to your office complaining of muscle spasm, irritability, and weakness. He lives
in a pirating village in a third world country, as evidenced by the bandolier around his torso and
the cigar in his mouth. The kid orders you to take an x-ray and licks the knife in his hand as a
power move. Unequipped to fight the threat of child pirates, you take an x-ray and notice large
uncalcified cartilage masses in his growth plates. What is the most likely cause? - ANS Rickets
Name the radiologic sign:
Widened growth plate with irregular, frayed, and cupped metaphyseal margins. Seen in rickets.
- ANS Paintbrush sign
Fig 14-25 Pg. 1515
What are the radiologic features of hemophilia? - ANS 1. Soft tissue swelling
2. Osteoporosis
3. Subchondral cysts
4. Expansile Bone Lesions (Pseudo-Tumors)
pg. 2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
AND ANSWERS 100% PASS
A heel pad greater than ___ mm is suggestive of acromegaly - ANS 20 mm
"Spade-like" distal tufts of the distal phalanges are associated with what condition? -
ANS Acromegaly
What is platysponydyly? - ANS Elongation of the vertebra. Seen in acromegaly. Visualized on
AP films best
An ADI of up to ___ mm can be considered normal in a patient with acromegaly - ANS 6 mm
In which age group does scurvy normally occur? - ANS 8-14 months; Eldery with dietary
compromise
Usually ___ months duration of avitaminosis before symptoms and skeletal changes of scurvy
become apparent - ANS 4 months
What is thought to cause avascular necrosis in Cushing's Disease and Steroid-Induced
Osteonecrosis? - ANS Fat emboli derived from fatty liver
In which part of bone does Cushing's Disease and Steroid-Induced Osteonecrosis commonly
cause necrosis? - ANS Epiphysis
pg. 1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, What is an intravertebral vacuum cleft sign? - ANS Collapse of vertebral body due to
avascular necrosis collects nitrogen gas within the body
How does the intravertebral vacuum cleft sign appear on MRI over time? - ANS Initially -
black signal void because of gas
Later - High signal on T2 because of fluid infiltration
What are the radiological signs of Osteomalacia? - ANS 1. Decreased bone density
2. Coarsened Trabecular Pattern
3. Loss of cortical definition
4. Pseudo-fractures
5. Deformities
A child presents to your office complaining of muscle spasm, irritability, and weakness. He lives
in a pirating village in a third world country, as evidenced by the bandolier around his torso and
the cigar in his mouth. The kid orders you to take an x-ray and licks the knife in his hand as a
power move. Unequipped to fight the threat of child pirates, you take an x-ray and notice large
uncalcified cartilage masses in his growth plates. What is the most likely cause? - ANS Rickets
Name the radiologic sign:
Widened growth plate with irregular, frayed, and cupped metaphyseal margins. Seen in rickets.
- ANS Paintbrush sign
Fig 14-25 Pg. 1515
What are the radiologic features of hemophilia? - ANS 1. Soft tissue swelling
2. Osteoporosis
3. Subchondral cysts
4. Expansile Bone Lesions (Pseudo-Tumors)
pg. 2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
