Radiology

Question 1

when you see…

lytic bone lesions on x-ray films

think of…

Answer 1

• MM
• primary bone tumor
• metastasis (MC: lung, renal, thyroid, breast)

Question 2

when you see…

blastic bone lesions on x-ray films

think of…

Answer 2

• metastasis (MC: breast, prostate, lymphoma)
• Paget’s disease
• medulloblastoma in pediatrics

Question 3

when you see…

large mediastinum

think of…

Answer 3

• aortic aneurysm

- lymphadenopathy

Question 4

when you see…

lung infiltrated w/ an effusion

think of…

Answer 4

• Staphylococcus pneumoniae
• Streptococcus pneumoniae
• lung infarct
• TB

Question 5

when you see…

SBO

think of…

Answer 5

• adhesions
• hernia
• intussusception in pediatrics
• gallstone ileus
• carcinoma

Question 6

when you see…

large bowel obstruction

think of…

Answer 6

• carcinoma
• hernia
• diverticulitis
• intussusception (pediatrics)

Question 7

when you see…

gas in biliary system

think of…

Answer 7

• gallstone ileus
• gas forming infection
• instrumentation

Question 8

when you see…

small kidney(s)

think of…

Answer 8

• RAD
• chronic hydronephrosis
• chronic glomerulonephritis
• chronic pyelonephritis

Question 9

when you see…

large kidney(s)

think of…

Answer 9

• acute pyelonephritis
• acute glomerulonephritis
• renal vein thrombosis
• carcinoma (U/L)
• Wilms’ tumor (pediatrics)

Question 10

when you see…

ring-enhancing lesion in brain

think of…

Answer 10

immunocompetent patients:

• metastatic tumors
• demyelinating disease
• pyogenic abscess

immunocompromised patients:

• toxoplasma encephalitis (T. gondii)
• primary CNS lymphoma (EBV)
• TB (in endemic areas)

Question 11

when you see…

hemorrhage in basal ganglia, cerebellum, or pons

think of…

Answer 11

• hypertensive brain hemorrhage

Question 12

when you see…

hemorrhage into the cerebral hemispheres

think of…

Answer 12

• arteriovenous malformation
• aneurysm
• trauma
• metastatic lesions
• other causes: vasculitis, cocaine, coagulation abnormalities