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Master the board step 3

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<strong>Master</strong> <strong>the</strong> Boards: USMLE Step 3<br />

When you see…<br />

Abdomen/Pelvis<br />

Small bowel obstruction<br />

Large bowel obstruction<br />

Gas in biliary system<br />

Small kidney(s)<br />

Large kidney(s)<br />

Brain/Neurology<br />

Ring-enhancing lesion in brain<br />

Hemorrhage into basal ganglia,<br />

cerebellum, or pons<br />

Hemorrhage into <strong>the</strong> cerebral<br />

hemispheres<br />

Think of…<br />

Adhesions<br />

Hernia<br />

Intussusception (pediatrics)<br />

Gallstone ileus<br />

Carcinoma<br />

Carcinoma<br />

Hernia<br />

Diverticulitis<br />

Intussusceptions (pediatrics)<br />

Gallstone ileus<br />

Gas forming infection<br />

Instrumentation<br />

Renal artery disease<br />

Chronic hydronephrosis<br />

Chronic glomerulonephritis<br />

Chronic pyelonephritis<br />

Acute pyelonephritis<br />

Acute glomerulonephritis<br />

Renal vein thrombosis<br />

Carcinoma (unilateral)<br />

Wilms’ tumor (pediatrics)<br />

Immunocompetent patients:<br />

• Metastatic tumors<br />

• Demyelinating disease<br />

• Pyogenic abscess<br />

Immunocompromised patients:<br />

• Toxoplasma encephalitis (T. gondii)<br />

• Primary CNS lymphoma (Epstein-Barr virus)<br />

• Tuberculosis (in endemic areas)<br />

Hypertensive brain hemorrhage<br />

Arteriovenous malformation<br />

Aneurysm<br />

Trauma<br />

Metastatic lesions<br />

O<strong>the</strong>r causes: vasculitis, cocaine, coagulation abnormalities<br />

494

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