USMLE Step 3 Diagnostic Tests Latest Update
2024-2025 200 Questions and 100% Verified
Correct Answers Actual Exam Guaranteed A+
24 Hour Urine Protein Collection - CORRECT ANSWER: Gold standard test to diagnose
nephrotic syndrome and preeclampsia
24-Hour pH Monitoring - CORRECT ANSWER: Performed on patients w/resistant
GERD after 4 weeks of PPI therapy or w/inconclusive endoscopic findings
Abdominal Exam Indications - CORRECT ANSWER: Abdominal or pelvic pain, chronic
cough, chills, distension, fever, hypotension, n/v, urinary, bowel, appetite or weight
changes.
Acetylcholine - CORRECT ANSWER: Neurotransmitter enabling learning and memory
and also triggers muscle contraction
Achilles Reflex - CORRECT ANSWER: Tests S1 nerve root
Adams Test - CORRECT ANSWER: Forward bend to check asymmetry shoulder, ribs,
hips and waistline for scoliosis; high FP screening rate
Albumin Creatinine Ratio - CORRECT ANSWER: Indicated for DM patients; detects
proteinuria / CKD (30 - 300 indicates microalbinuria)
Anti DNase B Test - CORRECT ANSWER: Determines etiology of post-strep
glomerulonephritis
Anti-GBM GN - CORRECT ANSWER: Includes Goodpasture
,Antipolymer Antibody Assay - CORRECT ANSWER: Diagnostic test for fibromyalgia;
confirms disease in 50% of symptomatic patients
Anxiety Workup - CORRECT ANSWER: CBC, ESR, U Tox, TSH /T3/T4
Assault Workup - CORRECT ANSWER: Pelvic exam, rape kit; CBC, bHCG, UA;
cervical culture, HIV antibody, HBV antigen, KOH prep, VRDL; skeletal x ray survey,
head and abdominal CT
Back Pain Workup - CORRECT ANSWER: CBC, ESR, Ca++ & Vitamin-D levels, serum
immunoglobulins, rectal and prostate exam, X-ray lumbar AP & Lat view / MRI, DEXA
scan
Bedwetting Workup - CORRECT ANSWER: UA, urine culture, urine SG (1st morning),
renal U/S, genital exam
Bence-Jones Protein Detection Test - CORRECT ANSWER: 24-hour urine collection for
total protein w/protein electrophoresis and immunofixation
Beta D Glucan Test - CORRECT ANSWER: Determines presence of fungal infection in
CSF
Bleeding Time Test - CORRECT ANSWER: Test ability of platelets to adhere to capillary
endothelial lining using BP cuff under 40mmHg pressure; not performed for low PLT
counts
Bloody stool Workup - CORRECT ANSWER: CBC, fecal leukocytes, C difficile toxin,
abd CT, anoscopy, sigmoidoscopy, colonoscopy
Bloody Stools Workup - CORRECT ANSWER: CBC, ESR, fecal antigen, CD stool toxin,
CT abdomen, anoscopy, EGD, colonoscopy
, Bloody Urine Workup - CORRECT ANSWER: Genital, prostate and rectal exams, CBC,
BUN/Cr, electrolytes, UA, urine culture; Imaging: renal U/S, cystoscopy, abdominal CT
BP Cuff Length to Width Ratio - CORRECT ANSWER: 2:1 related to patient arm size
Calf Pain Workup - CORRECT ANSWER: CBC, D-dimers, PT/PTT, Doppler U/S, CXR,
CTA, ECG
Calprotectin - CORRECT ANSWER: Calcium and zinc protein, in feces; elevated level
acts as marker of GI inflammation a/w IBD
Castell's Sign - CORRECT ANSWER: Assesses splenomegaly; percuss lowest left
anterior axillary ICS; positive test if note changes to dull on full inspiration
CDI ELISA - CORRECT ANSWER: Diagnostic test of choice to diagnose
pseudomembranous entercolitis infection
Ceruloplasmin Test - CORRECT ANSWER: Detects brown/yellow ring around limbus of
eye (Wilson Disease)
Cervical Conization - CORRECT ANSWER: Includes cold knife and electrocautery /
LEEP excision of high - grade lesions at cervical transitional zone
CF Workup - CORRECT ANSWER: Trypsinogen AB (initial), pilocarpine Ionophoresis,
and chloride sweat test (performed on different days)
Chest Pain Workup - CORRECT ANSWER: CBC, ESR, Troponin I, CK-MB, EKG, D-
dimer and FDP, CXR, chest spiral CT, Doppler U/S, Arteriography and Venography
Chest Trauma Workup - CORRECT ANSWER: CBC, blood alcohol, U tox, sputum
Gram stain and culture, pulse Ox, head neck and chest x ray, head CT, neck MRI, abd
CT
