Every blood question starts at the CBC.
Follow the algorithm. Tap any diagnosis for the mechanism, the labs, the exact way Step 1 asks it, and the trap that costs points. Built from real practice-exam patterns, not a textbook table of contents.
Seven ways into the blood.
Each algorithm opens one branch at a time. Click a question to see where it leads; click a diagnosis for the full card.
What the practice exams actually ask.
How many of the 4,171 practice items we analyzed involve each condition (the lighter number is how often it is the keyed answer). Bigger bar, bigger payoff. Tap a bar to open the card.
Dashed cards are questions. Solid colored cards are diagnoses; the segments show how often the practice exams test them. The green check means you marked it mastered.
Enter the findings. Watch the differential rank itself.
Click every clue in the stem: labs, smear, context. Each condition is scored on what fits, and penalized for what contradicts.
Break the cascade. Read the labs.
Pick a disease or drug. The blocked factors light up red and the PT, aPTT, thrombin time, bleeding time and mixing study update. Switch the test to see exactly which pathway it measures.
Forty cells, every one a diagnosis.
Illustrations are drawn in code for this chart: each one shows the one feature Step 1 wants you to notice. Tap a cell to see what it means, or test yourself.
The pairs Step 1 loves to confuse.
Every row is a discriminator. Tap a column header to open that condition, or build your own comparison.
See the clue. Name the diagnosis.
Cards come weighted toward what the exams test most. Mark what you know; it is saved in this browser.
Ask the books anything about blood.
Your question searches our Step 1 library (First Aid, Pathoma, Goljan, MedSchoolBro, Secrets in Color and more) and returns a short grounded brief with its sources. Great for the "why" behind a card.
The tables you keep re-making.
Iron studies, the heme pathway, the oxygen curve, where each cancer starts, genetics, markers and drugs. All interactive.
Read the iron panel like a story.
Pick a condition. The tubes fill to show relative levels. Notice how ferritin and TIBC move in opposite directions in the two big mimics.
Eight enzymes, five diseases.
Start in the mitochondrion, cross to the cytoplasm, and come back. Tap a step that has a card.
Shift the curve.
Right shift unloads oxygen. Left shift holds it. CO and methemoglobin shift left and cut capacity.
Every blood cancer starts somewhere on this tree.
Colored chips are the diseases that arise from that cell. Tap one to open the card.
Translocations and the markers that go with them.
Tap a row to open the disease.
Hematology drugs, mechanisms, toxicities and antidotes.
Cell illustrations are original drawings. For exam preparation only, not medical advice.
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