🩸 Microcytic Anemias: Causes, Labs, and Mnemonics You’ll Remember

Microcytic anemias are defined by a mean corpuscular volume (MCV) < 80 fL and are often confusing on exams due to overlapping lab features. The good news? Once you memorize the TICS mnemonic, understand the core lab patterns (iron, ferritin, TIBC), and master the clinical presentations—you’ll breeze through every vignette.

🎯 Causes of Microcytic Anemia

Mnemonic: TICS

Letter	Cause	Key Features
T	Thalassemia	↓ MCV, normal iron, ↑ RBCs
I	Iron Deficiency	↓ iron, ↑ TIBC, ↓ ferritin
C	Chronic Disease (late)	↓ iron, ↓ TIBC, ↑ ferritin
S	Sideroblastic Anemia	↑ iron, ringed sideroblasts on marrow

🧠 Bonus: “TAILS” adds Lead Poisoning (L) and ACD (A)

🧪 High-Yield Lab Comparison

Parameter	Iron Deficiency	Thalassemia	ACD	Sideroblastic
Iron	↓	Normal	↓	↑
Ferritin	↓	Normal / ↑	↑	↑
TIBC	↑	Normal	↓	Normal
RDW	↑	Normal	Normal	↑
Peripheral Smear	Hypochromic, target cells	Target cells	Normochromic or microcytic	Basophilic stippling

🩺 Clinical Clues That Show Up on Exams

• Iron Deficiency: Pica, koilonychia, blood loss (GI, menorrhagia)

• Thalassemia: Mediterranean descent, normal iron, family history

• ACD: Seen in RA, lupus, CKD, cancer; normo → micro over time

• Sideroblastic: Alcoholics, B6 deficiency, isoniazid use

📌 KOTC's question bank includes "Identify-the-lab-set" timed questions.

🔍 How to Work Through a Vignette

1. Look at the MCV → If < 80 → Think TICS

2. Check iron/ferritin/TIBC → Match the pattern

3. Scan for clues → Ethnicity, GI bleed, chronic illness

4. Use smear features + RDW → Refine diagnosis

📌 Before You Go…

Think small cells. Think smart choices.

🎯 Call-to-Action (CTA)

Use KOTC’s hematology visuals, adaptive lab matching quizzes, and TICS-based MCQs to dominate anemia on Step 1 and in clinic.
👉 Get started now

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Frequently Asked Questions (FAQs)

• How many hours should I study for the MCAT each day?

  Aim for 4-6 focused hours, ensuring you incorporate breaks to avoid burnout.

• What is the best way to handle test anxiety?

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