Hematology

Reactive Lymphocytes in Infectious Mononucleosis

Morphology of reactive lymphocytes in a blood smear in infectious mononucleosis. Cytoplasmic marginal basophilia and differential diagnosis with blasts.

Blood smear: reactive lymphocytes with pronounced marginal basophilia
Blood smear: reactive lymphocytes with pronounced marginal basophilia

❗ The correct answer to the closed club of laboratory hematologists quiz: Reactive lymphocytes. Infectious mononucleosis. It is precisely with Epstein-Barr virus infection that such a significant number of reactive lymphocytes (55%) with marginal basophilia are found in the blood.

If you think distinguishing reactive lymphocytes from blasts is like telling twins apart in the dark 🔬🌙, don’t worry – you’re not alone!

✅ You can master the morphology of reactive lymphocytes without suffering with the help of our educational video lesson. Watch the trailer: REACTIVE LYMPHOCYTES→.

👉 The video lesson is available by subscription: ⭐ VK donut Leukocyte Formula or 💎 Level II - Band Neutrophil. A link with access to the lesson is automatically sent to you via private message after payment.

An outdated synonym: “atypical mononuclear cells”; it is better not to use it in practice as it causes confusion with atypical lymphocytes (lymphoma cells).

Congratulations to the winners! They receive a private invitation to the club of selected specialists. They are: Victoria Tomashevich Dd Ss Yulia Guseva We have sent the winners a private invitation to the closed club via private messages.