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Acute haemolysis
<p>Acute haemolysis: fragmented red cells (F), spherocytes (S) and free haemoglobin (= reddish smears) in a patient with gas gangrene, caused by Clostridium perfringens. (The acanthaceous appearing cells are no acanthocytes but red blood cells on the verge of disintegration.) </p>
Acute myeloid leukaemia (AML-M4)
<p>White blood cell count of 170,000/μL in acute myeloid leukaemia (AML-M4).</p>
Acute myeloid leukaemia (AML)
<p>Blasts (33% in total) with Auer rods (->) in the peripheral blood (May-Grünwald-Giemsa stain) are sufficient proof of an acute myeloid leukaemia (AML).</p>
Acute T lymphoblastic leukaemia (T-ALL)
<p>White blood cell concentration 180,000/μL. Despite intensive search no granulocytes were detectable. Diagnosis: acute T lymphoblastic leukaemia
</p>
<p>(T-ALL).</p>
Agglutinated red blood cells and marked polychromasia
<p>Agglutinated red blood cells and marked polychromasia in a patient with haemolytic anaemia caused by cryoglobulins in Waldenström's macroglobulinaemia.</p>
Anisocytosis of platelets
<p>EDTA blood sample after one day of storage, which results in obvious anisocytosis of the platelets.</p>
Atypical lymphocyte
<p>On the top right a morphologically atypical lymphocyte of a healthy individual with the abnormality resulting from prolonged storage of the EDTA blood (24 hours).</p>
Atypical lymphocytes suspected reactive
<p>Cell description:
</p>
<p>Size: larger than normal lymphocytes
</p>
<p>Nucleus: oval, variable chromatin condensation
</p>
<p>Cytoplasm: Diffluent, often around red blood cells</p>
Atypical promyelocyte in peripheral blood
<p>Atypical promyelocyte in peripheral blood in a patient with AML-M3.</p>