shadow_tr

Hematopathology — Image #10 — Toxic Granulation

 

Toxic Changes

Toxic Changes

This band reflects all the "toxic changes" seen in reactive neutrophils:

  1. Left shift (it's a band)
  2. Toxic granulation: Coarse purple primary granules
  3. Döhle bodies: Blue pigment in the cytoplasm and clearly seen at the cytoplasmic margin
  4. Cytoplasmic vacuolization.

A neutrophilic response to pyogenic bacteria can be seen within hours. The primary granules contain lysozymes - hydrolytic enzymes, defensins and peroxidase. Döhle bodies represent disintegrating endoplasmic reticulum. Vacuoles show where cytokines were released from storage vesicles. A very lacey or moth-eaten neutrophilic cytoplasm is seen with overwhelming infection. Occasionally the neutrophilic response is vigorous enough to elevate significantly the WBC to 30,000/µL or more, called a leukemoid reaction. A reactive left-shift includes myelocytes and meta-myelocytes, a few promyelocytes, but should not include blasts.

Tulane University, New Orleans, LA 70118 504-865-5000 website@tulane.edu