Ring-Shaped Nuclei on Leukoformula

Neutrophils with Annular Nuclei in Feline Sepsis

Thu, 23 Apr 2026 11:00:01 +0300

Neutrophils with annular nuclei in the blood of a cat with sepsis. These changes are considered toxic. Such cells are counted as band neutrophils in the leukocyte differential.

Ring-shaped Leukocyte Nuclei in Peripheral Blood Smears

Wed, 25 Jun 2025 20:08:00 +0300

A collection of micrographs of human blood cells with holes in the nucleus.

Reactive lymphocyte in EBV infection
Eosinophil dysplasia
Classify independently?
Classify independently?

Ring-shaped Neutrophil Nuclei in Feline Blood Smear

Sat, 14 Dec 2024 10:03:24 +0300

🔬Cat’s blood, 15 years old. Left nuclear shift. Characteristic “donut-shaped” neutrophil nucleus, 1000x magnification

🙏Images kindly provided by Amira Kuznetsova, hematologist at the VETLAB veterinary laboratory network, Moscow: Amira Kuznetsova

Toxic Neutrophil Changes in a Cat with Peritonitis

Sun, 27 Mar 2022 19:36:26 +0300

A cat was admitted to the hospital with a diagnosis of peritonitis and underwent surgery. On day 2 post-surgery, the complete blood count showed: WBC - 12.7x109/L RBC - 5.49x1012/L HGB - 84 g/L HCT - 25.5% MCV - 46.6 fL MCH - 15.3 pg MCHC - 329 g/dL RDW - 15% PLT - 34x1012/L MPV - 8.4 fL PDW - 16.8% PCT - 0.028% When calculating the leukocyte differential count (absolute values): Metamyelocytes - 0.254 Band neutrophils - 1.143 Segmented neutrophils - 10.922 Lymphocytes - 0.254 Monocytes - 0.127 x 109/L