Cabot rings are thin, red-violet staining, threadlike strands in the shape of a loop or figure-8 that are found on rare occasions in red blood cells (erythrocytes). They are believed to be microtubules that are remnants from a mitotic spindle, and their presence indicates an abnormality in the production of red blood cells.Cabot Rings, considerably rare findings, when present are found in the cytoplasm of red blood cells and in most cases, are caused by defects of erythrocytic production and are not commonly found in the blood circulating throughout the body.
Cabot rings appear as ring, figure-8 or loop-shaped structures on microscopy. Cabot rings stain red or purple with Wright's stain.
- McPherson, Richard A; MR Pincus. Henry's clinical diagnosis and management by laboratory methods (22nd ed.). Philadelphia, PA: Elsevier/Saunders. p. 526. ISBN 978-1437709742.
- "Cabot Rings - LabCE.com, Laboratory Continuing Education". www.labce.com. Retrieved 2017-05-04.
- "Cabot's Rings". www.chronolab.com. Archived from the original on 2018-05-14. Retrieved 2017-05-04.