Acanthocyte

Also known as Spur Cell is an RBC with irregular thorn-like projections. Looks like "Cowboy Boot Spurs". These RBCs may be seen in some peripheral smears due to artifacts or may be associated with certain conditions including Abetalipoproteinemia, Liver disease, Malnutrition, Hypothyroidism, Asplenia, and McLeod Phenotype of Kell blood group, etc.