Acanthocytosis is a red cell phenotype associated with various underlying conditions. Acanthocytes (from the Greek word acantha, which means thorn), or spur cells, are spiculated red cells with a few projections of varying size and surface distribution
Acanthocyte (from the Greek word ἄκανθα acantha, meaning 'thorn'), in biology and medicine, refers to an abnormal form of red blood cell that has a spiked cell membrane, due to thorny projections.A similar term is spur cells. Often they may be confused with echinocytes or schistocytes.
Acanthocytes have coarse, weirdly spaced, variably sized crenations, resembling many-pointed stars. They are seen on blood films in, among others abetalipoproteinemia,liver disease, chorea acanthocytosis, McLeod syndrome, and several inherited neurological and other disorders, such as neuroacanthocytosis,anorexia nervosa, infantile pyknocytosis, hypothyroidism, idiopathic neonatal hepatitis, alcoholism, congestive splenomegaly, Zieve syndrome, and chronic granulomatous disease.[