A survey lateral abdominal radiograph was performed at the referring veterinary clinic, and a markedly enlarged uterus was noted. 11 We describe herein a case of IMHA in association with pregnancy in a cat that presented with the primary complaint of haemorrhagic vulvar discharge, and subsequently went on to show complete resolution of the anaemia within the 1.5 months following ovariohysterectomy (OVH).Ī 7-year-old female entire Birman was referred for further investigation of acute-onset haemorrhagic vulvar discharge. 10 Clinical presentation can range from gradual, compensated disease to rapid-onset, life-threatening anaemia. IMHA, or autoimmune haemolytic anaemia, as it is more commonly referred to in humans, has been well documented in pregnant women, with an estimated prevalence of one in 50,000 pregnancies. 4, 6 7 8– 9 As far as we are aware, IMHA in association with pregnancy has not been reported in cats. 4, 6 Other potential secondary causes, such as hereditary diseases (eg, pyruvate kinase deficiency), drugs (eg, acetaminophen, propylthiouracil, methimazole, famotidine), toxins (eg, onions), severe hypophosphataemia, pancreatitis and neoplasia (eg, lymphoma), have also been described. Infectious causes that have been identified include haemotropic mycoplasma infections (particularly Myco-plasma haemofelis), feline leukaemia virus (FeLV), feline infectious peritonitis and Babesia felis. 1 IMHA secondary to an underlying disease, most often with an infectious cause, is considered more common than primary/idiopathic IMHA in cats. 1 In a retrospective study of 180 anaemic cats, Korman et al identified immune-mediated haemolysis as an underlying cause in only 6.1% of cases. Immune-mediated haemolytic anaemia (IMHA) has generally been considered an uncommon to rare cause of anaemia in cats.

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