CONCURRENT LYMPHANGIOMA, IMMUNE-MEDIATED THROMBOCYTOPENIA, AND VON WILLEBRANDS DISEASE IN A DOG

Lymphangioma, immune-mediated thrombocytopenia (IMT), and von Willebra nd's disease (vWD) were diagnosed by histology, hematology, and a coag ulation profile in a 14-month-old, female dachshund. Clinical and labo ratory findings included ecchymotic inguinolabial swelling, thrombocyt openia, positive platelet factor-3 assay, prolonged buccal mucosal ble eding time, and subnormal von Willebrand factor antigen concentration and factor VIII activity. The IMT resolved with immunosuppressive gluc ocorticoid therapy Histologic examination identified lymphangioma whic h was too extensive for surgical excision. The history and the clinica l and laboratory findings were consistent with congenital vWD, althoug h acquired vWD secondary to lymphangioma could not be ruled out.