CHYLOTHORAX AND CHYLOUS ASCITES IN A DOG WITH MEDIASTINAL LYMPHANGIOSARCOMA

A 10-year-old, male toy poodle presented for evaluation of a progressi vely worsening, harsh, nonproductive cough. Chylous pleural effusion, lymphopenia, thrombocytopenia, normoblastemia, and recurrent subcutane ous bruising were diagnosed. Surgical exploration of the cranial media stinum revealed extensive, redundant connective tissue which was confi rmed by histopathology to be mediastinal lymphangiosarcoma (LAS), Duri ng surgical placement of a fenestrated silastic mesh for passive pleur operitoneal drainage, chylous ascites also was diagnosed. The patient was euthanized two days postoperatively due to persistent chylothorax, The etiopathogenesis of chylothorax and chylous ascites are discussed . Previous case reports of lymphatic endothelial neoplasia are reviewe d.