Hepatic myelolipoma incarcerated in a peritoneopericardial diaphragmatic hernia in a cat

• Published in: Australian veterinary journal Vol. 88; no. 6; pp. 231 - 235
• Main Authors: Wouda, R.M, Chalkley, M.D, Fraser, A.R, Moses, P.A.E
• Format: Journal Article
• Language: English
• Published: Melbourne, Australia Blackwell Publishing Asia 01.06.2010
• Subjects: adipose tissue; Animals; Cardiac Tamponade - complications; Cardiac Tamponade - diagnostic imaging; Cardiac Tamponade - pathology; Cardiac Tamponade - surgery; Cardiac Tamponade - veterinary; Cat Diseases - diagnostic imaging; Cat Diseases - pathology; Cat Diseases - surgery; Cats; Female; heart failure; hernia; Hernia, Diaphragmatic - complications; Hernia, Diaphragmatic - diagnostic imaging; Hernia, Diaphragmatic - pathology; Hernia, Diaphragmatic - surgery; Hernia, Diaphragmatic - veterinary; Histocytochemistry - veterinary; Liver Diseases - complications; Liver Diseases - diagnostic imaging; Liver Diseases - pathology; Liver Diseases - surgery; Liver Diseases - veterinary; myelolipoma; Myelolipoma - complications; Myelolipoma - diagnostic imaging; Myelolipoma - pathology; Myelolipoma - surgery; Myelolipoma - veterinary; peritoneopericardial diaphragmatic hernia; Ultrasonography
• ISSN: 0005-0423; 1751-0813
• DOI: 10.1111/j.1751-0813.2010.00578.x

Keywords:cats;myelolipoma;peritoneopericardial diaphragmatic hernia Hepatic myelolipoma incarcerated in a peritoneopericardial diaphragmatic hernia was diagnosed in an 11-year-old, desexed female Persian cat. The cat was initially referred for investigation of tachypnoea and dyspnoea. Peritoneopericardial diaphragmatic hernia is a common incidental finding in cats and is usually asymptomatic. Myelolipoma is an extremely rare benign tumour, composed of extramedullary haematopoietic cells and adipose tissue. Myelolipomas are hypothesised to result from metaplastic alteration, rather than a neoplastic process, although this theory cannot be substantiated. The present case is only the fourth report of such an unusual occurrence in cats and displays significant differences to previous reports. Hepatic entrapment and burgeoning of the mass within the pericardial sac resulted in cardiac tamponade and overt signs of right-sided cardiac failure. Surgical intervention was successful and despite concerns regarding the cat's clinical presentation and the gross appearance of the lesion(s), a good long-term outcome is anticipated.