CASE REPORT A 9-year-old female Labrador Retriever was referred for evaluation of a 7-day history of exercise intolerance and dyspnoea. Thoracic radiographs showed moderate left atrial enlargement and severe pulmonary oedema. Transthoracic echocardiography revealed a heterogeneous hyperechoic mass extending from the left inflow tract to the outflow tract and protruding through the aortic ostium during systole. Spectral Doppler echocardiography was consistent with left ventricular inflow and outflow tract obstruction secondary to the mass. Because of the lack of response to treatment and the poor prognosis, the dog was euthanased and necropsy was performed. A large intracavitary mass, originating from the left ventricular free wall, filled the ventricular cavity. Mitral leaflets were distorted and thickened with shortened chordae. Microscopic findings were consistent with a rhabdomyosarcoma. CONCLUSION This report describes an intracavitary left ventricular rhabdomyosarcoma in a dog, causing left ventricle outflow tract obstruction and functional mitral stenosis that was clinically associated with pulmonary oedema.
Left-sided congestive heart failure in a dog with intraventricular rhabdomyosarcoma
Spina, F;Caivano, D;Lepri, E;Porciello, F;Birettoni, F.
2015
Abstract
CASE REPORT A 9-year-old female Labrador Retriever was referred for evaluation of a 7-day history of exercise intolerance and dyspnoea. Thoracic radiographs showed moderate left atrial enlargement and severe pulmonary oedema. Transthoracic echocardiography revealed a heterogeneous hyperechoic mass extending from the left inflow tract to the outflow tract and protruding through the aortic ostium during systole. Spectral Doppler echocardiography was consistent with left ventricular inflow and outflow tract obstruction secondary to the mass. Because of the lack of response to treatment and the poor prognosis, the dog was euthanased and necropsy was performed. A large intracavitary mass, originating from the left ventricular free wall, filled the ventricular cavity. Mitral leaflets were distorted and thickened with shortened chordae. Microscopic findings were consistent with a rhabdomyosarcoma. CONCLUSION This report describes an intracavitary left ventricular rhabdomyosarcoma in a dog, causing left ventricle outflow tract obstruction and functional mitral stenosis that was clinically associated with pulmonary oedema.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
