The echocardiogram in this patient demonstrated normal left atrial size and structure with no evidence of “smoke” or thrombi. The cranial and caudal mitral valve leaflets presented normal linear structure, extension in systole, and union in diastole. No significant dystrophic or vegetative changes were noted. The left ventricle presented normal free wall and septal thicknesses with linear contour. The chamber was neither dilated nor restricted. No septal deviation was noted neither into the left ventricular outflow tract, nor dilation into the right ventricle. The myocardium presented normal echogenicity without evidence of significant fibrotic or ischemic disease. Contractility of the ventricular walls was adequate and in normal range for this patient evidenced by the fractional shortening measurement. The left ventricular outflow tract demonstrated normal laminar flow without evidence of hemodynamically significant insufficiency or excessive outflow velocity. Subjective assessment of the right atrium and auricle revealed normal size, structure and content. No evidence of masses was noted. Tricuspid valvular assessment demonstrated linear morphology. The right ventricle was of normal size (1/3 diameter of LV), chordae structure, myocardial echogenicity and thickness. No evidence of dilation nor restriction was noted. Pulmonic tract assessment revealed normal valve structure, laminar flow, and diameter (approx.1:1 pa/ao ratio. A minor amount of pericardial effusion was noted. A moderate amount of pleural effusion was noted in the caudal thorax with echogenic fluid. Pleurocentesis was performed and found to be frank blood. Cranial mediastinal tissue thickening was noted in this patient. This is consistent with granulomatous disease such as FIP or neoplasia. Chronic infectious agents are also possible, yet less likely. The diaphragm was visualized without interruption.