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==Description==
==Description==
Modified transudates are a type of effusion whose cell count and protein content are intermediate between a [[Transudate|transudate]] and an [[Exudate|exudate]]. In some cases, modified transudates may represent a transitional stage before the development of an exudate (as with uroabdomen, which begins as a modified transudate but develops into a chemical exudative peritonitis over time). Modified transudates arise as a result of disruptions to the endothelium or imbalances in the [[Control of Blood Pressure & Blood Flow - Anatomy & Physiology#Capillary Fluid Shift Mechanism |'''Starling forces''']]. Common causes include:
Modified transudates are a type of effusion whose cell count and protein content are intermediate between a [[Transudate|transudate]] and an [[Exudate|exudate]]. In some cases, modified transudates may represent a transitional stage before the development of an exudate (as with uroabdomen, which begins as a modified transudate but develops into a chemical exudative peritonitis over time). Modified transudates arise as a result of disruptions to the endothelium or imbalances in the [[Blood Pressure & Blood Flow Control - Anatomy & Physiology#Capillary Fluid Shift Mechanism |'''Starling forces''']]. Common causes include:
*'''Increased vascular hydrostatic pressure''' resulting from inappropriate activation of the renin-angiotensin-aldosterone system (RAAS) in '''portal hypertension''' or '''congestive heart failure'''.
*'''Increased vascular hydrostatic pressure''' resulting from inappropriate activation of the renin-angiotensin-aldosterone system (RAAS) in '''portal hypertension''' or '''congestive heart failure'''.
*'''Vasculitis''', caused by '''[[Feline Infectious Peritonitis|feline infectious peritonitis virus]]''' (FIPV) or '''neoplasia'''. ([[Feline Infectious Peritonitis|Further discussion of the effusion encountered with FIP.]])
*'''Vasculitis''', caused by '''[[Feline Infectious Peritonitis|feline infectious peritonitis virus]]''' (FIPV) or '''neoplasia'''. ([[Feline Infectious Peritonitis|Further discussion of the effusion encountered with FIP.]])