The pathologic fluids are classed as transudates and exudates.
Ecchymoses may be present in large number, with exudates of false membrane, which Beaumont describes as aphthous.
The extent of diseased surface can only be conjectured by an inspection of the exudates and by abdominal palpation.
The surface becomes gummy and oily; the oily substances increases and exudates as the days pass.
These exudates are most frequently seen in carcinoma and tuberculosis of the peritoneum.
(c) Decomposition of exudates anywhere in the body, as in empyema, bronchiectasis, and large tuberculous cavities.