Castleman disease must be distinguished from other disorders that can demonstrate Castleman-like lymph node features, including reactive lymph node hyperplasia, autoimmune disorders, and malignancies.
Relative humidity (abbreviated RH) is the ratio of the partial pressure of water vapor to the equilibrium vapor pressure of water at the same temperature. Relative humidity depends on temperature and the pressure of the system of interest.
Submitted by uk.sci.weather on Wed, 17/01/2007 - 12:50pm. Absolute Humidity, often just referred to as 'the humidity', is a measure of the actual amount of water vapour in a particular sample of air: measured as a partial pressure (vapour pressure/hPa or millibars); a mixing ratio (gm water vapour/kg of dry air), dew point etc.