So, basically, withholding information is not the same thing as lying, but depending on the situation, you will have to decide whether it is better to withhold the information or not.
HCH may refer to: Hampton Court House, an independent school in Surrey, UK. Hexachlorocyclohexane, a group of chemical compounds. Holmes Chapel railway station (National Rail station code), in Cheshire, England.
Haemophagocytic lymphohistiocytosis (HLH) is a rare blood disorder commonly found in young children. It is not a well understood disease and therefore can be difficult to treat. There are two types of HLH, primary and secondary.