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.
MCH stands for mean corpuscular hemoglobin. It refers to the quantity of hemoglobin in red corpuscles. To have your MCH blood test results explained you would need to visit the doctor. MCH is determined by the percentage of red cells and the amount of hemoglobin present in blood.