What is the definition or description of: unexplained weight loss?

Unexplained wt loss.: 32 M asks What is the definition or description of: Unexplained weight loss? ANS: weight loss that cannot be explained by any detailed medical history, detailed physical exam and laboratory testing for every known cause. So a very expensive diagnosis to arrive at due to the many tests that must be done to exclude every possible cause. Often used as a waste basket diagnosis. That is pulled out of..