midget-dwarf
Both are medical terms.
dwarf - disproportionate (condition: achondroplasia)
midget - proportionate (growth hormone or IGF-1 problems)
In American English, I believe both terms would be avoided by physicians and other professionals dealing with people with dwarfism.
The medical dictionary at the Merriam-Webster dictionary Web site lists "midget," but identifies it as "sometimes offensive."
I checked a couple of American-based medical Web sites aimed at the general public, Dr. Koop's site and that of the Mayo Clinic. The word "midget" is nowhere to be found in Dr. Koop's site. It occurs in the Mayo Clinic site under the article "Dwarfism," in the following context:
"Most people with dwarfism prefer not to be labeled. However, some people may refer to themselves as dwarfs or little people. The word 'midget' is considered a derogatory term."
Others can speak of the status of the terms "dwarf" and "midget" in other branches of English, but my advice is that if one is writing or speaking American English, one should avoid "midget" and should generally avoid "dwarf," substituting instead "man with dwarfism," "person with dwarfism," and so forth in medical contexts, and "little person" in nonmedical contexts. If issues of body proportion are relevant to the discussion, then the precise medical condition should be specified.