Vellus Hair In Transplanted Recipient Site?

That seems very strange. I would need to see patient in person to know for sure but perhaps some of the hairs were "challenged" during the extraction process.Treating with laser could possibly make them stronger etc...

In general transplanted hairs grow and take the characteristics of donor hair.  If normal scalp hair was harvested, you should not have thin / short (as you call it velus) hairs growing.  One exception may be your donor hair was not a good healthy supply.  It is best to follow up with your doctor.

onyx54,What area was used for donor harvest? It is not likely that it is a villus hair may be thin hair, does the transplanted hair not grow? Sincerely,Bernardino Arocha, MD

There is no concept as "exclusive vellus hair transplant" ...FUE surgen have to choose mature hair roots on safe donor area that are matured well ...If we accept your comments true about surgical result (without pictures?) , post FUE - short, thin, sparse hair appeared in transplant area after 10th month means surgeon is unexperienced on FUE. Reason of that poor  result may be low number of harvest  (because of poor donor area of patient???), harvesting from unsafe donor area or poor implanting and/or storing conditions of clinic/staff/surgeon. Consequently that causes low density and sparce hair appearence ..

What I normally do when I perform any frontal hair transplant is I place the smallest one hair grafts in the leading edge of the hairline. I generally place 500 or so grafts to create a wide transition zone so that the exact hairline location can not be seen.  Of those 500 hairs, only some of them will be fine and those are placed at the leading edge. One can not transplant exclusively vellus hair