Hair regeneration from transected follicles in duplicative surgery: rate of success and cell populations involved.

Background: The use of bisected hair follicles in hair transplantation has been previously reported, but the capacity of each half to regenerate the entire hair has not been clarified.

Objective: To evaluate duplicative surgery rate of success and to analyze the cell populations involved in hair regeneration.

Methods: We screened 28 patients undergoing duplicative surgery.

The legacy of Capt. Gino Pieri: a forgotten Italian contribution to the study of cutaneous blood supply during World War I.

Among the many scientists who studied the cutaneous blood supply, Gino Pieri, an Italian Army surgeon operating during World War I, deserves attention. During those times, amputations were frequent, and flaps used to cover stumps were often inadequately designed and became necrotic, because of poor knowledge of the skin's blood supply. Pieri solved the problem after drawing a perforator map of human body skin, injecting the main arteries with methylene blue dye.