Related Experiment Video
Updated: Aug 14, 2025

Mechanical and Controlled PRP Injections in Patients Affected by Androgenetic Alopecia
Published on: January 27, 2018
Perifolliculitis Capitis Abscedens et Suffodiens after Follicular Unit Transplantation: A Case Report
Lucia Genco1, Mariateresa Cantelli1, Mario Delfino1
1Section of Dermatology, Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy.
Introduction:
In the field of hair transplantation (HT) surgery, transplantation techniques from autologous tissue dominate. The most widely used techniques are follicular unit transplantation, also known as strip technique, and follicular unit extraction.
Case Presentation:
We report a case of an HT sequence of particular interest because of its unusual clinical presentation, chronic relapsing nature, and aggressiveness. The clinical presentation (fluctuating and communicating lesions in the occipital region), course, and symptomatology support the hypothesis of PCAS.
Discussion:
PCAS or folliculitis dissecans or Hoffmann's disease is a rare disorder of unknown etiology. We speculate that the mechanical extraction of follicular units was the trigger. This case underlines the need for further studies as cases of PCAS may increase concomitantly with the increase in HT.

