Folliculitis and Hair Loss

The patient is a 30 year-old man with a 2 year history of folliculitis and mild hair loss. He has erythematous papules and a few pustules scattered over the scalp. Cultures have been negative. Biopsy showed only inflammation c/w folloculitis. Minocycline has been of marginal help, but process recurrs when he stops. He has an occasional papule on his cheeks but no signs of rosacea. His hair is globally thin.

Question: Is this folliculitis decalvans? Would isotretinoin be worth trying? He is also interested in hair transplantation.