Pressure alopecia - Hair and Scalp
Predisposing factors associated with PIA include postoperative stays, prolonged hospital stays, orthodontic headgear, surgical head and neck positioners, cervical collars, electroencephalogram monitoring, and recreational activity associated with a fixed posture. Other associations include long durations of immobilization, obesity, female sex, psychiatric or cardiovascular comorbidities, use of the Trendelenburg position, and intraoperative hypoperfusion / hypoxemia.
L65.9 – Nonscarring hair loss, unspecified
56317004 – Alopecia
Differential Diagnosis & Pitfalls