ICD-11 definition : Dissecting cellulitis is a destructive inflammatory disorder of the scalp characterized
by widespread perifolliculitis with dermal abscess and sinus tract formation and extensive
scarring. It occurs predominantly in black males aged between 18 and 40 years. It
may be associated with hidradenitis suppurativa and acne conglobata (follicular occlusion
triad), and with pilonidal sinus. Painful swellings develop around the vertex of the
scalp and coalesce to form irregular undulating oedematous ridges and furrows. With
time an extensive network of sinuses discharging pus may develop. Progressive scarring
and permanent alopecia ensue.;
ICD-11 synonym : Dissecting folliculitis; Perifolliculitis capitis abscedens et suffodiens;
Dissecting cellulitis is a destructive inflammatory disorder of the scalp characterized
by widespread perifolliculitis with dermal abscess and sinus tract formation and extensive
scarring. It occurs predominantly in black males aged between 18 and 40 years. It
may be associated with hidradenitis suppurativa and acne conglobata (follicular occlusion
triad), and with pilonidal sinus. Painful swellings develop around the vertex of the
scalp and coalesce to form irregular undulating oedematous ridges and furrows. With
time an extensive network of sinuses discharging pus may develop. Progressive scarring
and permanent alopecia ensue.