Acrodermatitis continua of Hallopeau in Child
ACH most commonly affects women over the age of 35 but can rarely affect children. The exact etiology is unknown. Mutations in the IL36RN gene have been associated with the development of ACH and pustular psoriasis.
ACH often has a chronic, relapsing course. There are rare reports of ACH developing from and progressing to generalized pustular psoriasis. Nonetheless, psoriatic arthritis is not commonly seen with ACH.
L40.2 – Acrodermatitis continua
83839005 – Acrodermatitis continua of Hallopeau
Differential Diagnosis & Pitfalls
- Palmoplantar pustulosis – Unlike ACH, palmoplantar pustulosis may initially present as pustules on the palms and soles without distal digit or nail bed involvement.
- Dyshidrotic eczema – Lesions tend to be predominantly vesicles rather than pustules.
- Acute paronychia (bacterial, drug induced)
- Chronic paronychia
- Blistering distal dactylitis
- Herpetic whitlow
- Infected contact dermatitis