Overview
Impetigo follicularis, also known as ichthyosis follicularis with atrichia and photophobia (IFAP syndrome), is a rare X-linked genetic disorder characterized by follicular hyperkeratosis, atrichia (absence of hair growth), and photophobia. It results from mutations in the MBTPS2 gene, which is crucial for cholesterol homeostasis and endoplasmic reticulum (ER) stress response 1.Diagnosis
Genetic Testing: Identification of MBTPS2 gene mutations is essential for diagnosis 1.
Clinical Features: Presence of follicular hyperkeratosis, absence of hair growth, and sensitivity to light 1.
Biopsy: Skin biopsy may show characteristic histopathological features, though not diagnostic on its own 1.Management
Supportive Care: Emollients and moisturizers to manage skin dryness and hyperkeratosis 1.
Photoprotection: Use of sunscreens and protective clothing to mitigate photophobia and skin damage 1.
Genetic Counseling: Essential for families with affected individuals due to X-linked inheritance 1.Special Populations
Pediatrics: Early intervention with supportive care is crucial for managing symptoms and improving quality of life 1.
Comorbidities: No specific management guidelines provided for comorbidities in the context of IFAP syndrome 1.Key Recommendations
Confirm diagnosis through genetic testing for MBTPS2 mutations (Evidence: Strong 1).
Implement supportive care measures including emollients and photoprotection to manage symptoms (Evidence: Moderate 1).
Provide genetic counseling to affected families to understand inheritance patterns (Evidence: Expert opinion 1).References
1 Oeffner F, Fischer G, Happle R, König A, Betz RC, Bornholdt D et al.. IFAP syndrome is caused by deficiency in MBTPS2, an intramembrane zinc metalloprotease essential for cholesterol homeostasis and ER stress response. American journal of human genetics 2009. link