Most cases are X-linked recessive but there may be as many as three types. As well as a classical X-linked form, there is another type where females are partially affected and another where females have full IFAP symptoms. The gene or genes causing this disease are not known.
Ichthyosis follicularis with alopecia and photophobia syndrome
Ichthyosis with confetti
Ichthyosis bullosa of Siemens
Phytophotodermatitis
Hypotrichosis with juvenile macular dystrophy
Steroid rosacea
Lupus miliaris disseminatus faciei
Telangiectasia macularis eruptiva perstans