What is All the following are primary cutaneous diseases except: and explain in detail?
B i.e. Reiter's disease: Reiter's disease or syndrome is primarly a reactive polyahritisQ characterized by presence of non suppurative, painful, asymmetrical oligoahritis with or without urethritis, ureitis, conjunctivitis, oral ulcers and secondary cutaneous involvement in form of rashQ. Psoriasis, Bowen's disease (squamous cell carcinoma in situ), lichen planus and icthyosis are primary cutaneous diseases.