This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Skin
Lisch nodule is seen in: September 2012 
Select and explain. 
A. Von-Recklinghausens disease, B. Motor disease, C. Myasthenia gravis, D. Drug induced myopathy
A: Von-Recklinghausens disease
Answer: A: Von-Recklinghausens disease 
Explanation: Ans. A i.e. Von-recklinghausen's disease Dermatological signs and conditions associated Casal's necklace: Pellagra Berloque dermatitis: Cosemtics Calcinosis cutis: Scleroderma Crocodile skin: Icthyosis Iris pearls: Leprosy Obstruction of pilo-sebaceous glands: Acne vulgaris Micro-Munro abscess: Psoriasis Pautrier microabscess: Mycosis fungoides Max Joseph space: Lichen planus Basal layer degeneration/ Hydropic degeneration/ Liquefaction degeneration: Lichen planus (also in DLE, pemphigus etc.) Asboe Hansen sign (bulla spread sign): Pemphigus Dubios sign: Congenital syphilis 011endroff sign: Secondary syphilis