You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Commonest variety of pemphigus:- and explain in detail?
P. vulgaris is the most common It has a worldwide distribution M/C in middle aged adults, rare in children. Younger age at presentation in Indians compared to the West P. vegetans Benign variant of P. vulgaris (rare disease) 2 forms: Neumann and Hallopeau Involves interiginous areas and flexural surfaces P. foliaceous : less common, flacid subcorneal lesion with crusting and scaling on erosion over seborrheic areas. P. erythematous: variant of P. foliaceous with overlap with lupus erythematosus If 'vulgaris' is written at end then it is usually the most common variety of that disease