This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune skin disorders, Subject name: Dental
[{'content': 'Erythema nodosum is seen in all of the following except - \nSelect and explain. \nA. Pregnancy, B. Tuberculosis, C. IMN, D. Chronic pancreatitis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Erythema nodosum Reaction pattern to various antigenic stimuli. Commonest variety of panniculitis Most common-females Age-20-30 years Causes: Infection Bacterial: streptococcal, tuberculosis,yeersiniaa,mycoplasma,LGV, salmonella, campylobacter Fungal : histoplasmosis, blastomycosis, coccidoidomycosis Parasitic: toxoplasmosis Viral: hepatitis B Drugs: sulfonanides,bromide, iodide,sulfonyl ureas, OC pills, penicillin,gold Malignancies: AML,Hodgkin and non-Hodgkin Sarcoidosis Ulcerative colitis and Crohn\'s disease,pregnancy,connective tissue disease. Clinical features Erythematous warm painful nodules 1-5cm slightly elevated Most common sites: bilaterally lower extremities-"shins", calves, thighs Erythematous,bluish lesions don\'t ulcerate but heal with hyperpigmentation Associated feature most common ahralgias of knees ankles Lofgren syndrome: fever, hilar adenopathy, ahritis and uveitis with erythema nodosum in sarcoidosis. Histopathology: septal panniculitis Treatment Treat the underlying cause NSAIDS IADVL textbook of dermatology page 1204', 'role': 'assistant'}]