In which condition is the Langerhans cell not the proliferating cell?

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In lichen planus, there is degeneration of the basal cell layer, sawtooth rete ridges, and a broad band of lymphocytes in the connective tissue immediately subjacent to the epithelium. Letterer-Siwe disease is an acute disseminated form of Langerhans cell disease. Hand-Schüller-Christian disease is a chronic disseminated or multifocal form of Langerhans cell disease. Eosinophilic granuloma is the solitary or chronic localized form of Langerhans cell disease.

In Which Condition Is the Langerhans Cell Not the Proliferating