NODULAR AND DIFFUSE DERMATITIS

NODULAR - HISITOCYTES PREDOMINATE - SARCOIDAL

Interface, lichenoid Few foci in dermal papillae Lichen nitidus
Periadnexal infiltrate, necrotic epidermal keratinocytes Lichen striatus
Many foci in papillary dermis, no epidermal change Sarcoidosis
Dermal Subcutaneous No foreign body "Naked tubercle" Sarcoidosis
Croh'sdisease
Melkersson-Rossenthal syndrome
Foreign body Polarizable Silica granuloma
Nonpolarizable Tattoo material
Perifollicular Rosaces, granumatous
Perineural Leprosy, tuberculoid and dimorphous