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 | ||