NODULAR AND DIFFUSE DERMATITIS
DIFFUSE DERMATITS -
| Mast cells predominate | Urticaria pigmentosa, nodular | ||
| Abnormal leukocytes | Myelocytes | Extramedullary hematopoiesis | |
| Lymphocytes | Pseudolymphoma | ||
| Granulomas throughout the dermis and, sometimes, subcutaneous fat | Lymphoma, e.g., mycosis fungoides, granulomatous | ||