Pseudolymphoma
Simulators of B-cell lymphoma
Fully developed
| Nodular and/or diffuse infiltrate made up mostly of small lymphocytes within the dermis and, sometimes, in the upper part of the subcutaneous fat |
| Infiltrate usually denser in the upper part ("top heavy") or equally dense throughout |
| Epithelial and nonepithelial structures of adnexa tending to be spared |
| Vascularture within the dense infiltrate prominent, the number of thick-walled blood vessels lined by plump endothelial cells appearing to be increased in number |
| Infiltrate often mixed and containing plasma cells, histiocytes, and eosinophils, in addition to preponderant small lymphocytes |
| Lymphoid follicles present sometime (less than 5%) |
| "Tingible bodies"(polychrome bodies, lymphocytic nuclear "dust"), especially noticeable in germinal centers but also in their absence |
| Some lymphocytes with large nuclei and some in mitosis; strikingly abnormal lymphocytes not predominating in even a single high-power field |