PTPRC and toxic epidermal necrolysis: Similar to TEN, the inflamed skin of patients with MPE was infiltrated by conventional T lymphocytes (63.8 ± 19.5% of hematopoietic CD45+ cells) and, to a lesser extent, by CD14+ monocytes (12.3 ± 8.1%) and NK cells (4.8 ± 5.8%) (Fig. 1B1).