IL7R and myeloid sarcoma: In the IL7 pathway, IL7 interacts with IL7Rα and the gamma chain (γc) (CD132), forming the signaling complex.9 The IL7/IL7RA interaction is important for the maintenance of memory T-cells and the development, proliferation, and survival of B- and T-cells, especially CD+ T-cells, which are present in inflammatory lesions of MS patients.10