CXCR4 and myeloproliferative disorder: Recently, Kraus et al. evaluated the possibility of the C-X-C motif chemokine receptor 4 (CXCR4)-directed imaging with 68Ga-Pentixafor PET/CT, to diagnose and quantify disease involvement in 12 myeloproliferative neoplasms patients, together with 5 non-oncologic control patients.