CXCR4 and marginal zone lymphoma: Nonetheless, given the fact that previous reports also indicated a link between signal strength on CXCR4-directed PET/CT and progression-free survival [2], the herein observed concordance on diagnostic scan parameters may pave the way for [68 Ga]Ga-PentixaFor PET in (interim) response assessment for MZL, e.g., by applying novel therapies [19].