Overexpression of CXCR4 was detected with [68Ga]pentixafor PET/CT in lymphoplasmacytic lymphoma, marginal zone lymphoma, DLBCL, follicular lymphoma, mantle cell lymphoma, unclassified indolent B cell lymphoma, and EATL. The gene discussed is CXCR4; the disease is mantle cell lymphoma.