ALK+ large B cell lymphoma presenting as multiple bowel‐obstructing, cytokeratin‐positive tumours.

Keywords: ALK; ALK-positive large B-cell lymphoma; CD30; cytokeratin; large B-cell; lymphoma EN ALK ALK-positive large B-cell lymphoma CD30 cytokeratin large B-cell lymphoma 1128 1130 3 05/24/22 20220601 NES 220601 Introduction We present a rare case of anaplastic lymphoma kinase (ALK)-positive large B cell lymphoma (LBCL), unusual by its exclusive presentation as multiple bowel-obstructing submucosal masses and by its aberrant immunophenotype, including diffuse expression of cytokeratin (CK)AE1/AE3 (perinuclear-dot), as well as CD30, CD4 and cytotoxic molecules. ALK, cytokeratin, lymphoma, ALK-positive large B-cell lymphoma, CD30, large B-cell ALK+ large B cell lymphoma presenting as multiple bowel-obstructing, cytokeratin-positive tumours. [Extracted from the article]