Anaplastic large cell lymphoma (ALCL) is a rare and aggressive peripheral T-cell non-Hodgkin lymphoma, belonging to the group of CD30-positive lymphoproliferative disorders, which affects lymph nodes and extranodal sites. It is comprised of two sub-types, based on the expression of a protein called anaplastic lymphoma kinase (ALK): ALK positive and ALK negative ALCL. The disease is anaplastic large cell lymphoma (Monarch Disease Ontology term MONDO_0020325). Also known as: ALCL, CD30 Positive anaplastic large cell lymphoma, CD30 positive anaplastic large cell lymphoma, Ki-1 lymphoma, Ki-1 positive anaplastic large cell lymphoma, Ki-1+ ALCL, Ki-1+ anaplastic large cell lymphoma, primary systemic ALCL.