Lymphoma, Large-Cell, Anaplastic

**Definition:** A systemic, large-cell, non-Hodgkin, malignant lymphoma characterized by cells with pleomorphic appearance and expressing the CD30 ANTIGEN. These so-called hallmark cells have lobulated and indented nuclei. This lymphoma is often mistaken for metastatic carcinoma and MALIGNANT HISTIOCYTOSIS.

**Tree numbers:** - C04.557.386.480.750.399 - C15.604.515.569.480.750.600 - C20.683.515.761.480.750.399

**Synonyms:** - CD30+ Anaplastic Large-Cell Lymphoma - CD30-Positive Anaplastic Large-Cell Lymphoma - Ki-1 Lymphoma - Lymphoma, Large-Cell, Ki-1 - Anaplastic Large-Cell Lymphoma - Systemic Anaplastic Large-Cell Lymphoma