Gray-Zone Lymphoma

**Semantic type:** Neoplastic Process

**Definition:** A group of lymphomas displaying molecular, morphologic, immunophenotypic, and clinical overlap between classic Hodgkin lymphoma and diffuse large B-cell lymphoma. This term particularly applies to mediastinal lymphomas with overlapping features of mediastinal (thymic) large B-cell lymphoma and classic Hodgkin lymphoma.

**Synonyms:** - B-Cell Lymphoma, Unclassifiable, with Features Intermediate between Diffuse Large B-Cell Lymphoma and Classic Hodgkin Lymphoma - B-Cell Lymphoma, Unclassifiable, with Features Intermediate between Diffuse Large B-Cell Lymphoma and Classic Hodgkin Lymphoma - B-Cell Lymphoma, Unclassifiable, with Features Intermediate between Diffuse Large B-Cell Lymphoma and Classic Hodgkin Lymphoma - B-Cell Lymphoma, Unclassifiable, with Features Intermediate between Diffuse Large B-Cell Lymphoma and Classical Hodgkin Lymphoma - B-cell lymphoma, unclassifiable, with features intermediate between diffuse large B-cell lymphoma and classical Hodgkin lymphoma - Gray Zone Lymphoma - Hodgkin-Like Anaplastic Large Cell Lymphoma - Large B-Cell Lymphoma with Hodgkin Features