We herein present an overview of the upcoming 5^th edition of the World Health Organization Classification of Haematolymphoid Tumours focussing on lymphoid neoplasms. Myeloid and histiocytic neoplasms will be presented in a separate accompanying article. Besides listing the entities of the classification, we highlight and explain changes from the revised 4^th edition. These include reorganization of entities by a hierarchical system as is adopted throughout the 5^th edition of the WHO classification of tumours of all organ systems, modification of nomenclature for some entities, revision of diagnostic criteria or subtypes, deletion of certain entities, and introduction of new entities, as well as inclusion of tumour-like lesions, mesenchymal lesions specific to lymph node and spleen, and germline predisposition syndromes associated with the lymphoid neoplasms.

我们在此概述即将发布的第五版^{世界卫生组织}血淋巴肿瘤分类，重点关注淋巴肿瘤。骨髓和组织细胞肿瘤将在单独的随附文章中介绍。除了列出分类的实体外，我们还强调并解释了修订后的第四版的^变化。其中包括按照世界卫生组织所有器官系统肿瘤分类第五版中采用的分层系统对实体进行重组^、修改某些实体的命名、修订诊断标准或亚型、删除某些实体以及引入新实体，以及肿瘤样病变、淋巴结和脾脏特异的间质病变以及与淋巴肿瘤相关的种系易感综合征。