期刊
HISTOPATHOLOGY
卷 80, 期 4, 页码 616-626出版社
WILEY
DOI: 10.1111/his.14591
关键词
haematopathology; haemophagocytic lymphohistiocytosis; haemophagocytosis; HLH
Haemophagocytic lymphohistiocytosis is a complex and often underestimated immune dysregulation syndrome that can occur in various clinical scenarios. Timely and accurate diagnosis is crucial for patient survival, requiring a high level of clinical suspicion. The presence of haemophagocytosis in certain clinical situations should prompt consideration of this syndrome and further testing.
Haemophagocytic lymphohistiocytosis (HLH) is a complex, often under-recognised hyperinflammatory immune dysregulation syndrome arising in a diverse range of clinical scenarios and conditions. The accurate and timely diagnosis of HLH is crucial for patient survival, and usually requires a high level of clinical suspicion. The histological corollary to clinical HLH-haemophagocytosis-is neither necessary nor sufficient for the diagnosis of HLH, as it may be seen in a variety of reactive conditions and may be absent in true HLH. Nevertheless, the finding of haemophagocytosis in specific clinical situations should prompt consideration of HLH and further testing to exclude the condition. Although haemophagocytosis is traditionally described in bone marrow, identification of it in other tissues, including lymphoid, splenic, liver or neural tissue, can contribute importantly to the overall recognition of HLH. In this review we discuss the underlying pathophysiology and aetiologies of HLH, and the morphological aspects of haemophagocytosis and its associated histological findings in different tissues, and give a brief overview of diagnostic criteria and clinical evaluation.
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