本研究主要通过其临床表现，实验室检查和病理学特点，探讨其鉴别诊断。
This study will discuss the differential diagnosis of HNL through its clinical manifestations, laboratory tests and pathological features.
较成熟的诊断方式是影像学和病理学，实验室检查对诊断帮助不大。
It is the image, not the laboratory tests that contribute to the diagnosis and the final diagnosis relies on pathology.
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