Kumar N, Jain S
Department of Pathology, Maulana Azad Medical College, New Delhi, India.
Acta Cytol. 2000 May-Jun;44(3):429-32. doi: 10.1159/000328492.
The presence of Liesegang rings (LRs) in cytologic specimens is a morphologic curiosity. The exact mechanism of formation and composition of these peculiar rings is a mystery. Their morphologic resemblance to parasites is well recognized and illustrated. Their association with calcium oxalate-like crystals and their presence in a tubercular lymph node are described for the first time below.
Giemsa-stained aspiration smears from an enlarged lymph node and two breast lumps showed purple rings of variable morphology resembling ova, larvae or adult parasites. Misdiagnosis of parasites was avoided by careful evaluation. In all three cases the LRs were associated with calcium oxalate-like crystals and were nonbirefringent.
LRs can be mistaken for ova, larvae or adult parasites. Awareness of their varied morphology is helpful in avoiding misinterpretation and overdiagnosis of parasitic lesions. The coexistence of LRs and crystals was an unusual finding in this study.
细胞学标本中莱氏环（LRs）的出现是一种形态学上的奇特现象。这些特殊环的形成和组成的确切机制仍是个谜。它们在形态上与寄生虫的相似性已得到充分认识和阐释。下文首次描述了它们与草酸钙样晶体的关联以及在结核性淋巴结中的存在情况。
对一个肿大淋巴结和两个乳腺肿块进行吉姆萨染色的穿刺涂片检查，结果显示出形态各异的紫色环，类似虫卵、幼虫或成虫寄生虫。通过仔细评估避免了对寄生虫的误诊。在所有这三个病例中，莱氏环均与草酸钙样晶体相关联，且无双折射现象。
莱氏环可能被误诊为虫卵、幼虫或成虫寄生虫。了解其多样的形态有助于避免对寄生虫病变的错误解读和过度诊断。在本研究中，莱氏环与晶体的共存是一个不寻常的发现。
