Dermal Cystine Crystals: An Incidental Finding During Mohs Surgery
The American Journal of dermatopathology(2022)
摘要
Cystinosis is an autosomal recessive lysosomal storage disorder with intracellular cystine accumulation caused by mutations in the CTNS gene. We present a case of a 48-year-old woman with a history of cystinosis and squamous cell carcinoma treated with Mohs micrographic surgery where widespread deposition of cystine crystals were noted on frozen sections of the Mohs layers. These were rectangular to polygonal refractile crystals within the cytoplasm of dermal fibroblasts and macrophages which were highlighted by polarized light microscopy. This case illustrates the use of frozen section processing to demonstrate the presence of intracellular cystine crystals. Moreover, because patients with cystinosis may be predisposed to developing carcinomas postrenal transplantation, Mohs surgeons should be aware of this unusual phenomenon when evaluating the slides.
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关键词
cystinosis,Mohs surgery,histology,frozen sections
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