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Although an uncommon location, cutaneous mucinoses may present in the pretibial area in distinct clinical circumstances. The terms pretibial myxedema and pretibial mucinosis often are used interchangeably, but pretibial myxedema should be regarded as a type of pretibial mucinosis. We present a case of cutaneous mucinosis localized to the pretibial area of a patient without Graves disease.

We describe an outbreak of rat mite dermatitis that affected 15 employees of an animal research facility. Cases of rat mite dermatitis are infrequently reported, and outbreaks are reported even less. Our case series demonstrates that in contrast to most prior outbreaks, rat mite dermatitis may occur even in modern, well-maintained physical surroundings and thus remains a relevant diagnosis today.