39659
Porokeratosis palmaris et plantaris disseminata is characterized by skin lesion s that are superficial , small , relatively uniform , and demarcated by a distinct peripheral ridge of no more than 1mm in height .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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