查了这些可能的情况,都不象。蛔虫也不象。

除重金属外,似乎下面的都不对症

Blue/purple patches may be haemangiomas (will blanch with pressure), Kaposi's sarcoma (will not blanch) or purpura/ecchymoses (non-blanching, usually smaller lesions). Other rarer causes include heavy-metal toxicity or Peutz-Jeghers syndrome.

venous lake 也不象。

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