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  1. Abscess, cyst or tumour?

    Rat Health
    TL;DR: lump appeared overnight. Rat is from pet store with undisclosed health history. Lump is hard and does not seem to cause rat pain. No pus or drainage from lump or penis. Still eating, drinking, playing with cage mate. Is this a cyst, a preputial abscess, a regular abscess or a tumour? I...
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