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A 12‐year‐old, intact, otherwise healthy 620‐g female chinchilla was presented with a protruding mass at the vaginal opening that had been noticed for 4 hours (Fig 1A). The animal was alert and tried to lick the external genital area. The vaginal membrane (which closes the vaginal orifice in chinchillas except at oestrous) was reduced revealing that the protruding mass was connected to the vaginal wall. A radiographic examination showed an oval, soft tissue density mass located caudoventral to the pelvis but no evidence of a uterine disorder (Fig 1B). Under general anaesthesia with a combination of midazolam, medetomidine and fentanyl used at recommended doses, the mass was ligated and resected at its base via the vagina. A simultaneous ovariohysterectomy was recommended, but the owner declined. The chinchilla received postoperative meloxicam and enrofloxacin and recovered uneventfully after surgery.