家畜乳腺癌以猫、狗最多发。国内虽有报道,也只限于局部;未见从初发,切除后再发以至最后广泛转移至肺和胸膜的记载。我们在工作中遇到一完整病例,兹报导如下。猫主人杨某,于86年3月收养一只无主母猫。当时见猫的右前肢内侧胸部皮肤出血、破溃,误认为是外伤所致,未予注意。后生两只小猫,哺乳、食欲均无异常,但胸部皮肤破溃处一直不愈合,且肿胀愈来愈大并有臭味。七月中旬来小动物门诊治疗,经检查:猫的精神尚好,营养中等,体温38℃;右胸部第一乳头内区有一蘑菇状肿物,大小为5×5×4 Breast cancer in cats, dogs, the most frequent. Although there are reports in the country, it is only limited to the local area. There is no record of extensive metastasis to the lungs and pleura from the beginning, resection, and finally to the last. We have encountered a complete case of our work and we have the following report. Yang cat owner, in March 86 adopted a motherless cat. At that time, see the cat’s right forelimb medial chest skin bleeding, ulceration, mistaken for the trauma caused, did not pay attention. Two young cats, breastfeeding, appetite were normal, but the chest skin ulceration has not healed, and the swelling is bigger and has a smell. In mid-July to small animal clinic treatment, the inspection: the cat’s spirit is still good, moderate nutrition, body temperature 38 ℃; right chest first nipple area has a mushroom-like tumor, the size of 5 × 5 × 4