Abstract
It is extremely unusual for gastric cancer to metastasize to the mammary gland, a site where metastasis is known to be generally rare. This paper reports a resent case of metastasis of gastric cancer to the mammary gland. The case was a 29-year-old woman, who was diagnosed as having a non-resectable gastric canser (Boor 4, undifferentiated adenocarcinoma) in January 1987 and underwent chemotherapy. A painless flat mass mesuring 30×25 mm was palpated in the A region of the right mammary gland in March of that year. Mammography revealed no tumor shadow, but ultrasonography showed a low-echo area with clear margins. From cytology of needle biopsy specimens, a dignosis of metastatic gastric cancer was made, on the basis of the characteristic features of the tumor cells and their arrangement. Despite chemotheraphy and radiotherapy, the patient died of carcinomatous lymphopathy 5 months after the manifestation of the metastatic cancer in the mammary gland. The limphatic route was speculated to have been responsible for the metastasis.
