雌激素受体（ER）常作为女性乳癌的标记物之一，在男性乳腺增生性病变，特别在男性乳癌中也有不同程度的表达。尽管男性乳腺发育和男性乳癌远较女性乳腺病变少见，了解其分布状态及其关系仍有较重要的临床意义。l材料和方法复习我科近年来6例男性乳腺发育和互例男性乳癌患者的 The estrogen receptor (ER) is often used as a marker for breast cancer in women and is also expressed to varying degrees in male hyperplasia of the breast, particularly in male breast cancer. Although male breast development and male breast cancer are far less common than female breast lesions, understanding the distribution and relationship between them still has important clinical significance. Materials and Methods Review of 6 cases of male breast development in our department in recent years