Abstract：
The number of men undergoing breast imaging has increased in recent years, according to some reports. Most male breast concerns are related to benign causes, most commonly gynecomastia. The range of abnormalities typically encountered in the male breast is less broad than that encountered in women, given that lobule formation rarely occurs in men. Other benign causes of male breast palpable abnormalities with characteristic imaging findings include lipomas, sebaceous or epidermal inclusion cysts, and intramammary lymph nodes. Male breast cancer (MBC) is rare, representing up to 1% of breast cancer cases, but some data indicate that its incidence is increasing. MBC demonstrates some clinical features that overlap with those of gynecomastia, including a propensity for the subareolar breast. Men with breast cancer tend to present at a later stage than do women. MBC typically has similar imaging features to those of female breast cancer, often characterized by an irregular mass that may have associated calcifications. Occasionally, however, MBC has a benign-appearing imaging phenotype, with an oval shape and circumscribed margins, and therefore most solid breast masses in men require tissue diagnosis. Histopathologic evaluation may alternatively reveal other benign breast masses found in men, including papillomas, myofibroblastomas, and hemangiomas. Radiologists must be familiar with the breadth of male breast abnormalities to meet the rising challenge of caring for these patients. ©RSNA, 2024 Supplemental material is available for this article.
摘要：
近年来，接受乳房成像的男性人数有所增加，根据一些报道。大多数男性乳房问题与良性原因有关，最常见的是男性乳房发育症。通常在男性乳房中遇到的异常范围不如在女性中遇到的异常范围广泛，考虑到小叶的形成很少发生在男性。具有特征性影像学表现的男性乳腺明显异常的其他良性原因包括脂肪瘤，皮脂腺或表皮包涵囊肿，和乳腺内淋巴结.男性乳腺癌（MBC）是罕见的，代表高达1%的乳腺癌病例，但是一些数据表明它的发病率正在增加。MBC表现出一些与男性乳房发育症重叠的临床特征，包括乳晕下乳房的倾向。患有乳腺癌的男性往往比女性晚。MBC通常具有与女性乳腺癌相似的影像学特征，通常以不规则的肿块为特征，可能有相关的钙化。偶尔,然而,MBC有良性表现的影像学表型,椭圆形和外接边缘，因此，男性大多数实性乳腺肿块需要组织诊断。组织病理学评估可能会发现男性中发现的其他良性乳腺肿块，包括乳头状瘤,肌纤维母细胞瘤,和血管瘤.放射科医生必须熟悉男性乳房异常的广度，以应对护理这些患者的日益严峻的挑战。©RSNA,2024补充材料可用于本文。
