Gross Appearance o Rare only a single, usually many exist o Well-circumscribed, nonencapsulated pseudocapsule pseudocapsule is present 假包膜 o The consistency is usually firm or even hard except when degeneration or hemorrhage has occurred o color: light gray or pinkish white o cut section: an intertwining pattern or a whorl-like arrangement bung. 2003-11-3 6
2003-11-3 6 Gross Appearance Rare only a single，usually many exist Well-circumscribed，nonencapsulated A pseudocapsule is present. The consistency is usually firm or even hard except when degeneration or hemorrhage has occurred. color：light gray or pinkish white cut section：an intertwining pattern or a whorl-like arrangement； bulgy pseudocapsule 假包膜
Smooth muscle tumors of the uterus are often multiple. Seen here are submucosal, intramural and subserosal leiomyomata of the uterus 2003-11-3
2003-11-3 7 Smooth muscle tumors of the uterus are often multiple. Seen here are submucosal, intramural, and subserosal leiomyomata of the uterus
Microscopic Appearance Q Composition: smooth muscle connective tissue o The nonstriated muscle fibers are arranged in bundles of various sizes that run in multiple directions 2003-11-3 8
2003-11-3 8 Microscopic Appearance Composition：smooth muscle connective tissue The nonstriated muscle fibers are arranged in bundles of various sizes that run in multiple directions
Classification(1) According to growth location Myomas on the body of uterus(90%) Myomas on the cervix of uterus (10%) 2003-11-3
2003-11-3 9 Classification（1） According to growth location： • Myomas on the body of uterus（90%） • Myomas on the cervix of uterus（10%）
Classification(2 According to the relation to uterine muscle Submucous (10 15%) Intramural(60%) Subserosal(20%) Few leiomyomas are actually of a single pure type hybrids 2003-11-3
2003-11-3 10 Classification（2） According to the relation to uterine muscle： • Submucous（10 ～ 15%） • Intramural（60 ～ 70%） • Subserosal（20%） Few leiomyomas are actually of a single “pure” type. — hybrids