juvenile polyposis

例句：

1. 1.Juvenile polyposis is a rare condition that affects young people.
   青少年息肉病是一种罕见疾病，影响年轻人。
2. 2. The patient was diagnosed with juvenile polyposis and required surgery.
   这位患者被诊断出患有青少年息肉病，需要进行手术。
3. 3. The symptoms of juvenile polyposis can include abdominal pain, diarrhea, and rectal bleeding.
   青少年息肉病的症状可能包括腹痛、腹泻和直肠出血。