Objective To discuss the clinical diagnosis and treatment of substernal benign thyroid tumor.

目的：探讨胸骨后良性甲状腺肿瘤的临床诊断和治疗方法。

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Results CD105 was not expressed in 30 cases of normal thyroid tissue and benign thyroid tumor.

结果正常甲状腺组织、良性甲状腺肿瘤组织标本30例，无cd105的表达。

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To investigate the role of fine needle aspiration cytology for the diagnosis of thyroid tumor.

探讨细针吸取细胞学检查对甲状腺肿物的诊断价值。

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Despite being told there was a 5% chance that chemotherapy would affect a tumor in the trachea, the tumor has become softer since treatment and has moved away from the thyroid gland, which makes it easier to remove surgically.

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