Background: Thyrotropin-secreting pituitary adenomas (TSHomas) are a rare cause of hyperthyroidism. Somatostatin (SST) analogs work by interacting with somatostatin receptors (SSTRs). This study aimed to evalua...Background: Thyrotropin-secreting pituitary adenomas (TSHomas) are a rare cause of hyperthyroidism. Somatostatin (SST) analogs work by interacting with somatostatin receptors (SSTRs). This study aimed to evaluate short-term preoperative octreotide (OCT) use in TSHoma patients and to investigate SSTR2 and SSTR5 expression and observe structural changes in tumor tissue. Methods: We reviewed records and samples from eight TSHoma patients treated between July 2012 and July 2015. We tested immunohistochemically for SSTR2/5 expression and examined TSHoma cells for morphological changes. Signed rank sum test was used to compare the efficacy of short-term preoperative OCT treatment. Results: OCT treatment (median time: 7.9 days, range: 3-16 days; median total dose: 1.8 mg, range: 0.94.2 mg) led to significant decrease in all patients' thyroid hormone levels (FT3 [nmol/L]: 8.33 [7.02, 12.29] to 4.67 [3.52, 5.37] [P = 0.008]; FT4 [pmol/L]: 25.36 [21.34, 28.99] to 16.66 [14.88, 21.49] [P = 0.016]; and TSH [gU/ml]: 5.80 [4.37, 6.78] to 0.57 [0.19, 1.24] [P = 0.008]). All the eight tumor specimens expressed high SSTR2 protein levels; 5/8 expressed high SSTRS, but 3/8 that expressed low SSTR5 presented a significantly higher TS H suppression rate (P = 0.036). Electron microscopy showed subcellular level impairments, including clumped nuclear chromatin and reduced cytoplasmic volume. Golgi complexes were observed in the OCT-treated TSHoma specimens. Conclusions: OCT can control hormone levels and damage the ultrastructure of tumor cells and organelles. Short-term response to OCT may be related to SSTR5 expression. Preoperative SST analog treatment for TSHoma could be considered as a combination therapy.展开更多
目的通过全面的症状体征、生化、影像及动态试验分析,探讨垂体促甲状腺激素瘤(TSH瘤)和甲状腺激素抵抗综合征(RTH)的诊断和鉴别诊断。方法回顾性分析2016年7月至2022年9月于郑州大学第一附属医院就诊的14例血清学表现为游离三碘甲状腺...目的通过全面的症状体征、生化、影像及动态试验分析,探讨垂体促甲状腺激素瘤(TSH瘤)和甲状腺激素抵抗综合征(RTH)的诊断和鉴别诊断。方法回顾性分析2016年7月至2022年9月于郑州大学第一附属医院就诊的14例血清学表现为游离三碘甲状腺原氨酸和(或)游离甲状腺素水平升高而促甲状腺激素浓度不低于正常值患者的临床资料。结果TSH瘤7例、RTH 7例,平均确诊年龄分别为40.0岁和26.6岁。13例患者因甲状腺毒症或偶发心慌症状就诊,部分伴垂体占位效应或生长发育异常;1例患者因颈部增粗就诊。3例TSH瘤患者的血清性激素结合球蛋白升高。垂体磁共振成像显示,7例TSH瘤患者均为大腺瘤、1例RTH患者存在微腺瘤。13例患者行奥曲肽抑制试验均被抑制,但TSH瘤和RTH 24 h/2 h TSH抑制率存在明显差异,分别为46.6%~83.9%和4.6%~28.8%。6例RTH患者存在甲状腺激素受体β亚基突变。结论促甲状腺激素不适当分泌综合征临床较为罕见,主要包括TSH瘤和RTH,两者诊断及鉴别需结合家族史、症状体征、检查检验、动态试验及基因检测等综合研判,其中奥曲肽抑制试验24 h/2 h TSH抑制率可有效鉴别TSH瘤与RTH。展开更多
目的总结甲状腺激素抵抗综合征(syndrome of resistance to thyroid hormone,RTH)和垂体促甲状腺激素瘤(thyrotropin-secreting pituitary adenoma,TSH瘤)的病例特点,分析奥曲肽抑制试验和大剂量地塞米松抑制试验对鉴别二者的临床应用价...目的总结甲状腺激素抵抗综合征(syndrome of resistance to thyroid hormone,RTH)和垂体促甲状腺激素瘤(thyrotropin-secreting pituitary adenoma,TSH瘤)的病例特点,分析奥曲肽抑制试验和大剂量地塞米松抑制试验对鉴别二者的临床应用价值,以此提高这两种疾病的诊疗水平。方法纳入2010年10月至2021年12月于湘雅医院住院期间临床诊断为RTH和TSH瘤患者22例,分析总结两种疾病各自的临床特点以及分别对不同试验的反应性。结果(1)TSH瘤患者的瘤体相较于RTH并发垂体瘤患者更大,在影像学上多表现为视交叉受压(P<0.05)。(2)在奥曲肽抑制试验中,RTH患者促甲状腺激素(TSH)抑制率比TSH瘤患者更低(P<0.05);在大剂量地塞米松抑制试验中,RTH患者TSH抑制率比TSH瘤患者更高(P<0.05)。(3)采用受试者工作特征(ROC)曲线计算TSH抑制率,结果显示奥曲肽抑制试验的灵敏度为91.9%,特异度为55.6%,此时TSH抑制率临界值为64.24%;大剂量地塞米松抑制试验的灵敏度为54.4%,特异度为89.0%,此时TSH抑制率临界值为65.73%。两种试验联合的灵敏度为77.8%,特异度为90.9%,具有更好的诊断价值(P<0.05)。结论联合奥曲肽抑制试验和大剂量地塞米松抑制试验对鉴别RTH与TSH瘤有一定的临床价值。TSH瘤比RTH并发垂体瘤更具占位效应和侵袭性。展开更多
文摘Background: Thyrotropin-secreting pituitary adenomas (TSHomas) are a rare cause of hyperthyroidism. Somatostatin (SST) analogs work by interacting with somatostatin receptors (SSTRs). This study aimed to evaluate short-term preoperative octreotide (OCT) use in TSHoma patients and to investigate SSTR2 and SSTR5 expression and observe structural changes in tumor tissue. Methods: We reviewed records and samples from eight TSHoma patients treated between July 2012 and July 2015. We tested immunohistochemically for SSTR2/5 expression and examined TSHoma cells for morphological changes. Signed rank sum test was used to compare the efficacy of short-term preoperative OCT treatment. Results: OCT treatment (median time: 7.9 days, range: 3-16 days; median total dose: 1.8 mg, range: 0.94.2 mg) led to significant decrease in all patients' thyroid hormone levels (FT3 [nmol/L]: 8.33 [7.02, 12.29] to 4.67 [3.52, 5.37] [P = 0.008]; FT4 [pmol/L]: 25.36 [21.34, 28.99] to 16.66 [14.88, 21.49] [P = 0.016]; and TSH [gU/ml]: 5.80 [4.37, 6.78] to 0.57 [0.19, 1.24] [P = 0.008]). All the eight tumor specimens expressed high SSTR2 protein levels; 5/8 expressed high SSTRS, but 3/8 that expressed low SSTR5 presented a significantly higher TS H suppression rate (P = 0.036). Electron microscopy showed subcellular level impairments, including clumped nuclear chromatin and reduced cytoplasmic volume. Golgi complexes were observed in the OCT-treated TSHoma specimens. Conclusions: OCT can control hormone levels and damage the ultrastructure of tumor cells and organelles. Short-term response to OCT may be related to SSTR5 expression. Preoperative SST analog treatment for TSHoma could be considered as a combination therapy.
文摘目的通过全面的症状体征、生化、影像及动态试验分析,探讨垂体促甲状腺激素瘤(TSH瘤)和甲状腺激素抵抗综合征(RTH)的诊断和鉴别诊断。方法回顾性分析2016年7月至2022年9月于郑州大学第一附属医院就诊的14例血清学表现为游离三碘甲状腺原氨酸和(或)游离甲状腺素水平升高而促甲状腺激素浓度不低于正常值患者的临床资料。结果TSH瘤7例、RTH 7例,平均确诊年龄分别为40.0岁和26.6岁。13例患者因甲状腺毒症或偶发心慌症状就诊,部分伴垂体占位效应或生长发育异常;1例患者因颈部增粗就诊。3例TSH瘤患者的血清性激素结合球蛋白升高。垂体磁共振成像显示,7例TSH瘤患者均为大腺瘤、1例RTH患者存在微腺瘤。13例患者行奥曲肽抑制试验均被抑制,但TSH瘤和RTH 24 h/2 h TSH抑制率存在明显差异,分别为46.6%~83.9%和4.6%~28.8%。6例RTH患者存在甲状腺激素受体β亚基突变。结论促甲状腺激素不适当分泌综合征临床较为罕见,主要包括TSH瘤和RTH,两者诊断及鉴别需结合家族史、症状体征、检查检验、动态试验及基因检测等综合研判,其中奥曲肽抑制试验24 h/2 h TSH抑制率可有效鉴别TSH瘤与RTH。
文摘目的总结甲状腺激素抵抗综合征(syndrome of resistance to thyroid hormone,RTH)和垂体促甲状腺激素瘤(thyrotropin-secreting pituitary adenoma,TSH瘤)的病例特点,分析奥曲肽抑制试验和大剂量地塞米松抑制试验对鉴别二者的临床应用价值,以此提高这两种疾病的诊疗水平。方法纳入2010年10月至2021年12月于湘雅医院住院期间临床诊断为RTH和TSH瘤患者22例,分析总结两种疾病各自的临床特点以及分别对不同试验的反应性。结果(1)TSH瘤患者的瘤体相较于RTH并发垂体瘤患者更大,在影像学上多表现为视交叉受压(P<0.05)。(2)在奥曲肽抑制试验中,RTH患者促甲状腺激素(TSH)抑制率比TSH瘤患者更低(P<0.05);在大剂量地塞米松抑制试验中,RTH患者TSH抑制率比TSH瘤患者更高(P<0.05)。(3)采用受试者工作特征(ROC)曲线计算TSH抑制率,结果显示奥曲肽抑制试验的灵敏度为91.9%,特异度为55.6%,此时TSH抑制率临界值为64.24%;大剂量地塞米松抑制试验的灵敏度为54.4%,特异度为89.0%,此时TSH抑制率临界值为65.73%。两种试验联合的灵敏度为77.8%,特异度为90.9%,具有更好的诊断价值(P<0.05)。结论联合奥曲肽抑制试验和大剂量地塞米松抑制试验对鉴别RTH与TSH瘤有一定的临床价值。TSH瘤比RTH并发垂体瘤更具占位效应和侵袭性。