<strong>Introduction:</strong> Metastasis to the thyroid gland is rarely encountered and usually detected after the diagnosis of the primary tumor. The most common sites of primary are breast, kidney, and ...<strong>Introduction:</strong> Metastasis to the thyroid gland is rarely encountered and usually detected after the diagnosis of the primary tumor. The most common sites of primary are breast, kidney, and lung. Prostate has been rarely reported as primary site. Here is reported a case of thyroid metastasis revealing prostate adenocarcinoma. <strong>Case summary:</strong> A 59-year-old man was admitted for pulmonary embolism. CT scan showed a hypertrophy of left thyroid lobe, and ultrasonography of the neck revealed cervical nodes. Thyroid function tests were within normal limits. Total thyroidectomy associated to cervical nodes dissection was done. There was no postoperative complication. Histopathological examination of the surgical specimen concluded to a papillary carcinoma. Then, immunohistochemistry examination revealed prostatic metastatic adenocarcinoma to lymph node and thyroid gland. The patient was treated by androgen deprivation therapy. After thirty three months of follow-up, he is still in good condition with stable disease. <strong>Conclusion:</strong> This case suggests thyroid cancer might be metastasis, and more frequent than known. Surgical specimen of thyroidectomy requires further histological examination such as immunohistochemistry to document primary tumor. Prostate is one of the primary, despite not the most common.展开更多
Gastric metastases from lung adenocarcinoma are rare. Because gastric metastasis grossly resembles advanced gastric cancer, it is difficult to diagnose gastric metastasis especially when the histology of the primary l...Gastric metastases from lung adenocarcinoma are rare. Because gastric metastasis grossly resembles advanced gastric cancer, it is difficult to diagnose gastric metastasis especially when the histology of the primary lung cancer is adenocarcinoma. We describe a case of gastric metastasis from primary lung adenocarcinoma mimicking Borrmann type Ⅳ primary gastric cancer. A 68-year-old man with known lung adenocarcinoma with multiple bone metastases had been experiencing progressive epigastric pain and dyspepsia over one year. Esophagogastroduodenoscopy revealed linitis plasticalike lesions in the fundus of the stomach. Pathologic examination revealed a moderately differentiated adenocarcinoma with submucosal infiltration. Positive immunohistochemical staining for thyroid transcription factor-1(TTF-1) and napsin A(Nap-A) confirmed that the metastasis was pulmonary in origin. The patient had been treated with palliative chemotherapy for the lung cancer and had lived for over fifteen months after the diagnosis of gastric metastasis. Clinicians should be aware of the possibility of gastric metastasis in patients with primary lung adenocarcinoma, and additional immunohistochemical staining for Nap-A as well as TTF-1 may help in differentiating its origin.展开更多
文摘<strong>Introduction:</strong> Metastasis to the thyroid gland is rarely encountered and usually detected after the diagnosis of the primary tumor. The most common sites of primary are breast, kidney, and lung. Prostate has been rarely reported as primary site. Here is reported a case of thyroid metastasis revealing prostate adenocarcinoma. <strong>Case summary:</strong> A 59-year-old man was admitted for pulmonary embolism. CT scan showed a hypertrophy of left thyroid lobe, and ultrasonography of the neck revealed cervical nodes. Thyroid function tests were within normal limits. Total thyroidectomy associated to cervical nodes dissection was done. There was no postoperative complication. Histopathological examination of the surgical specimen concluded to a papillary carcinoma. Then, immunohistochemistry examination revealed prostatic metastatic adenocarcinoma to lymph node and thyroid gland. The patient was treated by androgen deprivation therapy. After thirty three months of follow-up, he is still in good condition with stable disease. <strong>Conclusion:</strong> This case suggests thyroid cancer might be metastasis, and more frequent than known. Surgical specimen of thyroidectomy requires further histological examination such as immunohistochemistry to document primary tumor. Prostate is one of the primary, despite not the most common.
文摘Gastric metastases from lung adenocarcinoma are rare. Because gastric metastasis grossly resembles advanced gastric cancer, it is difficult to diagnose gastric metastasis especially when the histology of the primary lung cancer is adenocarcinoma. We describe a case of gastric metastasis from primary lung adenocarcinoma mimicking Borrmann type Ⅳ primary gastric cancer. A 68-year-old man with known lung adenocarcinoma with multiple bone metastases had been experiencing progressive epigastric pain and dyspepsia over one year. Esophagogastroduodenoscopy revealed linitis plasticalike lesions in the fundus of the stomach. Pathologic examination revealed a moderately differentiated adenocarcinoma with submucosal infiltration. Positive immunohistochemical staining for thyroid transcription factor-1(TTF-1) and napsin A(Nap-A) confirmed that the metastasis was pulmonary in origin. The patient had been treated with palliative chemotherapy for the lung cancer and had lived for over fifteen months after the diagnosis of gastric metastasis. Clinicians should be aware of the possibility of gastric metastasis in patients with primary lung adenocarcinoma, and additional immunohistochemical staining for Nap-A as well as TTF-1 may help in differentiating its origin.
