Publications by authors named "Shinichi Sumitomo"

We report here a rare case of primary hyperparathyroidism that was associated with an ectopic parathyroid adenoma located in the mediastinum. A 66-year-old woman suffering from primary hyperparathyroidism had been followed-up on an outpatient basis for over 10 years. She suffered from persistent urolithiasis and osteopenia due to hypercalcemia.

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We report five serial cases of ciliated muconodular papillary tumor (CMPT) of the lung. CMPT is characterized as a low-grade malignant tumor with ciliated columnar epithelial cells combined with goblet cells, typically presenting as peripheral lung tumor and often causing diagnostic or therapeutic problems. In the cases described here, all patients presented with abnormal chest shadow but no definitive symptoms.

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Objectives: This retrospective, multicenter study aimed to determine prognostic factors of completely resected pathologic N2 stage IIIA non-small cell cancer (NSCLC).

Methods: From 25 participating hospitals, 496 patients (325 men and 171 women; median age, 65 years) who underwent complete resection without preoperative treatment for pT1-3 N2 M0, stage IIIA NSCLC between 2000 and 2004 were enrolled. Lobectomy/bilobectomy was performed in 462 patients and pneumonectomy in 34.

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Background: Pneumonectomy is still a high-risk surgical procedure. Postpneumonectomy bronchopleural fistula is an especially severe complication with a high mortality rate. Although several reports have discussed risk factors for early bronchopleural fistula after pneumonectomy, only a few have reported them for late bronchopleural fistula.

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Introduction: Patients with stage II non-small cell lung carcinoma (NSCLC) represent a heterogeneous subgroup with variable 5-year survival rates. The influence of the type of lymph node involvement on survival and recurrence was investigated.

Methods: A total of 128 consecutive patients who underwent complete tumor resection and mediastinal lymph nodes dissection for pT1-2N1M0 NSCLC between July 1991 and December 2003 were retrospectively reviewed.

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Background: The aim of this retrospective study was to assess the prognostic value of serum tumor markers (carcinoembryonic antigen (CEA) and CYFRA21-1) in patients with pathologic (p-) stage I non-small cell lung cancer (NSCLC) undergoing complete resection.

Methods: Two hundred and seventy-five patients (163 males, 112 females, mean age 67.1 years) with p-stage I NSCLC who underwent complete resection at our institution between April 1999 and October 2004 were examined.

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We report a rare case of pulmonary cavernous hemangioma in a 54-year-old man. A computed tomographic scan of the chest showed an ill-defined mass measuring 4 x 3 cm at the angle of the left upper lobe bronchus and the lower lobe bronchus. Surgical resection was performed to obtain a definitive diagnosis.

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Survivin is considered to be associated with tumorigenesis by regulating apoptosis and cell proliferation. Recent experimental studies reported survivin gene expression to be negatively regulated by wild-type p53. We investigated resected tumor specimens from 140 non-small cell lung cancer (NSCLC) patients.

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Purpose: We performed a clinical study on ING1b gene expression and p53 gene status in relation to p53 target genes.

Experimental Design: Eighty-eight tumors from surgically treated non-small cell lung cancer (NSCLC) patients were studied. PCR-single-strand conformational polymorphism after sequencing was performed to investigate ING1 and p53 gene status.

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Background: Topoisomerase IIalpha (Topo IIalpha) is an essential nuclear enzyme for chromosome segregation during mitosis. Previous experimental studies using cell lines reported that Topo IIalpha expression was negatively regulated by wild-type p53 through the gene's promoter region.

Methods: Surgically resected tumor specimens from 98 nonsmall cell lung carcinoma (NSCLC) patients who were not treated with preoperative chemotherapy were studied.

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