Shinsuke Aida

National Defense Medical College, Tokorozawa, Saitama-ken, Japan

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Publications (120)223.94 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Differentiating nonspecific interstitial pneumonia (NSIP) from usual interstitial pneumonia (UIP) is important for the determination of both treatment and prognosis. Using two-dimensional fluorescence difference gel electrophoresis (2D-DIGE), we examined 8 UIPs, 8 NSIPs, and 30 normal lung tissues. Comparisons with control in 2D-DIGE showed that (a) in UIP, nine protein spots were significantly upregulated and seven were significantly downregulated, (b) in NSIP, four protein spots were significantly upregulated and nine were significantly downregulated. The detected proteins were analyzed by MALDI-TOF mass spectrometry, allowing qualitative differences in vimentin subtypes to be characterized. One vimentin subtype was upregulated in UIP, while another one was downregulated in NSIP (vs. control). These different characteristics were partially supported by the results of Western blot analysis. Our immunohistochemistry revealed vimentin expression within fibroblasts (a) in fibroblastic foci in UIP and (b) in fibrotic alveolar walls in NSIP. Differences in vimentin subtypes may provide useful biomarkers for separating NSIP from UIP, alongside differences in histological characteristics.
    Histology and histopathology 09/2013; · 2.24 Impact Factor
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    ABSTRACT: There has been an increase in the detection rate of small early lung cancer due to recent improvements in imaging technology. However, conventional imaging modalities such as computed tomography (CT) alone are not capable of differentiating small pulmonary nodules. New modalities such as F-18 2'-deoxy-2fluoro-D-glucose (FDG) positron emission tomography combined with CT (PET/CT) have contributed to the evaluation of lung cancer staging, although the differential diagnosis of pulmonary nodules showing ground-glass opacity (GGO) with PET/CT is controversial. In Japan, cancer screening with whole body FDG-PET has been available for asymptomatic individuals, and it has been reported that a wide variety of cancer types are detectable by FDG-PET at potentially curable stages. We present the case of a 62-year-old male with early lung cancer, which was revealed by repeated health screening. A PET/CT scan revealed definite intense FDG uptake (SUVmax 1.2) in the pulmonary nodules of the right upper lobe, while no definite FDG uptake was observed in the lesion in the previous annual screening. Right upper lobectomy was performed, and the pathological diagnosis was well-differentiated adenocarcinoma. Five-year survival has been noted since the thoracotomy, and the patient is doing well without recurrence. This is a significant case of early lung cancer with GGO lesions, which revealed intense FDG uptake during an annual repeated health screening with FDG-PET/CT.
    Oncology letters 02/2012; 3(2):297-299. · 0.99 Impact Factor
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    ABSTRACT: A 66-year-old man presented with swelling of the right testis where ultrasonography revealed a heterogeneous mass. The pathological diagnosis after right high inguinal orchiectomy was peripheral T cell lymphoma. Eighteen months later, the patient became aware of left testicular swelling and magnetic resonance imaging indicated recurrence of lymphoma. The pathology diagnosis after left high inguinal orchiectomy was plasmacytoma. Reevaluating the pathology of the previously resected right testicular tumor, we decided on the basis of positive immunostaining for CD38 and CD138 that the tumor in the right testis was also a plasmacytoma. Radiation therapy was applied to the left scrotum and the left inguinal area because plasmacytoma cells had invaded the spermatic cord. Multiple bone metastases and upper pharyngeal metastasis developed 5 months after the left orchiectomy, and in spite of multiple courses of combination chemotherapy the patient died of disseminated disease.
    Hinyokika kiyo. Acta urologica Japonica 11/2011; 57(11):653-6.
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    ABSTRACT: This study was designed to clarify retrospectively the clinical significance of occult metastases in both sentinel lymph nodes (SLNs) and non-SLNs in patients with early breast cancer. A total of 109 (80.1%) of 136 women with breast cancer who had consecutively undergone SLN biopsy (176 lymph nodes) were intraoperatively diagnosed as being free of SLN involvement. SLNs were routinely examined by hematoxylin-eosin (HE) staining of one to four frozen sections per node. Sixty-four (58.7%) of these patients also underwent backup axillary dissection. For the 109 patients, all formalin-fixed, paraffin-embedded tissues of SLNs and non-SLNs were entirely cut into 5-μm-thick sections. All serial step sections at 85-μm intervals were stained with HE and immunohistochemistry with pancytokeratin. Occult metastases in SLNs and non-SLNs were detected in 25 (23%) and 10 (16%) patients, respectively. The presence of occult SLN metastasis was marginally correlated with T-factor (P=0.06), and predictive factors for occult non-SLN metastases were tumor nuclear grade (P=0.039). With a median follow-up of 86 months, disease-free survival (P=0.3) or overall survival (P=0.8) did not differ between the patients with and without occult SLN metastases, regardless of backup axillary lymph node dissection. SLN or non-SLN occult metastases detected by serial step sections at 85-μm intervals did not have significant prognostic implications.
    Annals of Surgical Oncology 10/2011; 19(4):1160-6. · 3.94 Impact Factor
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    ABSTRACT: To assess whether early lung cancer prediction might be informed by an mRNA assay for 5-fluorouracil pathway genes in peripheral blood mononuclear cells (PBMNCs), we examined specimens taken from 51 adenocarcinoma patients and 38 controls (including six patients with benign tumors). PBMNCs and tumor-tissue specimens were taken for measurement of the mRNAs of various 5-fluorouracil pathway genes [thymidylate synthase (TS), dihydropyrimidine dehydrogenase (DPD), thymidine phosphorylase (TP), and orotate phosphoribosyl transferase (OPRT)]. By quantitative RT-PCR, all four mRNAs were detected in both PBMNCs and tumor tissues. In PBMNCs, TS mRNA/GAPDH mRNA levels were significantly higher in adenocarcinoma patients than in the controls, and significantly higher for pathological stages 2-4 and lymph-node involvement pN1-pN3 than for pathological stage 1 and pN0, respectively. No correlation between PBMNCs and tumor-tissue specimens was found for the level of any mRNA. Thus, the measurement of TS mRNA in PBMNCs might aid the diagnosis of lung adenocarcinoma.
    Lung cancer (Amsterdam, Netherlands) 02/2011; 71(2):199-204. · 3.14 Impact Factor
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    ABSTRACT: Gangliocytic paraganglioma (GP) is generally considered to be a benign periampullary lesion, although it is unclear whether it should be classified as a hamartoma or as a neoplasm. Here, we present a GP case with lymph node metastasis. A 16-year-old boy complained of exertional dyspnea. Upper endoscopy and imaging studies revealed a polypoid ampullary tumor. Pancreaticoduodenectomy with lymph node dissection was performed due to swelling of peripancreatic lymph nodes. Histologically, the tumor consisted of three cell types: epithelioid; spindle; and ganglion cells. In addition to these typical components of GP, a distinct glandular component was also present. There was substantial invasion of tumor cells into the lymphovascular vessels, associated with lymph node metastases. These lymph node metastases were histologically similar to the primary tumor. To judge from these findings GP may be a true neoplasm with metastatic capacity. Pre- and intraoperative investigations for lymph node or distant metastases are required for adequate resection of this kind of tumor.
    Pathology International 02/2011; 61(2):104-7. · 1.59 Impact Factor
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    ABSTRACT: To examine glucose-regulated protein 78 (GRP78; a major molecular chaperone at the endoplasmic reticulum, strongly expressed in several tumours) expression in urothelial carcinoma (UC) of the upper urinary tract (UUT) and to evaluate the diagnostic and progressive importance of GRP78 expression in UC-UUT. We investigated GRP78 expression (using immunohistochemistry) in 126 UC-UUTs to assess its relevance to progression. GRP78 overexpression was recognised in 23 (18.3%) of tumour samples. There was no association between GRP78 overexpression and clinicopathological findings, except for an association with low grade in invasive tumours. GRP78 overexpression significantly improved the disease-free survival rate in all patients (according to univariate and multivariate analyses), but did not alter the overall survival rate. The detection of GRP78 overexpression would appear to provide valuable information for the prognosis of UC-UUT.
    BJU International 09/2010; 106(6):873-8. · 3.13 Impact Factor
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    ABSTRACT: We report a case of massive intra-abdominal undifferentiated carcinoma derived from a tiny well-differentiated endometrioid adenocarcinoma of the ovary. The patient, a 56-year-old woman, who presented with a large intra-abdominal mass, underwent cytoreductive surgery with hysterectomy and bilateral salpingo-oophorectomy. Macroscopically, the intra-abdominal mass was composed of fragile and solid tumor components with extensive necro-hemorrhagic areas, mimicking a primary peritoneal tumor. Both ovaries were apparently normal in size, but a cut section of the right ovary revealed a 2-cm solid and cystic tumor showing focal rupture to the peritoneal surface. The intra-abdominal tumor consisted of pleomorphic cells without specific differentiation, showing diffuse sheet-like proliferation. The right ovarian tumor was a histologically well-differentiated endometrioid adenocarcinoma. Both the intra-abdominal undifferentiated tumor and the ovarian adenocarcinoma cells were immunohistochemically positive for keratin AE1/3, Ber-EP4, and CD10. Epithelial membrane antigen was positive only in the ovarian adenocarcinoma component, and vimentin was diffusely positive only in the intra-abdominal undifferentiated tumor component. Calretinin was negative in both tumor components. Allelotype analysis using 24 polymorphic markers located on 12 chromosomal arms showed that the intra-abdominal undifferentiated carcinoma and ovarian adenocarcinoma components had a high concordance rate (88%) of allelic patterns including identical allelic loss patterns at 7 chromosomal loci, suggesting a common genetic lineage. These data suggest that ovarian endometrioid adenocarcinoma, even when small in size, can give rise to a massive undifferentiated carcinoma filling the peritoneal cavity.
    International journal of gynecological pathology: official journal of the International Society of Gynecological Pathologists 07/2010; 29(4):321-7. · 2.07 Impact Factor
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    ABSTRACT: A 69-year-old woman who had been treated with hemodialysis for 16 months for chronic renal failure presented with a chief complaint of gross hematuria in March 2007. Cystoscopic examination revealed a non-papillary, pedunculated tumor located in the right wall of the urinary bladder. A transurethral resection of the bladder tumor (TURBT) was performed in September 2007. The pathological diagnosis was urothelial carcinoma clear cell variant. The patient is now apparently free of disease 20 months after TURBT. Urothelial carcinoma clear cell variant of the urinary bladder is a rare primary tumor, and this is the fourth case of urothelial carcinoma clear cell variant of the bladder to be reported.
    Hinyokika kiyo. Acta urologica Japonica 03/2010; 56(3):163-5.
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    ABSTRACT: Reported herein is a case of malignant pleural mesothelioma, initially diagnosed on cervical lymph node biopsy. A 58-year-old man, without obvious evidence of asbestos exposure, exhibited repeated pleural effusion (cause unclear), which was resolved by diuretics. A neck mass was apparent and was identified pathologically as a lymph node metastasis of malignant mesothelioma. F-18 fluorodeoxyglucose positron emission tomography/CT established the diagnosis of malignant pleural mesothelioma. Two conclusions emerge from this report: (i) cervical lymph node metastasis of pleural mesothelioma, although rare, should be included in differential diagnosis; and (ii) positron emission tomography/CT is useful for establishing a diagnosis of mesothelioma.
    Pathology International 09/2009; 59(8):592-4. · 1.59 Impact Factor
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    ABSTRACT: We report a tracheobronchial pulmonary manifestation caused by pyoderma gangrenosum, a neutrophilic dermatosis of unknown etiology. A 54-year-old man presented with pulmonary infiltrates followed by multiple painful cutaneous pustules on the scrotum. Skin biopsy showed pronounced neutrophilic infiltration without microorganism or granuloma, consistent with pyoderma gangrenosum. Bronchoscopy revealed multiple scattered polypoid nodules with a yellowish irregular surface from the trachea to bilateral bronchi; the appearance closely mimicked that of a skin lesion. Endobronchial biopsy demonstrated inflamed granulation and necrosis with infiltration by numerous neutrophils without vasculitis or granulomas, interpreted as pyoderma gangrenosum of the bronchi. Although the etiology of pyoderma gangrenosum is poorly understood, this case suggests that a common pathogenesis may account for the simultaneous cutaneous and airway inflammation.
    Mayo Clinic Proceedings 07/2009; 84(6):555-7. · 5.79 Impact Factor
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    ABSTRACT: System l-amino acid transport mediates the uptake of aromatic neutral amino acids and nutritionally essential amino acids from extracellular fluids. Little is known about the role of l-amino acid transporter 1 (LAT1), a member of the system l-amino acid transporter family, in non-small-cell lung carcinomas (NSCLCs). We examined (i) LAT1 mRNA levels in 40 normal lung tissues (NLTs) and 237 NSCLCs using semiquantitative RT-PCR, (ii) LAT1 protein expression in 295 NSCLCs using immunohistochemistry, and (iii) whether LAT1 mRNA and protein expressions were related to clinicopathologic findings and outcome. The LAT1 mRNA level was significantly higher in all NSCLCs (6.81+/-1.13) than in NLT (1.00+/-0.18). The LAT1 mRNA level showed no association with clinicopathologic findings or outcome. LAT1 protein was detected with a diffuse or granular appearance within the cytoplasm and/or on the plasma membrane of tumor cells. When tumors were graded as positive if staining indicating a plasma membrane expression of LAT1 protein made up more than 10% of the tumor, the frequency of this membrane expression was found to be associated with tumor histology, differentiation grade, pathologic stage, T classification, pleural invasion, lymph-vessel invasion, and overall survival rate. Detection of a plasma membrane expression of LAT1 protein would appear to be of value in informing the prognosis in NSCLC cases.
    Lung cancer (Amsterdam, Netherlands) 07/2009; 68(1):58-65. · 3.14 Impact Factor
  • Hideo Kobayashi, Yuichi Ozeki, Shinsuke Aida
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    ABSTRACT: Pulmonary and thymic lymphoid hyperplasia with characteristic clinicoradiological manifestations were seen in a 71-year-old woman who was diagnosed with primary Sjögren's syndrome. A hazy opacity 12 mm in diameter and an anterior mediastinal nodule 20 mm in diameter were incidentally detected on computed tomography. Thoracoscopic biopsy revealed lymphoid hyperplasia in the lung accompanying thymic lymphoid hyperplasia. Immunohistochemically, the pulmonary lesion was considered to be nodular lymphoid hyperplasia (NLH), not lymphoma. A previously undescribed finding in the NLH was the hazy opacity containing an air bronchiologram, not a solid nodule. This finding might suggest a common causal relation for NLH, thymic hyperplasia, and primary Sjögren's syndrome.
    Japanese journal of radiology 03/2009; 27(2):107-10. · 0.74 Impact Factor
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    ABSTRACT: The most common neoplasms of the peritoneum are malignant mesothelioma and serous papillary adenocarcinoma. Clear cell carcinoma (CCC) is mostly derived from the ovary and often associated with endometriosis. We describe the clinicopathologic features of two cases diagnosed as CCC of the peritoneum origin. Case 1, a 53-year-old woman, presented with upper abdominal and pelvic tumors. Case 2, a 66-year-old woman, presented with massive ascites and abdominal tumor. The ovaries and uterine endometrium of these cases were not affected, and the tumors were diagnosed as Stage IIIc CCC of the peritoneum origin. Pathologically, endometriosis was not observed in either case. Adjuvant chemotherapy using irinotecan and cisplatin was effective in one case. The cases and a review of the literature suggested that residual tumor volume size determines the survival of these patients, and that the tumors show resistance to conventional platinum-based chemotherapy.
    European journal of gynaecological oncology 01/2009; 30(5):575-8. · 0.60 Impact Factor
  • The Journal of the Japanese Associtation for Chest Surgery 01/2009; 23(5):748-751.
  • Haigan 01/2009; 49(1):25-29.
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    ABSTRACT: We report 3 cases of solitary papillomas located in peripheral regions of the lung that are extremely rare in the literature. The patients were 75-year-old and 72-year-old men and a 53-year-old woman. One patient complained of recurrent hemoptysis. The other 2 had no symptoms, but abnormal nodular shadows were revealed by chest radiographs during a health check. The maximum diameters of the tumors were 1.0, 1.4, and 1.1 cm, respectively. The 3 tumors gave almost the same histologic findings. Papillomatous fronds lined by a stratified columnar epithelium were seen in the lumens of peripheral bronchi, bronchioles, or alveoli. The stratified columnar epithelium consisted of ciliated, mucous, and basal cells. The neoplastic epithelium extended to the alveolar region and showed a similar appearance to bronchioloalveolar or papillary type adenocarcinomas. For differential diagnosis, it is noteworthy that endobronchiolar papillomatous fronds constantly exist and spreading along alveolar walls is limited in adjacent alveoli in peripheral papillomas. The presence of ciliated cells and basal cells is considered an important finding to suggest benign character of the lesion.
    The American journal of surgical pathology 09/2008; 32(10):1489-94. · 4.59 Impact Factor
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    ABSTRACT: The contacts between epithelial cells are maintained mainly by adherens junctions and tight junctions (TJs). However, the role of TJ proteins in cancer is not well understood. We studied the expression of occludin and 4 claudins to assess their importance in the progression of urothelial carcinoma of the upper urinary tract (UC-UUT). In 129 cases, we examined their expression using immunohistochemical analysis and also their relationships to clinicopathologic parameters and clinical outcome. Positive expression of occludin and claudins 1, 3, 4, and 7 were recognized in 117 (90.7%), 113 (87.6%), 95 (73.6%), 127 (98.4%), and 123 (95.3%) of tumor samples, respectively. Claudin-3 expression was significantly associated with stage, grade, and pattern of growth. Claudins 1 and 4 expression was significantly associated with stage. However, neither occludin nor claudin-7 expression was associated with clinicopathologic findings. When tumors with scores below the median for a given protein were classified as the "low expression group," univariate analysis of overall survival revealed that claudins 1 and 3 had a significant effect on overall survival. Detection of claudins 1, 3, and 4 would seem to provide valuable information about the progression of UC-UUT.
    American Journal of Clinical Pathology 08/2008; 130(1):43-9. · 3.01 Impact Factor
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    ABSTRACT: A 60-year-old man with a 7-year history of multiple pulmonary nodules presented to our hospital because the nodules were seen to have increased in size on review of films on a regular medical checkup 1 week earlier. Computed tomography (CT) revealed multiple pulmonary nodules with calcification in the lungs. The largest nodule measuring 2.5 cm in the maximum dimension was lobulated and ill-defined. The patient underwent 18F-fluorodeoxyglucose positron emission tomography/CT (18F-FDG-PET/CT) to evaluate the multiple nodules and to search for a primary lesion. 18F-FDG-PET/CT revealed increased uptake in only two nodules with a standardized uptake value of 4.61 and 2.10, respectively. The two foci with increased 18F-FDG uptake were resected and pathologically proven to be pulmonary epithelioid hemangioendothelioma (PEH). PEH can transform into malignancy with metastasis. An 18F-FDG-PET/CT finding may be an indicator to decide on PEH resection.
    Annals of Nuclear Medicine 08/2008; 22(6):521-4. · 1.51 Impact Factor
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    ABSTRACT: A radiation-induced cerebellar glioma is extremely rare, and the etiology of such a tumor is unknown. We report a rare case of hemorrhagic cerebellar anaplastic glioma occurring 12 years after prophylactic cranial radiotherapy for acute lymphocytic leukemia. We discuss the etiologies of the radiation-induced hemorrhagic cerebellar glioma as a secondary malignancy after radiotherapy.
    Neurologia medico-chirurgica 04/2008; 48(3):126-30. · 0.65 Impact Factor

Publication Stats

1k Citations
223.94 Total Impact Points


  • 1991–2013
    • National Defense Medical College
      • • Department of Laboratory Medicine
      • • Division of Medicine
      • • Division of Pathology
      • • Department of Internal Medicine
      • • Department of Neurosurgery
      • • Division of Clinical Pathology
      • • Department of Surgery
      Tokorozawa, Saitama-ken, Japan
  • 2001–2004
    • Tokorozawa Central Hospital
      Tokorozawa, Saitama, Japan