Publications by authors named "Shin-Ichi Shimizu"

Article Synopsis
  • Solid-papillary carcinoma (SPC) of the breast is a rare type of cancer, and this study analyzed 44 cases to better understand its cytologic features.
  • The study found that SPC shows distinct characteristics, such as hypercellularity and small nuclei, which are similar to those seen in neuroendocrine tumors (NET) of the breast.
  • Although both SPC and NET share many features, the presence of certain structures like capillary vessels and rosettes is rare and may not be reliable for diagnosis.
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Solid papillary carcinoma of the breast (SPC) is a rare tumor of the breast with the unique histology and frequent neuroendocrine differentiation. However, a real nature and diagnostic importance of the neuroendocrine differentiation have not been properly handled. And relationship between SPC and the other types of invasive breast carcinoma, especially neuroendocrine tumor of the breast (NETb), has not been fully explained.

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Objectives: The Glasgow-Blatchford score (GBS) is a widely used risk assessment tool for patients with upper gastrointestinal bleeding. However, it only identifies a relatively low proportion of patients at low risk for adverse events and poor outcomes. We developed a simple diagnostic algorithm combining the GBS and nasogastric aspirate and evaluated its diagnostic performance.

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We report the case of a 63-year-old man who underwent annual surveillance esophagogastroduodenoscopy, during which a small squamous cell carcinoma and a tiny yellowish granular lesion were found in the middle esophagus, slightly apart from each other. Magnifying endoscopy with narrow-band imaging of the yellowish granular lesion showed yellowish spots and blots scattered within an approximately 2-mm area. The larger spots appeared nodular and were overlaid with tortuous microvessels.

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Citrus mosaic virus (CiMV) is one of the causal viruses of citrus mosaic disease in satsuma mandarins (Citrus unshiu). Prompt detection of trees infected with citrus mosaic disease is important for preventing the spread of this disease. Although rabbit monoclonal antibodies (mAbs) exhibit high specificity and affinity, their applicability is limited by technical difficulties associated with the hybridoma-based technology used for raising these mAbs.

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Ewing's sarcoma usually arises in the bones of children and adolescents. We herein report a 74-year-old man with Ewing's sarcoma in the adrenal gland. The diagnosis was confirmed by a genetic test, pathological studies, and several imaging studies.

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Synovial sarcoma (SS) is a mesenchymal spindle cell tumor which displays variable epithelial differentiation. It commonly arises around the major joints or tendon sheaths in young adults, but is not commonly seen in the stomach. We experienced a case of primary gastric SS.

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Objective: Recently, COL4A1 mutations have been reported in porencephaly and other cerebral vascular diseases, often associated with ocular, renal, and muscular features. In this study, we aimed to clarify the phenotypic spectrum and incidence of COL4A1 mutations.

Methods: We screened for COL4A1 mutations in 61 patients with porencephaly and 10 patients with schizencephaly, which may be similarly caused by disturbed vascular supply leading to cerebral degeneration, but can be distinguished depending on time of insult.

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A 67-year-old man with submaxillary lymphadenopathy diagnosed as reactive follicular hyperplasia of the lymph node was referred to us for pulmonary evaluation. Pathological findings of the lung and hilar lymph node biopsies showed the histological feature of Castleman's disease (CD). Interestingly, infiltrated plasma cells had strong immunoreactivity for IgG4.

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We report a case of sclerosing epithelioid fibrosarcoma focusing on its cytological features in pleural effusion. A 32-year-old man had noticed a tumor in his left buttock 5 years earlier but had not sought treatment because the tumor had been painless. He visited our hospital because the tumor had gradually increased in size.

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The purpose of the present paper was to evaluate the clinicopathological and biological features of 20 Japanese patients with solid-papillary carcinoma of the breast (SPC) or SPC associated with invasive breast cancer. All the patients were Japanese women, including two sisters. The mean age was 66.

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Solid-papillary carcinoma (SPC) of the breast is a rare variant of low-grade intraductal carcinoma but there are few cytological studies. We examined 20 cases of SPC of the breast, aged 31-80 (mean age 66.0 yr), to define the cytological features.

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Background: We compared the Nottingham histological grade (H-grade) and the Japanese nuclear grade (N-grade) to select the better prognostic factor for breast cancers.

Methods: The series included 1786 patients with breast cancers with the exception of non-invasive and stage 4 cancers. They were classified according to the H- and N-grade.

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A 7-year-old girl was hospitalized because of a tumorous mass in her left periorbital region. The tumor was removed by local excision. The soft-part tumor recurred in the parotid gland region 4 months later, and a second recurrence was noted on the left side of the neck 3 years and 3 months thereafter.

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Reported herein is a case of hepatocellular carcinoma (HCC) with unusual peritoneal dissemination masquerading as peritoneal mesothelioma. A 61-year-old man was clinically found to have multiple tumors in his abdominal cavity; peritonitis carcinomatosa was suspected. An autopsy revealed numerous tumors of various sizes in the abdominal serosa, omentum, and diaphragm.

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Purpose: To report a case of the lacrimal gland tumor diagnosed as carcinosarcoma (true mixed tumor) arising from a pleomorphic adenoma.

Design: Interventional case report.

Methods: An 80-year-old Japanese woman was referred with a well-circumscribed tumor in the lacrimal fossa.

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We investigated the prevalence of Helicobacter pylori infection and the effect of its eradication in a series of 61 chronic ITP patients. H. pylori infection was found in 53 (86.

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A case of primary plasma cell leukemia with hairy-cell morphology and lambda-type Bence-Jones protein is reported. Most of the atypical cells in the peripheral blood of this case were small lymphoid cells or lymphoplasmacytoid lymphocytes with numerous cytoplasmic hairy projections. Plasmablastic cells and 'tadpole'-like cells were also present in the bone marrow.

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A 64-year-old man without respiratory symptoms was introduced to our hospital because of a nodule of 20 mm in diameter found in the left lung in a periodic health examination. The chest radiograph and CT scan showed a well-defined nodule in the middle of the left lung field, and enlarged mediastinal lymph nodes. Lung cancer was suspected, and transbronchial and CT guided biopsies were performed, but did not lead to a definitive diagnosis.

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A causal relationship has been suggested between Helicobacter pylori infection and gastric malignancy, including both gastric cancer and low grade lymphoma of mucosa-associated lymphoid tissue (MALToma). We describe a rare case of simultaneous occurrence of low grade MALToma and early cancer of the stomach in a 72-year-old woman. In this patient, low grade MALToma not only had preceded gastric cancer by 5 years, but had also disappeared, and subsequently reappeared coexisting with early cancer of the stomach and Helicobacter pylori infection.

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