Publications by authors named "Chikako Hasegawa"

Adenomatoid tumors (ATs) are rare, benign neoplasms occurring mainly in reproductive organs such as the uterus, ovaries, fallopian tubes, and testes. Uterine adenomatoid tumors (UATs) are generally incidentally diagnosed during histopathological examination of excisional biopsies performed for other indications, most commonly uterine leiomyomas. We herein present a 38-year-old woman who underwent laparoscopic excision of a uterine leiomyoma and a right ovarian teratoma.

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A 73-year-old male metalworker was admitted to our hospital with a 3-year history of progressive dry cough. Chest high-resolution computed tomography revealed emphysematous changes and reticular lesions, which is referred to as combined pulmonary fibrosis and emphysema (CPFE). Surgical lung biopsy specimens revealed unclassified interstitial pneumonia, including a nonspecific interstitial pneumonia pattern and usual interstitial pneumonia pattern.

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Intramedullary spinal cord metastasis is a rare but serious complication which causes rapid progression of neurological deficits. Here we report a 35-year-old man presenting with increasing leg pain and gait disturbance, 8 months after surgery for lung adenocarcinoma. Spinal magnetic resonance imaging revealed an intramedullary tumor at the Th7/8 level.

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The efficacy of polyene macrolides to treat experimental Trichosporon bloodstream infection was evaluated by histopathological examination and viable cell counts in the kidneys of infected mice. Viable cell counts on the 5th day after infection confirmed that liposomal amphotericin B (L-AMB) is a more effective treatment than fluconazole (FLC) for mice infected with an azole-resistant strain of Trichosporon. Histological examination revealed that the administration of L-AMB induced a transformation from acute purulent inflammation caused by both azole-susceptible and -resistant strain infections to a chronic and subsiding form, whereas FLC failed to convert the acute inflammation induced by the azole-resistant strain to a subsiding form.

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Background: Pulmonary adenocarcinomas with a micropapillary component having small papillary tufts and lacking a central fibrovascular core are thought to result in poor prognosis. However, the component consists of tumor cells often floating within alveolar spaces (aerogenous micropapillary component [AMPC]) rather than invading fibrotic stroma observed in other organs like breast (stromal invasive micropapillary component [SMPC]). We previously observed cases of lung adenocarcinoma with predominant SMPC that was associated with micropapillary growth of tumors in fibrotic stroma observed in other organs.

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Generally, adenocarcinomas with micropapillary pattern, featuring small papillary tufts lacking a central fibrovascular core, are thought to have poor prognosis. This pattern has been described in various organs. However, tumor cells with micropapillary pattern of lung adenocarcinoma are more often seen to float within alveolar spaces (aerogenous micropapillary pattern, AMP) than in fibrotic stroma like other organs (stromal micropapillary pattern, SMP) and SMP predominant lung adenocarcinoma (SMPPLA) has not been well described yet.

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We report a case of papillary adenoma of the lung with a peculiar raw macroscopic feature at intraoperative consultation. A 52-year-old man was admitted to our hospital for the evaluation of a solitary peripheral nodule in the left lower lobe which was detected with chest CT. When we took staples off from the stump of the partially resected lung in order to make a frozen section diagnosis, granular fragments leaked out from the stump.

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Background: Maximum standardized uptake value (SUVmax) of 18F-fluorodeoxyglucose positron emission tomography (FDG-PET) has been found to have prognostic value. We previously reported the correlation between SUVmax and pathological invasive area, and determined an SUVmax cut-off value of 2.15 for predicting the recurrence potential of an invasive area of diameter 5mm.

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Background: Postoperative interstitial pneumonitis is a life-threatening complication after lung cancer surgery. We conducted this study to identify risk factors for postoperative interstitial pneumonitis in patients with no clinical evidence of interstitial lung disease.

Methods: We retrospectively studied patients who underwent lung cancer resection.

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Introduction: Squamous cell carcinomas (SqCCs) of the lung can be divided into two types according to the location of primary site; one is central type and another is peripheral type. Many reports on the central type revealed the clinicopathological characteristics relating carcinogenesis, therapeutics and prognosis. On the other hand, those on the peripheral type are very a few and prognostic indicators of peripheral type have not been enough elucidated.

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The fusion gene EML4-ALK (echinoderm microtubule-associated protein-like 4 gene and the anaplastic lymphoma kinase gene) was recently identified as a novel genetic alteration in non-small-cell lung cancer. The clinicopathological features of EML4-ALK-positive adenocarcinoma are reported to include its high incidence in young, non-smoking patients, tumors that show distinct solid or acinar growth patterns with or without signet-ring cell histology, and its mutually exclusive occurrence with mutations in EGFR and KRAS. However, the clinical findings have not been well described.

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Improved histological typing systems for thymic tumors and advances in induction and adjuvant therapy have created the need to reevaluate strategies for the management of thymoma. We retrospectively studied 73 patients with completely resected thymomas unassociated with myasthenia gravis. The World Health Organization (WHO) histologic classification, clinicopathological features and surgical outcomes were analyzed.

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We describe a case of duodenal gangliocytic paraganglioma showing lymph node metastasis. A 61-year-old Japanese man underwent pylorus preserving pancreaticoduodenectomy to remove a tumor at the papilla of Vater. The section of the tumor extending from the mucosa to submucosa of the duodenum was sharply demarcated, solid, and white-yellowish.

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Article Synopsis
  • * Doctors conducted various tests revealing anemia, kidney failure, elevated anti-neutrophil antibodies, and lung issues, leading to a diagnosis of Churg-Strauss syndrome (CSS) with complications like diffuse alveolar hemorrhage (DAH) and rapidly progressive glomerulonephritis (RPGN).
  • * Treatment with intravenous corticosteroids and cyclophosphamide significantly improved his condition, marking a successful intervention for this rare presentation of CSS.
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It has been known that diabetes mellitus impairs functioning of neutrophil, macrophage, cellular immunity, humoral immunity, and iron metabolism. In addition to them, diabetes-related angiopathy leads a patient to being at high-risk individual for several kinds of infectious diseases. Therefore, diabetes has been accepted as one of the important risk factors for invasive fungal infection.

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The aim of the present study is to define the characteristics of the clinical and histopathological features of chronic necrotizing pulmonary aspergillosis (CNPA) cases with severe hemoptysis. We conducted a histological study of three patients clinically diagnosed as having CNPA who had hemoptysis for 5 years. A tuberculosis sequelae was found as the underlying disorder in all three cases.

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A 77-year-old woman received a total abdominal hysterectomy and bilateral salpingo-oophorectomy because of a tumor in the left ovary. The surgical specimen measured 8.5x4.

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Objective: We assessed the clinicopathological features of invasive pulmonary aspergillosis.

Patients And Methods: We conducted chest radiograph-pathologic correlations in 8 cases with invasive pulmonary aspergillosis diagnosed at autopsy.

Results: Subjects were 4 men and 4 women with a mean age of 57.

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Seven of the 17 patients reported that they were satisfied with the palliative care at our outpatient clinic. A patient's will to stay home, a devoted key person to the patient, procedures such as good pain control and an oral intake were considered to be important factors in palliative care at the outpatient clinic. We should understand that the patient's family attending the outpatient clinic is a part of their important daily life, so we try to make them feel comfortable whenever they come to see us.

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Here we report a case that was diagnosed as sarcoidosis but required differential diagnosis from pneumoconiosis. A 51-year-old asymptomatic man, who showed signs of bilateral hilar lymphadenopathy (BHL) on a chest X-ray taken during a medical check, was given a diagnosis of sarcoidosis, based on the results of mediastinoscopic mediastinal lymph node biopsy. Because of the presence of large and small nodular lesions adjacent to the pleura extending from the bilateral upper lobes into the lung field, and continuous bead-like, small nodular lesions in the right interlobar pleura, pleural sarcoidosis was suspected and thoracoscopy was performed.

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This review describes the general histopathological features of cryptococcosis in immunocompetent individuals, as well as in patients with acquired immunodeficiency syndrome (AIDS). Details of the histological examination of cryptococcal lesions are described, with the consideration of morphological modifications induced by treatment with highly active antiretroviral therapy (HAART). The essential histological features of cryptococcosis in individuals with impaired T-cell functioning are yeast-cell proliferation with a histiocytic response, but only minor lymphocytic and neutrophilic components.

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Recent studies have examined cellular kinetics and genetic abnormalities in colorectal polyps with epithelial serrated proliferation (CP-ESP), including hyperplastic polyps, serrated adenomas, and tubulovillous adenomas. However, difficulty in histologically classifying these lesions and the lack of clear-cut diagnostic criteria have led to inconsistent findings. Some 60 cases of CP-ESP and 6 cases of CP-ESP with malignant transformation were studied.

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In this study, we present a case of mild PBC that had anti-p97/VCP. A 53-year-old woman had been suspected of having chronic liver disease since 1983. In 1998, she visited the clinic, complaining of struma and pruritus.

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A description of the pathophysiology of aspergillosis is followed by a review of investigational considerations of animal models. Because a large body of invasive Aspergillus infection occurs as opportunistic infection, there is a large spectrum of the histopathological feature of lesions demonstrated at the site of infection. Histopathology of the lesions can be understood as a phenotypical representation of interaction between lowered defense mechanisms in the host and the virulence of invading fungi.

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Acylated derivatives of capuramycin and A-500359A were synthesized and tested for antimycobacterial activity. Compound 20 having a decanoyl group showed very potent activity.

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