Publications by authors named "Iwao Kumazawa"

Background: Nanoparticle albumin-bound paclitaxel (nab-PTX) is a promising antibody partner for anti-human epidermal growth factor receptor 2 (HER2). We performed neoadjuvant chemotherapy (NAC) for HER2-positive breast cancer (BC) using nab-PTX plus trastuzumab (T-mab) and pertuzumab (P-mab), followed by epirubicin and cyclophosphamide (EC).

Methods: In this multicenter phase II clinical trial (January 2019-July 2020), patients with stage I (T1c)-IIIB HER2-positive primary BC were treated with four cycles of nab-PTX plus T-mab and P-mab, followed by four cycles of EC.

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A 63-year-old man with advanced pancreatic cancer and pyloric obstruction underwent surgical gastrojejunostomy. Malignant biliary obstruction appeared eight months after surgery and was managed with endoscopic ultrasound (EUS)-guided hepaticogastrostomy (HGS). Subsequently, afferent limb obstruction caused by cancer invasion occurred.

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A 77-year-old-woman underwent distal gastrectomy D2 lymph node dissection and cholecystectomy followed by Roux- en-Y reconstruction for Stage ⅢC gastric neuroendocrine cell carcinoma in January 2017. In July of the same year, an abdominal computed tomography scan revealed liver metastasis in segment 4. For treatment of recurrence, SP therapy(S-1 and cisplatin), ramucirumab plus weekly paclitaxel therapy, and nivolumab were administered in that order.

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Introduction: Intestinal malrotation is a congenital anatomical anomaly resulting from abnormal midgut rotation. Many cases occur during childhood and present with intestinal obstruction and midgut volvulus. Intestinal malrotation rarely occurs in adults and is found incidentally because it is asymptomatic.

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Introduction: Edwardsiella tarda is a member of the Enterobacteriaceae family of gram-negative bacilli isolated from animals. Gastroenteritis is the most common manifestation of E. tarda infection.

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Introduction: Solitary adrenal metastasis derived from colorectal cancer is rare. Adrenal metastasis is usually associated with systemic spread of the disease and is considered to be unsuitable for surgical resection. However, it has been reported that an aggressive surgical resection of adrenal metastasis results in improved overall survival in selected patients.

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Background: Recently, the use of taxane-based regimens before anthracycline-based regimens has been shown to achieve high pathological complete response (pCR) rates in patients with breast cancer. Nanoparticle albumin-bound paclitaxel (nab-PTX) has been reported as highly effective and less toxic compared with Cremophor-based Taxol. This phase II clinical trial evaluated the safety and efficacy of preoperative neoadjuvant chemotherapy (NAC) with nab-PTX followed by an epirubicin plus cyclophosphamide (EC)-based regimen for operable breast cancer.

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Introduction: Even now, cystic duct cancer (CDC) as defined by Farrar is rare and has a better prognosis than gallbladder cancer, although CDC as defined by Ozden et al., the definition of which could apply to early and advanced cases of CDC, is not rare and has a poorer prognosis than the CDC defined by Farrar.

Presentation Of Case: A 78-year-old woman with no complaints was found to have a tumor restricted to the cystic duct.

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Pretreatment knowledge of chemosensitivity and side-effects of chemotherapy for colorectal cancer (CRC) patients are likely to ensure the best chemotherapeutic outcome. The aim of this study was to identify additional predictive factors of chemosensitivity to the key CRC treatment drug 5-fluorouracil (5-FU). Surgically obtained specimens from 106 patients treated for CRC were immunohistochemically assessed to investigate the correlation between the protein expression of the 5-FU metabolic enzymes orotate phosphoribosyltransferase (OPRT), thymidylate synthase (TS) and dihydropyrimidine dehydrogenase (DPD), and clinicopathological characteristics as well as the correlation between the protein expression and outcomes of 5-FU-based chemotherapy.

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