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Dive into the research topics where Hiromasa Nakahara is active.

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Featured researches published by Hiromasa Nakahara.


Hepatology Research | 2010

Amino acid imbalance in patients with chronic liver diseases.

Kojiro Michitaka; Atsushi Hiraoka; Misaki Kume; Takahide Uehara; Satoshi Hidaka; Tomoyuki Ninomiya; Aki Hasebe; Yasunao Miyamoto; Misa Ichiryu; Tetsuya Tanihira; Hiromasa Nakahara; Hironori Ochi; Atsushi Tanabe; Kazuhiro Uesugi; Yoshio Tokumoto; Toshie Mashiba; Masanori Abe; Yoichi Hiasa; Bunzo Matsuura; Morikazu Onji

Aim:  The aim of this study is to clarify the amino acid imbalance in patients with chronic hepatitis (CH) as well as those with liver cirrhosis (LC).


Oncology | 2015

Tumor Markers AFP, AFP-L3, and DCP in Hepatocellular Carcinoma Refractory to Transcatheter Arterial Chemoembolization.

Atsushi Hiraoka; Yoshihiro Ishimaru; Hideki Kawasaki; Toshihiko Aibiki; Tomonari Okudaira; Akiko Toshimori; Tomoe Kawamura; Hiroka Yamago; Hiromasa Nakahara; Yoshifumi Suga; Nobuaki Azemoto; Hideki Miyata; Yasunao Miyamoto; Tomoyuki Ninomiya; Masashi Hirooka; Masanori Abe; Bunzo Matsuura; Yoichi Hiasa; Kojiro Michitaka

Background/Aim: We examined tumor marker levels to assess in more detail transcatheter arterial chemoembolization (TACE)-refractory hepatocellular carcinoma (HCC). Materials and Methods: We enrolled patients treated from 2000 to 2011 for HCC beyond the Milan criteria who had good hepatic reserve function (Child-Pugh A) and no portal vein thrombosis or metastases (n = 154). The modified criteria for being TACE-refractory according to the Liver Cancer Study Group of Japan (m-LCSGJ), from which the tumor marker item was excluded, and the Assessment for Retreatment with TACE (ART) score were used for determining whether the HCC was TACE refractory. α-Fetoprotein ≥100 ng/ml, fucosylated α-fetoprotein ≥10%, and des-gamma-carboxy prothrombin ≥100 mAU/ml were used to define whether tumor markers were positive. We added up the number of positive tumor markers as a prognostic score to assess in more detail the evaluation of TACE-refractory HCC. Results: In order to divide the patients into a refractory and nonrefractory group, the m-LCSGJ criteria [mean survival time (MST) 27.1 vs. 49.9 months; p < 0.001] were superior to the ART score (MST 22.0 vs. 35.1 months; p = 0.051). In the refractory group according to the m-LCSGJ criteria, the patients with a low score of positive tumor markers (<2) after 2 sessions of TACE (n = 36) showed a better prognosis than the others (n = 72) (MST 37.7 vs. 23.2 months; p = 0.014). Conclusion: Patients being nonrefractory according to the m-LCSGJ criteria had a better response, and using the number of tumor markers (≥2) is an easy method for predicting the response to TACE and for a more detailed evaluation of TACE-refractory HCC.


European Journal of Radiology | 2015

Prognosis and therapy for ruptured hepatocellular carcinoma: Problems with staging and treatment strategy

Atsushi Hiraoka; Tomoe Kawamura; Toshihiko Aibiki; Tomonari Okudaira; Akiko Toshimori; Hiroka Yamago; Hiromasa Nakahara; Yoshifumi Suga; Nobuaki Azemoto; Hideki Miyata; Yasunao Miyamoto; Tomoyuki Ninomiya; Tadashi Murakami; Yoshihiro Ishimaru; Hideki Kawasaki; Masashi Hirooka; Masanori Abe; Bunzo Matsuura; Yoichi Hiasa; Kojiro Michitaka

BACKGROUND There are no clear criteria established for treating a ruptured hepatocellular carcinoma (HCC). To elucidate the clinical features of affected patients, we examined prognosis and therapy choices. MATERIALS/METHODS We enrolled 67 patients treated for a ruptured HCC (HCV 44, HBV 5, HBV+HCV 1, alcohol 2, others 15; naïve HCC 34, recurrent 33) from 2000 to 2013, and investigated their clinical background and prognosis. RESULTS Median survival time (MST) for all cases was 4 months. For patients who survived for more than 1 year after rupture, the percentages of Child-Pugh C and positive for portal vein tumor thrombosis (PVTT)/extrahepatic metastasis were less than for those who died within 1 year. Child-Pugh classification (A:B:C=14:15:5 vs. 4:9:20, P<0.001) was better, while the percentage of patients with multiple tumors was lower [19/34 (55.9%) vs. 29/33 (87.9%), respectively; P<0.001] in the naïve group. The 1- and 3-year survival rates were better in the naïve as compared to the recurrent group (60.6% and 33.3% vs. 12.6% and 0%, respectively; P<0.01). MST according to modified TNM stage (UICC 7th) calculated after exclusion of T4 factor of rupture, stage I was better than others (22.7 vs. (II) 2.2, (III) 1.2, and (IV) 0.7 months) (P=0.010). CONCLUSION In patients with a ruptured HCC, especially those with a single tumor, and without decompensated liver cirrhosis and PVTT/extrahepatic metastasis, better prognosis can be expected with curative treatment. The present naïve group included more of such cases than the recurrent group, indicating the effectiveness of curative therapy.


Journal of Diabetes | 2016

Ultrasonography screening for hepatocellular carcinoma in Japanese patients with diabetes mellitus

Atsushi Hiraoka; Marie Ochi; Rie Matsuda; Toshihiko Aibiki; Tomonari Okudaira; Tomoe Kawamura; Hiroka Yamago; Hiromasa Nakahara; Yoshifumi Suga; Nobuaki Azemoto; Hideki Miyata; Yasunao Miyamoto; Tomoyuki Ninomiya; Masashi Hirooka; Masanori Abe; Bunzo Matsuura; Yoichi Hiasa; Kojiro Michitaka

Effective surveillance for hepatocellular carcinoma (HCC) in diabetes mellitus (DM) has not been established. We elucidated the risk factors for HCC in DM patients.


Case Reports in Hepatology | 2013

Hepatitis B Virus Reactivation Induced by Infliximab Administration in a Patient with Crohn’s Disease

Yuka Miyake; Aki Hasebe; Tetsuya Tanihira; Akiko Shiraishi; Yusuke Imai; Haruka Tatsukawa; Hiroka Yamago; Hiromasa Nakahara; Yuko Shimizu; Keiko Ninomiya; Atsushi Hiraoka; Hideki Miyata; Tomoyuki Ninomiya; Kojiro Michitaka

A 47-year-old man diagnosed with Crohns disease was treated with infliximab. He tested negative for hepatitis B surface antigen (HBsAg) and hepatitis B surface antibody (anti-HBs) but positive for anti-HB core antibody (anti-HBc). He tested positive for hepatitis B virus (HBV-) DNA 3 months after treatment and was administered entecavir. HBV-DNA test showed negative results 1 month later. ALT was persistently within the normal range, and HBV-DNA was persistently negative thereafter despite the continuation of infliximab every 8 weeks. In our hospital, 14 patients with inflammatory bowel disease, who tested negative for HBsAg, were treated with infliximab; 2 of them tested positive for anti-HBs and/or anti-HBc, and HBV reactivation was observed in 1 patient (the present patient). The present case and these findings highlight that careful follow-up is needed in patients with inflammatory bowel disease treated with infliximab who test positive for anti-HBc and/or anti-HBs.


Internal Medicine | 2016

A Possible Case of Hepatitis due to Hypereosinophilic Syndrome

Tomoe Kawamura; Atsushi Hiraoka; Akiko Toshimori; Hidetaro Ueki; Miho Kaneto; Toshihiko Aibiki; Tomonari Okudaira; Hiroka Yamago; Hiromasa Nakahara; Hideomi Tomida; Yoshifumi Suga; Nobuaki Azemoto; Kenichiro Mori; Hideki Miyata; Tomoyuki Ninomiya; Masashi Hirooka; Masanori Abe; Bunzo Matsuura; Yoichi Hiasa; Katsumi Kito; Kojiro Michitaka

A 63-year-old Japanese man whose white blood cell count and total-bilirubin and aminotransferase levels were elevated was referred to our hospital. Computed tomography did not reveal any abnormalities, and there was no evidence of gastritis or colitis on esophagogastroduodenoscopy. Although the patient had no history of drug use or allergies, a high concentration of eosinophils (80%) was noted. A liver biopsy revealed hepatitis with eosinophilic infiltration. The patients alanine aminotransferase and eosinophil levels improved with the administration of steroids. A second biopsy, performed 6 months later, showed the improvement of the eosinophilic infiltration. The patient was diagnosed with eosinophilic hepatitis due to the presence of hypereosinophilic syndrome without the dysfunction of other organs.


Journal of Gastroenterology | 2015

Muscle atrophy as pre-sarcopenia in Japanese patients with chronic liver disease: computed tomography is useful for evaluation

Atsushi Hiraoka; Toshihiko Aibiki; Tomonari Okudaira; Akiko Toshimori; Tomoe Kawamura; Hiromasa Nakahara; Yoshifumi Suga; Nobuaki Azemoto; Hideki Miyata; Yasunao Miyamoto; Tomoyuki Ninomiya; Masashi Hirooka; Masanori Abe; Bunzo Matsuura; Yoichi Hiasa; Kojiro Michitaka


Internal Medicine | 2009

Primitive Neuroectodermal Tumor of the Pancreas

Hirokazu Doi; Soichi Ichikawa; Atsushi Hiraoka; Misa Ichiryu; Hiromasa Nakahara; Hironori Ochi; Atsushi Tanabe; Akihiro Kodama; Aki Hasebe; Yasunao Miyamoto; Tomoyuki Ninomiya; Norio Horiike; Kazuhito Takamura; Hideki Kawasaki; Chieko Kameoka; Miki Kan; Shigekazu Doi; Yoshiko Soga; Hiromi Tamura; Toshiharu Maeda; Akinori Asaki; Seijin Seno; Haruo Iguchi; Tadashi Hasegawa


Internal Medicine | 2010

Malignant pheochromocytoma with liver metastasis treated by transcatheter arterial chemo-embolization (TACE).

Satoshi Hidaka; Atsushi Hiraoka; Hironori Ochi; Takahide Uehara; Tomoyuki Ninomiya; Yasunao Miyamoto; Aki Hasebe; Tetsuya Tanihira; Atsushi Tanabe; Misa Ichiryu; Hiromasa Nakahara; Nayu Tazuya; Iku Ninomiya; Kojiro Michitaka


Internal Medicine | 2012

Huge pancreatic acinar cell carcinoma with high levels of AFP and fucosylated AFP (AFP-L3).

Atsushi Hiraoka; Hiromasa Nakahara; Hideki Kawasaki; Yuko Shimizu; Satoshi Hidaka; Yusuke Imai; Hiroki Utsunomiya; Haruka Tatsukawa; Nayu Tazuya; Hiroka Yamago; Nobukazu Yorimitsu; Tetsuya Tanihira; Aki Hasebe; Yasunao Miyamoto; Tomoyuki Ninomiya; Masanori Abe; Yoichi Hiasa; Bunzo Matsuura; Morikazu Onji; Kojiro Michitaka

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