Isamu Koyama
Overview
Explore the profile of Isamu Koyama including associated specialties, affiliations and a list of published articles.
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Articles
102
Citations
640
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Recent Articles
1.
Ishida M, Okamoto K, Koyama I, Uchida N, Sato I, Yoshioka A, et al.
Palliat Support Care
. 2025 Mar;
23:e64.
PMID: 40079075
Objectives: Naldemedine is a peripherally acting μ-opioid receptor antagonist used to treat opioid-induced constipation. As this drug does not cross the blood-brain barrier, it is believed that patients without brain...
2.
Ishiyama Y, Hirano Y, Minagawa Y, Yamato M, Akuta S, Nakanishi A, et al.
Surg Case Rep
. 2025 Feb;
11(1).
PMID: 39991492
Introduction: This case report presents the world's first transanal total mesorectal excision (taTME) using the Senhance Digital Laparoscopy System for rectal cancer. Senhance has been gaining attention as an advanced...
3.
Oshima Y, Watanabe Y, Kato T, Takase K, Watanabe Y, Okada K, et al.
Gan To Kagaku Ryoho
. 2025 Feb;
51(13):1724-1727.
PMID: 39948979
In this report, we described a case of an extremely rare primary neuroendocrine tumor of the gallbladder, which corresponds to NET G1 according to the WHO classification. The patient was...
4.
Watanabe Y, Aikawa M, Murase Y, Oshima Y, Kato T, Takase K, et al.
Gan To Kagaku Ryoho
. 2025 Feb;
51(13):1678-1680.
PMID: 39948964
It is unclear whether the remnant stomach can be safely preserved, performing distal pancreatectomy in patients with a prior distal gastrectomy. A 74-year-old man was followed up after robotic distal...
5.
Kawabata J, Kaneko G, Shirotake S, Matsushita S, Homma T, Oyama M, et al.
Cureus
. 2024 Dec;
16(11):e74074.
PMID: 39712776
The Senhance robotic system (Asensus Surgical, Durham, NC, USA) is an innovative platform for minimally invasive surgery. It enables surgeons to perform precise and cost-effective procedures using reusable instruments and...
6.
Kato T, Watanabe Y, Baba Y, Oshima Y, Takase K, Watanabe Y, et al.
Surgery
. 2024 Oct;
178():108845.
PMID: 39384476
Background: Several risk-stratified studies have compared the outcomes of external and internal pancreatic stents in pancreatoduodenectomy (PD), but no resolute standard for a fistula-mitigation strategy exists. The study investigated the...
7.
Kato T, Okada K, Baba Y, Yasuda M, Ohshima Y, Takase K, et al.
Eur J Surg Oncol
. 2024 Oct;
50(12):108691.
PMID: 39366161
Background: Patients with distal cholangiocarcinoma (DCC) frequently receive adjuvant chemotherapy in preoperative and postoperative settings, but prediction of prognostic risk at the time of treatment selection remains challenging. Methods: This...
8.
Utility of a 3 mm Bipolar Instrument in Laparoscopic Renal Surgery Using the Senhance Robotic System
Kaneko G, Shirotake S, Oyama M, Koyama I
Cureus
. 2024 Aug;
16(7):e65694.
PMID: 39211704
We report our initial experience and the utility of 3 mm bipolar forceps in laparoscopic renal surgery using the Senhance robotic system. We performed laparoscopic nephroureterectomy for upper tract urothelial...
9.
Oshima Y, Ishiyama Y, Tanaka H, Fujii T, Okazaki N, Ishii T, et al.
Surg Case Rep
. 2024 Jul;
10(1):166.
PMID: 38955928
Background: Most adult cases of intussusception are caused by colorectal cancer, and emergency surgery is performed when symptoms such as abdominal pain and vomiting are present. The patient must customarily...
10.
Kato T, Watanabe Y, Oshima Y, Takase K, Watanabe Y, Okada K, et al.
Surgery
. 2024 Jun;
176(3):880-889.
PMID: 38879380
Background: An increasing number of patients are achieving long-term survival after pancreatoduodenectomy, meaning that risk assessments of endocrine and exocrine pancreatic insufficiency are needed. Herein, we investigated the risk factors...