Monno, Masayoshi

写真a

Affiliation

School of Medicine, Department of Surgery (General and Gastroenterological Surgery) ( Shinanomachi )

Position

Instructor
Scopus Paper Info  
Paper Count: 7 Citation Count: 27 h-index: 2

Click to view the Scopus page. The data was downloaded from Scopus API in September 06, 2026, via http://api.elsevier.com and http://www.scopus.com .

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Papers 【 Display / hide 】

  • Spread Through Air Spaces in Colorectal Lung Metastases Signals Local Recurrenece and Reflects Morphologic Aggressiveness of the Primary Tumor

    Nakai T., Morita S., Kurebayashi Y., Monno M., Seishima R., Shigeta K., Okabayashi K., Mino-Kenudson M., Kitagawa Y., Asakura K.

    Pathology International 76 ( 3 )  2026.03

    ISSN  13205463

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    Tumor spread through air spaces (STAS) is a histological feature associated with poor prognosis in primary lung cancer, but its relevance in colorectal cancer (CRC) pulmonary metastases remains unclear. This study evaluated the prognostic impact of STAS in CRC pulmonary metastases and its association with histologic features of the primary tumor. A total of 124 patients who underwent pulmonary resection for CRC metastases were retrospectively analyzed. Quantitative STAS parameters, including density and maximum spread distance, were assessed histologically. Survival outcomes were analyzed using Kaplan–Meier and Cox proportional hazards models, and logistic regression identified predictors of STAS. STAS was present in 33.1% of patients and was associated with significantly shorter 5-year recurrence-free survival (18.7% vs. 53.0%, p = 0.002) and overall survival (p = 0.001). Quantitative STAS metrics correlated with intrathoracic recurrence. Patients with high tumor budding grade had a significantly higher STAS-positive rate than those with none or low grade (60% vs. 31.2%, p = 0.036). Tumor budding independently predicted STAS (odds ratio: 3.19, 95% confidence interval: 1.05–9.69, p = 0.040). STAS independently predicted poor prognosis, particularly intrathoracic recurrence. Quantitative STAS assessment enhanced prognostic precision, and tumor budding grade may serve as a preoperative marker for predicting STAS.

  • Impact of Renin-Angiotensin System Inhibitors on Renal Function During Temporary Ileostomy Period in Rectal Cancer Patients: A Retrospective Cohort Study

    Shogen Y., Seishima R., Monno M., Morita S., Shigeta K., Okabayashi K., Kitagawa Y.

    Annals of Gastroenterological Surgery 10 ( 2 ) 527 - 533 2026.03

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    Background: This study aims to elucidate the effects of renin-angiotensin system inhibitors (RASIs) on renal function throughout the stoma period in patients undergoing ileostomy formation and subsequent stoma closure following rectal cancer surgery. Methods: In this single-center retrospective study, patients who underwent rectal resection with temporary ileostomy between January 2010 and December 2020 were divided into two groups based on RASI use. Renal function was assessed using the estimated glomerular filtration rate (eGFR) at pre-surgery (T0), a month post-surgery (T1), and pre-stoma closure (T2). The eGFR, its change at each point, and the chronic kidney disease (CKD) classification were used to assess early and subsequent changes in renal function. Results: Nineteen of 101 patients were using RASI. The RASI and control groups both exhibited eGFR decline at T1, with the former group showing a significantly lower median eGFR (56.2 mL/min/1.73m<sup>2</sup> vs. 68.7; p = 0.007). Although a slight improvement in eGFR was observed, neither group returned to baseline levels by T2. The RASI group showed lower eGFR values at both time points. Multivariate analyses indicated that RASI use was a significant risk factor for renal function impairment in terms of a worse CKD classification at T1 (OR: 9.099; 95% CI: 3.015–27.460; p < 0.001). Conclusion: Our findings suggest that the use of RASIs is associated with early perioperative renal function impairment in patients undergoing ileostomy and stoma closure, with relatively slow recovery. These results indicate the impact of RASIs on eGFR and the importance of careful renal function management.

  • Comparison of Short-Term Outcomes of Intracorporeal Anastomosis in Robot-Assisted colon Resection and Laparoscopic colon Resection: A Single-Center Study and Systematic Review and meta-Analysis

    Tomita Y., Shigeta K., Momose Y., Monno M., Morita S., Okabayashi K., Kitagawa Y.

    Asian Journal of Endoscopic Surgery 19 ( 1 )  2026.01

    ISSN  17585902

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    Background: This study evaluates short-term outcomes of robot-assisted (Rt) and laparoscopic (Lap) intracorporeal anastomosis (IA) in colon resection using an exploratory single-center retrospective cohort and a systematic review and meta-analysis conducted in accordance with PRISMA guidelines. Methods: Patients with colon cancer who underwent laparoscopic or robotic surgery at our institution from 2015 to 2024 were retrospectively enrolled. Additionally, a meta-analysis was conducted using PubMed, Web of Science, Scopus, and the Cochrane Library to identify studies comparing Rt-IA and Lap-IA. Short-term outcomes were statistically compared between the two groups. Results: A total of 77 patients were included (Rt-IA 26, Lap-IA 51). Intraoperative blood loss was significantly lower in the Rt-IA group (median, 5 mL vs. 10 mL; p = 0.001). No statistically significant differences were detected in major postoperative complications or most recovery-related outcomes. For the meta-analysis, 11 studies (1 prospective and 10 retrospective) met the inclusion criteria. After adding our institutional data, the pooled analysis showed that operative time was significantly longer in the Rt-IA group (MD, 54.02 min; 95% CI, 34.18–73.86; I<sup>2</sup> = 95.4%), whereas the Rt-IA group demonstrated significantly less blood loss (MD, −14.33 mL; 95% CI: −27.04 to −1.63; I<sup>2</sup> = 19.3%). Conclusions: The results of our institutional analysis together with meta-analysis suggest that Rt-IA may be associated with longer operative time but slightly lower blood loss than Lap-IA. These findings suggest that Rt-IA may be a feasible alternative to Lap-IA; however, the results should be interpreted with caution given the limitations of the available evidence.

  • A Case of IgG4-Related Disease with Duodenitis That Was Difficult to Diagnose Preoperatively

    Okada J., Suzuki K., Monno M., Omagari K., Hashimoto T., Nishikawa M.

    Japanese Journal of Gastroenterological Surgery 59 ( 5 ) 263 - 271 2026

    ISSN  03869768

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    A 48-year-old woman presented with recurrent epigastric pain without significant medical or family history. Upper endoscopy revealed edematous mucosal changes in the descending duodenum, although the major papilla appeared normal. Duodenal biopsies showed only mild inflammatory infiltrates without an increase in IgG4-positive plasma cells. Contrast-enhanced CT showed enlargement of the pancreatic head with cystic changes and increased peripancreatic fat density, suggesting an inflammatory process. Endoscopic ultrasonography-guided fine-needle aspiration of the pancreatic head lesion revealed only mild fibrosis without IgG4-positive plasma cells, and the serum IgG4 level was in the normal range. Under a presumed diagnosis of treatment-refractory chronic pancreatitis, subtotal stomach-preserving pancreaticoduodenectomy was performed. Histopathological examination indicated moderate to marked inflammation in the duodenal submucosa and deeper layers, characterized by storiform fibrosis and abundant IgG4-positive plasma cell infiltration. In contrast, the pancreatic parenchyma showed no significant inflammatory changes. These findings supported a diagnosis of IgG4-related disease predominantly involving the duodenum. IgG4-related lesions of the small intestine, particularly those localized to the duodenum, are rare and often present with non-specific clinical, endoscopic, and imaging features, making preoperative diagnosis challenging. This case highlights an unusual manifestation of IgG4-related disease and shows the importance of considering this entity in cases of unexplained duodenal inflammation, as well as the essential role of histopathological evaluation in establishing a definitive diagnosis.

  • POFUT1 and PLAGL2 are characteristic markers of mucinous colorectal cancer associated with MUC2 expression

    Monno M., Ogiri M., Seishima R., Suzuki Y., Hattori K., Matsui S., Shigeta K., Okabayashi K., Kitagawa Y.

    Cell Biochemistry and Function 42 ( 2 )  2024.03

    ISSN  02636484

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    Colorectal mucinous adenocarcinoma (MAC) is one of the most lethal histological types of colorectal cancer, and its mechanism of development is not well understood. In this study, we aimed to clarify the molecular characteristics of MAC via in silico analysis using The Cancer Genome Atlas database. The expression of genes on chromosome 20q (Chr20q) was negatively associated with the expression of MUC2, which is a key molecule that can be used to distinguish between MAC and nonmucinous adenocarcinoma (NMAC). This was consistent with a significant difference in copy number alteration of Chr20q between the two histological types. We further identified 475 differentially expressed genes (DEGs) between MAC and NMAC, and some of the Chr20q genes among the DEGs are considered to be pivotal genes used to define MAC. Both in vitro and in vivo analysis showed that simultaneous knockdown of POFUT1 and PLAGL2, both of which are located on Chr20q, promoted MUC2 expression. Moreover, these genes were highly expressed in NMAC but not in MAC according to the results of immunohistological studies using human samples. In conclusion, POFUT1 and PLAGL2 are considered to be important for defining MAC, and these genes are associated with MUC2 expression.

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

  • 大腸癌肝転移における癌関連線維芽細胞出現メカニズムの解明

    2019.04
    -
    2021.03

    MEXT,JSPS, Grant-in-Aid for Scientific Research, Grant-in-Aid for Early-Career Scientists , Principal investigator

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