Laser speckle flowgraphy has comparable accuracy to indocyanine green fluorescence angiography in assessing bowel blood perfusion.

PURPOSE: To investigate the accuracy of laser speckle flowgraphy (LSFG), a noninvasive method for the quantitative evaluation of blood flow using mean blur rate (MBR) as a blood flow parameter in the assessment of bowel blood perfusion compared to indocyanine green fluorescence angiography (ICG-FA). METHODS: We enrolled 46 patients who underwent left-sided colorectal surgery. LSFG and ICG-FA were applied to assess blood bowel perfusion, with MBR and luminance as parameters, respectively. In both measurement methods, the position where the parameter suddenly decreased was defined as the blood flow boundary line. Subsequently, the blood flow boundaries created after processing the blood vessels flowing into the intestinal tract were determined using LSFG and ICG-FA, and concordance between the two was examined. Blood flow boundaries were visually identified using color tone changes on a color map created based on MBR in LSFG and using differences in luminance in ICG-FA. The distances between the transection line and blood flow boundaries determined using each method were compared. RESULTS: The location of blood flow boundaries matched in 65% (30/46) of cases. Although locations differed in the remaining 35% (16/46), all were located on the anal side near the transection line, and the difference was not clinically significant. The average distances between the transection line and blood flow boundary were 2.76 (SD = 3.25) and 3.71 (SD = 4.26) mm, respectively. There was no statistically significant difference between the two groups (p = 0.38). CONCLUSION: LSFG was shown to have comparable accuracy to ICG-FA, and may be useful for evaluating bowel perfusion.

Prognostic and diagnostic effects of high serum midkine levels in patients with hepatocellular carcinoma.

Midkine (MK) is a soluble cytokine, and its serum levels strongly correspond to protein expression levels in tumors. The present study aimed to clarify the clinicopathological and prognostic significance of serum MK (s-MK) in patients with hepatocellular carcinoma (HCC). Serum samples were obtained before surgery from 123 patients with HCC who had undergone surgery between January 2012 and December 2020. The receiver operating characteristic curve revealed that the best cut-off value for s-MK in differentiating HCC from healthy cases was 426 pg/ml. The clinicopathological variables and overall survival of patients were compared between the s-MK-positive group and s-MK-negative group. The sensitivity, specificity and accuracy of s-MK were 82.1, 97.4 and 88.0%, respectively. An s-MK-positive status was significantly associated with the number of tumors (≥2). The positivity rate of s-MK was significantly higher compared with that of α-fetoprotein and protein-induced by vitamin K absence-II. In total, only 28% of the patients were positive for s-MK. The s-MK-positive group showed significantly worse overall survival compared with the s-MK-negative group. Moreover, multivariate analysis revealed that an s-MK-positive status was independently associated with poor prognosis. s-MK was useful in detecting early HCC. The findings of this study indicated that the s-MK-positive status is associated with the number of tumors and can act as an independent prognostic risk factor.

Safety of laparoscopic liver resection for high-risk patients.

BACKGROUND/PURPOSE: To investigate the safety of laparoscopic liver resections (LLRs) for high-risk patients (HRs) with preoperative comorbidities affecting the heart, lungs, kidneys, glucose tolerance, and central nervous system. METHODS: This retrospective study included 585 patients who had undergone total hepatectomies from 2006 to 2020. Among them, 239 patients underwent LLRs, and 349 underwent open liver resections (OLRs). The safety and validity of LLRs were analyzed by comparing outcomes and preoperative records between HRs and nonhigh-risk patients (nHRs). HRs were defined as patients with any type of chronic heart disease rated New York Heart Association II or higher, chronic obstructive pulmonary disease rated stage III or higher, chronic kidney disease rated stage III or higher, insulin-dependent diabetes mellitus, or cerebrovascular disease with neurological sequelae. RESULTS: A total of 117 LLRs (49.0%) were performed in HRs, and there were more patients with ASA class III or higher than nHRs. Complications of Clavien-Dindo classification grade 3b or higher were not observed in HRs and in only one nHR. Furthermore, no postoperative exacerbations of the five HRs factors were observed in either group. CONCLUSIONS: Rigorous assessment of surgical indications and perioperative management can promote safe LLRs, even in HRs with comorbidities.

A proposed new Japanese classification of synchronous peritoneal metastases from colorectal cancer: A multi-institutional, prospective, observational study conducted by the Japanese Society for Cancer of the Colon and Rectum.

Aim: To establish a new Japanese classification of synchronous peritoneal metastases from colorectal cancer. Methods: This multi-institutional, prospective, observational study enrolled patients who underwent surgery for colorectal cancer with synchronous peritoneal metastases. Overall survival rates were compared according to the various models using objective indicators. Each model was evaluated by Akaike's information criterion (AIC). The region of peritoneal metastases was evaluated by the peritoneal cancer index (PCI). Results: Between October 2012 and December 2016, 150 patients were enrolled. The AIC of the present Japanese classification was 1020.7. P1 metastasis was defined as confined to two regions. The minimum AIC was obtained with the cutoff number of 10 or less for P2 metastasis and 11 or more for P3 metastasis. As for size, the best discrimination ability between P2 and P3 metastasis was obtained with a cutoff value of 3 cm. The AIC of the proposed classification was 1014.7. The classification was as follows: P0, no peritoneal metastases; P1, metastases localized to adjacent peritoneum (within two regions of PCI); P2, metastases to distant peritoneum, number ≤10 and size ≤3 cm; P3, metastases to distant peritoneum, number ≥11 or size >3 cm; P3a, metastases to distant peritoneum, number ≥11 and size ≤3 cm, or number ≤10 and size >3 cm; P3b, metastases to distant peritoneum, number ≥11 and size >3 cm. Conclusion: This objective classification could improve the ability to discriminate prognosis in patients with synchronous peritoneal metastases from colorectal cancer.

The Outcome of Conversion to Hand-Assisted Laparoscopic Surgery in Laparoscopic Liver Resection.

BACKGROUND: Hand-assisted laparoscopic surgery (HALS) is known as a useful option. However, the outcome and predictor of conversion to HALS in laparoscopic liver resection (LLR) are unclear. METHODS: Data from consecutive patients who planned pure LLR between 2011 and 2020 were retrospectively reviewed. Univariate and multivariate analyses were performed and compared pure LLR, HALS, and converted open liver resection (OLR). RESULTS: Among the 169 LLRs, conversion to HALS was performed in 19 (11.2%) and conversion to OLR in 16 (9.5%). The most frequent reasons for conversion to HALS were failure to progress (11 cases). Subsequently, bleeding (3 cases), severe adhesion (2 cases), and oncological factors (2 cases) were the reasons. In the multivariable analysis, the tumor located in segments 7 or 8 (p = 0.002) was evaluated as a predictor of conversion to HALS. Pure LLR and HALS were associated with less blood loss than conversion to OLR (p = 0.005 and p = 0.014, respectively). However, there was no significant difference in operation time, hospital stay, or severe complications. CONCLUSIONS: The predictor of conversion to HALS was a tumor located in segments 7 or 8. The outcome of conversion to HALS was not inferior to pure LLR in terms of bleeding, operation time, hospital stay, or severe complication.

Efficacy and safety of preoperative chemoradiotherapy with S-1 for advanced rectal cancer: a phase II study.

Background: Preoperative chemoradiotherapy (CRT) for patients with rectal cancer is not yet established in Japan. We aimed to evaluate the efficacy and safety of preoperative CRT with S-1, a fixed-dose combination of tegafur, gimeracil, and oteracil potassium. Materials and methods: We conducted a prospective, interventional, non-randomized single-center study. Radiotherapy was administered at a total dose of 45 Gy (1.8 Gy in 25 fractions) for five weeks. S-1 was administered orally for nine weeks (five weeks during and four weeks after radiotherapy) at a dose of 80 mg/m2/day. The endpoint was the pathological complete response (pCR) rate. Results: Twenty-eight patients were finally enrolled. The following patient characteristics were recorded: clinical Stage (II: n = 12, III: n = 16), median age (66 years, range 40-77 years), male/female ratio (20/8), and lesion site (Ra-Rb:3/Rb:23/Rb-P:2). Preoperative treatment was completed in 27 patients (96%). Treatment abandonment occurred because of diarrhea. Grade 3 or higher adverse events were observed in one (4%) patient with two events. No serious adverse events occurred in the ≥ 70 years group. The response rate was 68% in all patients and 68% among elderly patients. Radical resection was achieved in all patients, including 19 (68%) who underwent sphincter-preserving surgery. The pCR rate was 11% (three patients). The five-year disease-free survival rate was 68%, and the overall survival rate was 82%. Local recurrence occurred in only one patient five years after surgery. Conclusion: Preoperative CRT with S-1 alone may be a safe and acceptable regimen from the perspective of adverse events and oncological outcomes. Trial registration: UMIN Clinical Trial Registry: UMIN000013598. Registered 1 April 2014, https://upload.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recpt-no=R000015887.

Is High Score of Preoperative Lactate Dehydrogenase to Albumin Ratio Predicting Poor Survivals in Esophageal Carcinoma Patients?

PURPOSE: The lactate dehydrogenase-to-albumin ratio (LAR) has been reported as a potential prognostic biomarker in various cancers; however, only a few pieces of information have been reported on esophageal cancer. Therefore, this study aimed to evaluate the prognostic significance of preoperative LAR in patients with esophageal cancer. METHODS: This study included 236 patients (193 men and 43 women; mean age of 66 years [range, 41-83 years]) with esophageal cancer who underwent curative surgery between September 2008 and March 2020. A total of 107 patients underwent upfront surgery, and 129 patients received neoadjuvant treatment. Patients were assigned into two groups, high and low LAR, based on preoperative LAR using a cutoff value of 6.2. The clinicopathological and prognostic significance of preoperative LAR was evaluated in univariate and multivariate analyses. RESULTS: Patients with deep tumors and neoadjuvant treatment were significantly associated with high LAR (p <0.05). The high LAR group showed a significantly poorer prognosis than the low LAR group (p <0.01). The multivariate analysis for the overall survival showed that deep tumors, lymph node metastasis, and high LAR were independent poor prognostic factors (p <0.05). CONCLUSION: High LAR was a useful poor prognostic biomarker in patients with esophageal cancer.

[Surgical Resection as Local Therapy for Sister Mary Joseph's Nodule Due to Pancreatic Tail Cancer].

We experienced a case of resection of a metastatic umbilical tumor(Sister Mary Joseph's nodule: SMJN)derived from a pancreatic tail carcinoma. The patient was a 70-year-old woman. She visited her previous doctor with a chief complaint of lower abdominal pain and came to our hospital due to suspicion of pancreatic tail cancer. She was found to have metastases to multiple organs which was unresectable by surgery. After chemotherapy up to the second-line of treatment, she was diagnosed to have progressive disease. The decision was made to provide the best supportive care for the patient. Thereafter, the patient developed SMJN. She had hemorrhage from the tumor accompanied by body movement, and her activity of daily living became impaired. She had difficulty controlling the bleeding despite repeated hemostatic treatment at the outpatient clinic and at her home. However, she required frequent blood transfusions for her severe anemia. Therefore, we performed a resection of the SMJN to control bleeding and to relieve her symptoms. She had a good postoperative course and was discharged on the fifth postoperative day. Due to deterioration of her general condition, she expired on the 59th day after surgery. However, the patient was able to live at home without bleeding or pain by the umbilical tumor. The local resection was considered to be useful as a palliative surgical treatment for SMJN.

Prognostic and diagnostic significance of preoperative Jumonji domain­containing 6 antibodies in colorectal cancer.

Jumonji domain-containing 6 (JMJD6) protein has been reported to be upregulated in different cancer cells; however, to the best of our knowledge, no report has analyzed serum anti-JMJD6 antibodies (s-JMJD6-Abs) in patients with cancer. Therefore, the present study evaluated the clinical significance of s-JMJD6-Abs in patients with colorectal cancer. Preoperative serum samples were analyzed from 167 patients with colorectal cancer who underwent radical surgery between April 2007 and May 2012. The pathological stages were as follows Stage I (n=47), stage II (n=56), stage III (n=49) and stage IV (n=15). In addition, 96 healthy participants were analyzed as controls. s-JMJD6-Abs were analyzed by amplified luminescent proximity homology assay-linked immunosorbent assay. The cutoff value of s-JMJD6-Abs for detecting colorectal cancer was calculated to be 5,720 using the receiver operating characteristic curve. The positive rate of s-JMJD6-Abs was 37% in patients with colorectal cancer (61 of 167), independent of carcinoembryonic antigen or carbohydrate antigen 19-9 and p53-Abs. Clinicopathological factors and prognosis were compared between the s-JMJD6-Abs-positive group and the s-JMJD6-Abs-negative group. The s-JMJD6-Ab-positive status was significantly associated with older age (P=0.03), but was not associated with other clinicopathological variables. Regarding recurrence-free survival, the s-JMJD6-positive status was a significant poor prognostic factor in both univariate (P=0.02) and multivariate (P<0.01) analyses. Similarly, regarding overall survival, the s-JMJD6-Abs-positive status was a significant poor prognostic factor in both univariate (P=0.03) and multivariate (P=0.01) analyses. In conclusion, preoperative s-JMJD6-Abs was positive in 37% of patients with colorectal cancer and may be considered an independent poor prognostic biomarker.

Estrogen receptor beta expression in colitis-associated carcinoma in comparison with sporadic colonic tumor: An immunohistochemical study.

Background and Aim: The rate of ulcerative colitis (UC)-related colorectal cancer (colitis-associated carcinoma) is increasing. Estrogen receptor (ER) beta expression has been studied separately in patients with sporadic colorectal cancer and those with colitis-associated carcinoma. However, no study has compared the expression in both of these cancer types. The present study aimed to evaluate the relationship between colitis-associated carcinoma and ERs and assess whether the expression of ER beta influences cell proliferation. Methods: This study included 45 surgically operated colitis-associated carcinomas, 43 high-grade dysplasias, 34 low-grade dysplasias, 36 sporadic colorectal cancers, 44 high-grade adenomas, and 34 low-grade adenomas. ER beta expression was evaluated with immunohistochemistry. Results: Colitis-associated carcinoma showed significantly lower ER beta immunoexpression than sporadic colorectal lesions and high- and low-grade dysplasia. In seven colitis-associated carcinoma harboring both intensity score 3 (strong immunoexpression) and score 1 (weak immunoexpression) areas, the correlation among ER beta intensity, Ki-67, and p21 labeling index was assessed; an area with an ER beta intensity score of 3 showed a higher Ki-67 labeling index than that with score 1. In four out of the seven lesions, p21 labeling index was higher in the area of ER beta score 1 than in that of ER beta score 3. Conclusions: The data suggest that ER beta expression is an accelerating factor in colorectal tumors. This association may be lower in colitis-associated carcinoma than in sporadic colorectal cancer.

Which preoperative immunonutritional index best predicts postoperative mortality after palliative surgery for malignant bowel obstruction in patients with late-stage cancer? A single-center study in Japan comparing the modified Glasgow prognostic score (mGPS), the prognostic nutritional index (PNI), and the controlling nutritional status (CONUT).

PURPOSE: To compare the utility of preoperative immunonutritional parameter measures for predicting postoperative mortality following palliative surgery (PS) for malignant bowel obstruction (MBO) in patients with late-stage cancer. METHODS: The subjects of this retrospective study were 83 late-stage cancer patients with MBO who underwent PS between January, 2005 and December, 2018, at a single institution in Japan. We compared the modified Glasgow prognostic score (mGPS), the prognostic nutritional index (PNI), and the controlling nutritional status (CONUT) for predicting postoperative mortality following PS in these patients. RESULTS: The most prevalent cancer in the patients who underwent PS was colorectal cancer (54.2%), followed by gastric cancer (24.1%). Postoperative complications of Clavien-Dindo classification grade ≥ 2 developed in 32 (38.6%) patients and stoma-related complications developed in 26 (31.3%) patients. There were 15 (18.1%) patients with 60-day mortality, 22 (26.5%) with 90-day mortality, and 4 (4.8%) with 30-day mortality. Multivariable analysis identified only mGPS as being associated with 60-day mortality (odds ratio, 9.387; 95% confidence interval, 0.001-4.478; p = 0.049). The overall survival of patients with a mGPS score of 2 was significantly worse than that of those with a mGPS score of < 2 (p = 0.013). CONCLUSIONS: These results suggest that the mGPS is a good predictor not only of 60-day mortality, but also of the overall survival of patients with late-stage cancer and MBO.

[Successful Continuation of Treatment in Advanced Colorectal Cancer by Switching to a Prior Biologic Agent after Emergence of Bevacizumab Allergy to a Biosimilar Drug-A Case Report].

Biosimilar(BS)drugs have recently been introduced owing to concerns with healthcare economics. In this report, we present a case in which a patient discontinued bevacizumab treatment following an allergic reaction to a BS formulation of bevacizumab but was able to safely continue treatment by switching to an original bevacizumab formulation in the late-line setting. The patient was a 66-year-old man diagnosed with unresectable colorectal cancer with synchronous multiple liver metastases. After primary tumor resection, chemotherapy including the original bevacizumab formulation was initiated. Allergic reactions to the BS formulation of bevacizumab occurred during the second-line treatment; however, in the late-line setting, switching back to the original bevacizumab formulation enabled the safe continuation of therapy. Overall, our case study suggests that switching of biologic agents may contribute to the ongoing management of chemotherapy.

[Treatment Strategy for Familial Adenomatous Polyposis Presenting with Obstructive Colorectal Cancer and Concurrent Liver Metastasis].

A 27-year-old man was referred to our hospital for a detailed examination of abdominal distention, bloody stool, anorectal pain, and weight loss. A colonoscopy revealed a circumferential type 2 tumor at 9 cm from the anal verge which was diagnosed as an adenocarcinoma based on biopsy. Contrast-enhanced CT of the abdomen showed an elevated perineal lipid concentration in the rectum(Ra)which was suspicious for clinical T4a stage, and simultaneous S7/8 liver metastasis. We strongly suspected familial adenomatous polyposis(FAP)because his mother had a past history of total proctocolectomy for FAP. We decided to first create a loop stoma at the transverse colon for the obstructive rectal cancer, and then administer neoadjuvant chemotherapy(mFOLFOX6 plus panitumumab). We performed total proctocolectomy with permanent stoma and S8 ventral resection for the liver metastasis after 5 courses of mFOLFOX6 plus panitumumab. As for clinicopathological findings, round 50 polyps were identified in the colon and rectum, and rectal cancer invaded into the muscularis propria. Finally, the patient was diagnosed as a clinically attenuated FAP with ypT2 rectal cancer.

Transanal down-to-up dissection of the distal rectum as a viable approach to achieve total mesorectal excision in laparoscopic sphincter-preserving surgery for rectal cancer near the anus: a study of short- and long-term outcomes of 123 consecutive patients from a single Japanese institution.

BACKGROUND: In rectal cancer (RC) surgery, the complexity of total mesorectal excision (TME) in laparoscopic sphincter-preserving surgery (lap-SPS) for RC near the anus has been a critical issue. Recently, technical assistance via the anus for complete TME has been receiving attention. This study aimed at clarifying the transanal down-to-up dissection viability for achieving TME in lap-SPS for RC near the anus. METHODS: We evaluated surgical and oncological outcomes of a total of 123 consecutive patients undergoing either a transanal rectal dissection (TARD) under direct vision mobilizing the most difficult portion of TME via the anus or the transanal TME by using an endoscopic system (TaTME) for achieving TME in lap-SPS for RC near the anus between January 2006 and February 2021. RESULTS: A total of 123 consecutive patients (83 men) with a median age of 66 years (range 33-86 years) were included. TARD and TaTME were performed for 50 (40.7%) and for 73 (59.3%) patients, respectively. Preoperative treatment was performed for 40 (32.5%) patients, resulting in a complete pathological response in 5 (12.5%) patients. Intersphincteric resection was performed significantly more in the TARD group (p<0.001). Although the TaTME group needed a longer operative time at the transanal portion (p<0.001), the median blood loss was lower (p<0.001). Postoperative complications with the Clavien-Dindo classification grade ≧2 developed in 52 (42.3%) patients. Urinary dysfunction and stoma-related complications were found most frequently. More patients needing medication for urinary dysfunction were found in the TARD group, but a significant difference was not observed (10.0% vs. 6.8%, p=0.526). The quality of TME was good for almost all patients. Recurrence developed in 18 (14.6%) patients. The 5-year overall survival (OS) and relapse-free survival (RFS) rates in 123 patients were 95.8% and 88.8%, respectively. The 5-year OS and RFS between the two groups were comparable. CONCLUSIONS: Our data suggested that a transanal down-to-up dissection of the distal rectum might be a viable approach in lap-SPS for RC near the anus. Further studies are needed to examine the differences between TARD and TaTME.

Preoperative CRP(-)/CEA(-)/CA19-9(-)/non-T4 in Stage III Colorectal Cancer Is Favorable Risk for Recurrence.

Objectives: We evaluated the prognostic impact of a novel C-reactive protein (CRP) cut-off value (0.6 mg/dl) and carcinoembryonic antigen (CEA)/carbohydrate antigen 19-9 (CA19-9) in stage II/III colorectal cancer. Methods: Four hundred ninety-eight patients with stage II (n = 275) or stage III (n = 223) colorectal cancer, surgically treated between January 2010 and December 2016, were analyzed. The optimal CRP cut-off value was fixed at 0.6 mg/dl to predict recurrence based on the receiver operating characteristic curve. Prognostic factors, including CRP/CEA/CA19-9 status, for relapse-free survival (RFS) were evaluated by multivariate analysis. Results: Recurrent rates were 15% and 32% in stages II and III, respectively. In stage II, CRP, CEA, and CA19-9 were not significant prognostic factors for RFS. In stage III, the RFS of the low CRP group was significantly better than that of the high CRP group (p = 0.002). In stage III, the RFS of CRP(-)/CEA(-) or CRP(-)/CA19-9(-) was significantly better than the other group, as opposed to the RFS of the CEA(-)/CA19-9(-) group that was not. The CRP(-)/CEA(-)/CA19-9(-) group recurrence rate in stage III was significantly better than the CRP(+)/CEA(-)/CA19-9(-) group (20% vs. 50%, p = 0.006). Multivariate analysis revealed that CRP(-)/CEA(-)/CA19-9(-) (p = 0.04) and non-T4 (p < 0.001) were good independent prognostic factors in stage III. The CRP(-)/CEA(-)/CA19-9(-)/non-T4 group recurrence rate in stage III was 11% (8 out of 73). Conclusions: In stage III, the CRP(-)/CEA(-)/CA19-9(-)/non-T4 group is favorable risk for recurrence.

Predictors of a difficult Pringle maneuver in laparoscopic liver resection and evaluation of alternative procedures to assist bleeding control.

PURPOSE: To evaluate the predictors of a difficult Pringle maneuver (PM) in laparoscopic liver resection (LLR) and to assess alternative procedures to PM. METHODS: Data from patients undergoing LLR between 2013 and 2020 were reviewed retrospectively. Univariate and multivariate analyses were performed and the outcomes of patients who underwent PM or alternative procedures were compared. RESULTS: Among 106 patients who underwent LLR, PM could not be performed in 18 (17.0%) because of abdominal adhesions in 14 (77.8%) and/or collateral flow around the hepatoduodenal ligament in 5 (27.8%). Multivariate analysis revealed that Child-Pugh classification B (p = 0.034) and previous liver resection (p < 0.001) were independently associated with difficulty in performing PM in LLR. We evaluated pre-coagulation of liver tissue using microwave tissue coagulators, saline irrigation monopolar, clamping of the hepatoduodenal ligament using an intestinal clip, and hand-assisted laparoscopic surgery as alternatives procedures to PM. There were no significant differences in blood loss (p = 0.391) or transfusion (p = 0.518) between the PM and alternative procedures. CONCLUSIONS: Child-Pugh classification B and previous liver resection were identified as predictors of a difficult PM in LLR. The alternative procedures were found to be effective.

Prognostic significance of preoperative low serum creatine kinase levels in gastric cancer.

PURPOSE: We evaluated the clinicopathological and prognostic significance of preoperative serum creatine kinase (CK) levels in gastric cancer. PATIENTS AND METHODS: The subjects of this retrospective study were 942 patients who underwent surgery without preoperative chemotherapy for gastric cancer (643 men and 299 women), excluding Stage IV gastric cancer, between January, 2001 and December, 2020. We set the cutoff values for CK according to gender, as 64 U/L for men and 57 U/L for women, and evaluated the clinicopathological, prognostic, and gender significance of low CK levels by multivariate analysis. RESULTS: Tumor depth was significantly associated with low serum CK levels (p < 0.001). The low CK group showed significantly worse overall survival than the high CK group (p = 0.01). The prognostic impact of low CK levels was evident only in men (p = 0.009). In women, low CK levels were not an independent risk factor for poor prognosis (p = 0.33). These prognostic impacts of low CK levels on overall survival and recurrence-free survival were similar. CONCLUSION: Low preoperative CK levels in men with gastric cancer were predictive of poor survival. These prognostic impacts of low CK levels were not evident in women.

Serum WT1-271 IgM antibody as a novel diagnostic marker for Gastric Cancer.

The Wilms tumor 1 gene, WT1, is overexpressed in various types of cancer, including gastric cancer. The product of WT1 is highly immunogenic and is a promising target molecule for cancer immunotherapy. The current study aimed to examine the production of WT1-specific IgG and IgM autoantibodies to identify biomarkers of diagnostic value in patients with gastric cancer. IgG antibodies that bind to WT1-derived peptides were obtained, the serum levels of which correlate with those of IgG antibodies against the WT1 protein in patients with intestinal malignancies. The serum levels of IgG and IgM antibodies against the WT1-271 peptide (271-288 amino acids) were examined in 39 healthy individuals and 97 patients with gastric cancer. The positivity cutoff value was determined according to the receiver operating characteristic curve. The association between WT1-271 IgM and the clinicopathological factors and prognosis of patients was additionally analyzed. The results revealed that serum WT1-271 IgM antibody levels in patients with gastric cancer were significantly higher than those in healthy individuals. The sensitivity and specificity of this antibody for gastric cancer were 67.0 and 71.8%, respectively; this sensitivity was improved when compared with conventional tumor markers (P<0.001). There was no statistical difference in WT1-271 IgG antibody levels between patients with gastric cancer and healthy individuals. Serum WT1-271 IgM antibody levels were not significantly associated with clinicopathological factors but were associated with unfavorable prognosis. Serum WT1-271 IgM antibody levels could serve as a diagnostic biomarker in patients with gastric cancer.

Characteristics of anal canal cancer in Japan.

Anal canal cancer (ACC) has been reported to be an uncommon cancer in Japan, as in the USA, Europe, and Australia. This retrospective multi-institutional study was conducted to clarify the characteristics of ACC in Japan. First, the histological ACC type cases treated between 1991 and 2015 were collected. A detailed analysis of the characteristics of anal canal squamous cell carcinoma (SCC) cases was then conducted. The results of the histological types revealed that of the 1781 ACC cases, 435 cases (24.4%) including seven cases of adenosquamous cell carcinomas were SCC and 1260 cases (70.7%) were adenocarcinoma. However, the most common histological type reported in the USA, Europe, and Australia is SCC. Most ACC cases are adenocarcinomas and there is a low incidence of SCC in Japan which is different from the above-mentioned countries. Moreover, we reclassified T4 into the following two groups based on tumor size: T4a (tumor diameter of 5 cm or less) and T4b (tumor diameter of more than 5 cm). The results of the TNM classification of SCC revealed that the hazard ratio (HR) to T1 of T2, T3, T4a, and T4b was 2.45, 2.28, 2.89, and 4.97, respectively. As T4b cases had a worse prognosis than T4a cases, we propose that T4 for anal canal SCC in Japan be subclassified into T4a and T4b.