Recent advances in both diagnostic and therapeutic technologies have caused dramatic changes in treatment strategy for esophageal cancer patients. In this lecture, we will introduce the advances in multimodal treatment for esophageal cancer, based on our own experiences. 1. Neoadjuvant chemotherapy (NAC) with Docetaxel/Cisplatin/5-fluorouracil (DCF) for node-positive esophageal cancer. Recently, in Japan, an efficacy of NAC for resectable advanced squamous cell carcinoma of the esophagus has been reported. DCF is expected to be a powerful alternative to cisplatin/5-fluorouracil. Our experience on neoadjuvant or induction DCF will be demonstrated. 2. Efficacy and safety of salvage esophagectomy after dCRT. Salvage esophagectomy is an almost only method to cure the patients with local failure after dCRT, although high mortality and morbidity rates have been reported. We performed 40 cases of salvage esophagectomy during the last 7 years and no hospital mortality has been experienced. Benefit of salvage surgery and procedures to decrease surgical risk will be discussed. 3. Basic research for individualized treatment. If an individualized treatment strategy can be established based on some predictive markers, both improved survival and preserved quality of life will be realized. We will demonstrate the possibility of epigenetic analysis (e.g., LINE-1 methylation level) as biomarkers to predict patient prognosis.

In Hokkaido, the number of work-related deaths has been decreasing owing to increased safety measure implementation. However, safety measures for non-life-threatening injuries are considered to be insufficient. To reveal the status of non-life-threatening work-related injuries in Tokachi district, we investigated patients with work-related injuries who visited the Orthopaedic Surgery Department of our hospital, which has the only Emergency and Critical Care Center in the district, and examined in detail patients who needed multiple operations. All patients in the Department of Orthopaedic Surgery who had worker’s accident insurance were included in this study. We investigated age, sex, occupation, injury cause, injury site (upper extremity, lower extremity, and/or spine), diagnosis, and number of operations. There were 818 cases of work-related injuries and mean age was 47 (16-82) years. Regarding injury site, 482 patients had upper extremity injury, 273 had lower extremity injury, and 123 had spinal injury. Regarding number of operations, 371 patients had operations and 37 (28 upper extremity injuries and 11 lower extremity injuries) underwent operations more than 3 times. In 19 cases, injuries were caused by the primary industry of employment and 14 by a secondary industry; 19 cases were due to the patient being caught in an industrial machine, mostly agricultural harvesters. Severe injury requiring surgery occurred more than 3 times involved complex injury in the upper extremity or open fracture with soft tissue defect. In Tokachi district, severe limb injury is typically accompanied by soft tissue damage and requires long-term treatment including multiple operations. In future studies, it will be important to conduct detailed evaluation of non-life-threatening work-related injuries, including severe limb injury, and to establish relevant safety measures for such injuries especially those occurring in agricultural workers.

The balance between treatment and farming work must be considered when performing hand surgery in farmers, but no studies have previously examined the level of busyness in farmers in detail. We conducted a questionnaire survey on busyness by month and desirable time for hand surgery in 20 self-employed farmers in the Tokachi region of Hokkaido who had undergone hand surgery. Busyness in crop farming peaked approximately in May for fertilizer application, sowing, and raising and transplanting seedlings and in August-October for harvesting and transporting crops. On the other hand, livestock farmers were busy with rearing management throughout the year, with a peak of busyness in May-October for fertilizer application, sowing, and harvesting and transporting forage crop. Given the approximately 3-month period of work restriction following hand surgery, all respondents wished to have this period from November to January. If a farmer is injured during the peak farming period, a treatment plan is required that supports an early return to work and allows for two-stage reconstruction and treatment of degenerative disease in the quiet period for farming. Meanwhile, almost no respondents expected to receive support from official organizations and manufacturers, indicating that there is a need to provide the government with information from a medical perspective.

Methods: A total of 14 patients with unilateral radicular symptoms and five healthy subjects were subjected to simultaneous apparent T2 mapping and neurography with nerve-sheath signal increased with inked rest-tissue rapid acquisition of relaxation enhancement signaling (SHINKEI-Quant) using a 3-Tesla magnetic resonance imaging. The Visual Analog Scale (VAS) score for neck pain and upper arm pain was used to evaluate clinical symptoms. T2 relaxation times of the cervical dorsal root ganglia of the brachial plexus were measured bilaterally from C4 to C8 in patients with radicular symptoms and from C5 to C8 in healthy controls. The T2 ratio was calculated as the affected side to unaffected side. Results: When comparing nerve roots bilaterally at each spinal level, no significant differences in T2 relaxation times were found between patients and healthy subjects. However, T2 relaxation times of nerve roots in the patients with unilateral radicular symptoms were significantly prolonged on the involved side compared with the uninvolved side (p<0.05). The VAS score for upper arm pain was not significantly correlated with the T2 relaxation times, but was positively correlated with the T2 ratio. Conclusions In patients with cervical radiculopathy, the SHINKEI-Quant technique can be used to quantitatively evaluate the compressed cervical nerve roots. The VAS score for upper arm pain was positively correlated with the T2 ratio. This suggests that the SHINKEI-Quant is a potential tool for the diagnosis of cervical nerve entrapment.

When treating finger, hand, and elbow trauma (hereinafter, surgically treated hand trauma) in self-employed farmers, it is also necessary to consider how the patient will be able to continue working in the family business. This study investigated return-to-work outcomes of self-employed farmers in the Tokachi area in Hokkaido, Japan after surgically treated hand trauma. A survey was conducted with 56 self-employed farmers (39 men and 17 women, median age 55 years). More than 80% of the farmers (n = 49) returned to their previous work, and most returned to work during the farming season while still experiencing functional impairment. Self-employed farmers with surgically treated hand trauma tend to return to work in time for the farming season regardless of the severity of functional impairment they are experiencing, and it is important for health care providers to recognize this fact and consider return-to-work support as part of the treatment plan in addition to treatment itself. Therefore, providers must understand the processes and details of tasks performed during each farming season and devise individualized measures to accommodate patients returning to work while still experiencing impairment. In cases where multiple treatments are required, such as two-stage functional reconstruction, it is also important that the treatment plan consider the farming season, for example, by having the patient temporarily return to work and then undergo surgery during the off season.

Objective: The purposes of this trial were to demonstrate the feasibility and effectiveness of the hybrid of intracavitary and interstitial brachytherapy (HBT) for locally advanced cervical cancer patients in the phase I/II prospective clinical trial. Methods: Patients with FIGO stage IB2-IVA uterine cervical cancer pretreatment width of which was ≥5 cm measured by magnetic resonance imaging were eligible for this clinical trial. The protocol therapy included 30–30.6 Gy in 15–17 fractions of whole pelvic radiotherapy concurrent with weekly CDDP, followed by 24 Gy in 4 fractions of HBT and pelvic radiotherapy with a central shield up to 50–50.4 Gy in 25–28 fractions. The primary endpoint of phase II part was 2-year pelvic progression-free survival (PPFS) rate higher than historical control of 64%. Results: Between October 2015 and October 2019, 73 patients were enrolled in the initial registration and 52 patients proceeded to the secondary registration. With the median follow-up period of 37.3 months (range, 13.9–52.9 months), the 2- PPFS was 80.7% (90% confidence interval [CI]=69.7%–88%). Because the lower range of 90% CI of 2-year PPFS was 69.7%, which was higher than the historical control ICBT data of 64%, therefore, the primary endpoint of this study was met. Conclusion The effectiveness of HBT were demonstrated by a prospective clinical study. Because the dose goal determined in the protocol was lower than 85 Gy, there is room in improvement for local control. A higher dose might have been needed for tumors with poor responses.