BACKGROUND: Our previous observational cohort study, the Kashima Scan Study (KSS), identified associations between lifestyle, cerebral small vessel disease (SVD) as detected by magnetic resonance imaging of the brain, and disease outcomes including cognitive impairment and vascular diseases. However, established modifiers of the outcomes such as genetic background, drinking and exercise habits, and socioeconomic status were not considered. Regarding genetic factors in particular, the ALDH2 rs671 variant, East Asian-specific diversity, and APOE status are expected to have strong effects. The aim of KSS-2 is to examine the interactions of genetic background, lifestyle factors including drinking habit, socioeconomic status, and/or SVD markers for cognitive impairment, vascular disease, and death. METHOD: The KSS-2 is a prospective regional observational study of a healthy Japanese cohort that will clarify lifestyle habits to better maintain brain health from midlife by genotype. Japanese adults who underwent brain health checkups at their own expense are enrolled and will be followed-up for 10 years. We will extend the protocol of the KSS to include genetic background and potential confounding factors, including lifestyle (including drinking and exercise habit) and socioeconomic status, and perform survival analyses. The study outcomes are cognitive impairment, vascular events, and death. RESULTS: We enrolled 908 healthy adults (mean age 64.2 years; range 35 to 84 years; 41% male) from September 1, 2018 until December 31, 2024. CONCLUSION This study will provide important insights into the development of individualized health intervention strategies.
Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Male ; Middle Aged ; Cerebral Small Vessel Diseases/diagnostic imaging* ; Japan/epidemiology* ; Life Style ; Magnetic Resonance Imaging ; Prospective Studies ; Observational Studies as Topic

Background/Aims: Symptoms of irritable bowel syndrome (IBS), a common gut-brain interaction disorder, deteriorate patients’ quality of life and increase medical needs; therefore, IBS represents a significant global burden. The estimated global prevalence is approximately 10%; however, accumulated evidence shows international heterogeneity. In this study, we have described and compared the prevalence of IBS in 3 East Asian countries: Japan (Tokyo and Fukuoka), China (Beijing), and South Korea (Seoul). Methods: We conducted an internet-based cross-sectional survey of the urban population aged > 20 years in the abovementioned countries. We recruited equal numbers of age- (20s-60s) and sex-matched participants (3910 residents). IBS was diagnosed according to the Rome III criteria, and the subtypes were analyzed. Results: The overall prevalence of IBS with 95% CI was 12.6% (11.6-13.7); the prevalence was significantly different across Japan, China, and South Korea (14.9% [13.4-16.5], 5.5% [4.3-7.1], and 15.6% [13.3-18.3], respectively) (P < 0.001). Furthermore, 54.9% of patients were male. IBS-mixed was the most prevalent subtype; the prevalence of other subtypes varied. Conclusions The overall prevalence of IBS in the 3 countries was slightly higher than the global prevalence, and it was significantly lower in China than in Japan and South Korea. IBS prevalence was the highest and lowest among individuals in their 40s and 60s, respectively. Male individuals had a higher prevalence of IBS with diarrhea. Further studies are needed to elucidate the factors associated with this regional heterogeneity.

Left-sided gallbladder is a rare finding that is mostly discovered incidentally during surgery and is often associated with anatomic anomalies. We herein report a case in which laparoscopic cholecystectomy and common bile duct exploration were achieved for an 89-year-old female patient with left-sided gallbladder. Surgery was carried out using our usual trocar position.Calot triangle was covered by the body of the gallbladder and could not be detected. We dissected the gallbladder from the fundus towards the neck. The cystic duct joined the common bile duct from the right side, and common bile duct exploration was performed routinely without perioperative comorbidities. Although the preoperative diagnosis rate is low and the risk of intraoperative bile duct injuries in patients with left-sided gallbladder is high, laparoscopic cholecystectomy and common bile duct exploration can be safely performed by understanding the location and bifurcation of the cystic duct.

The patient was a 76-year-old woman who developed involuntary movements in both hands and gait disorder. Weakness in both lower limbs gradually worsened, and she was referred to our hospital. Neurological findings included spastic paraplegia, deep sensory disturbance, sensory ataxia, and bladder and bowel dysfunction. Approximately 4 months after the onset, she became unable to walk independently and had to use a walker. MRI showed a long spinal cord lesion extending from the cervical to thoracic spinal cord. Blood and spinal fluid samples tested positive for anti-human T-cell leukemia virus type 1 (HTLV-1) antibodies. Given these findings and subacute course, she was diagnosed with rapidly progressive HTLV-1 associated myelopathy (HAM). High levels of neopterin and CXCL10 in the cerebrospinal fluid suggested high disease activity；thus, she underwent steroid pulse therapy followed by treatment with maintenance oral prednisolone in our convalescent rehabilitation ward. After approximately 3 months of muscle strength training, mainly for the trunk muscle and the proximal muscle of the lower limbs, and balance exercise, she was able to walk independently and her activities of daily living (ADL) and instrumental ADL (IADL) improved；however, dysuria persisted. The use of clean intermittent self-catheterization instead of indwelling urethral catheter improved her quality of life (QOL). Although rapidly progressive HAM is generally associated with poor prognosis, steroid therapy combined with comprehensive rehabilitation treatment was effective in the present case.

The patient was a 76-year-old woman who developed involuntary movements in both hands and gait disorder. Weakness in both lower limbs gradually worsened, and she was referred to our hospital. Neurological findings included spastic paraplegia, deep sensory disturbance, sensory ataxia, and bladder and bowel dysfunction. Approximately 4 months after the onset, she became unable to walk independently and had to use a walker. MRI showed a long spinal cord lesion extending from the cervical to thoracic spinal cord. Blood and spinal fluid samples tested positive for anti-human T-cell leukemia virus type 1 (HTLV-1) antibodies. Given these findings and subacute course, she was diagnosed with rapidly progressive HTLV-1 associated myelopathy (HAM). High levels of neopterin and CXCL10 in the cerebrospinal fluid suggested high disease activity；thus, she underwent steroid pulse therapy followed by treatment with maintenance oral prednisolone in our convalescent rehabilitation ward. After approximately 3 months of muscle strength training, mainly for the trunk muscle and the proximal muscle of the lower limbs, and balance exercise, she was able to walk independently and her activities of daily living (ADL) and instrumental ADL (IADL) improved；however, dysuria persisted. The use of clean intermittent self-catheterization instead of indwelling urethral catheter improved her quality of life (QOL). Although rapidly progressive HAM is generally associated with poor prognosis, steroid therapy combined with comprehensive rehabilitation treatment was effective in the present case.

The degree of intermittent claudication is difficult to evaluate objectively; therefore, the therapeutic efficiency of a drug is difficult to test in patients suffering from intermittent claudication. The purpose of this paper is to know whether treadmill test is useful to evaluate objectively the degree of intermittent claudication. 20 patients suffering from a peripheral arterial occlusive disease with intermittent claudication (Stage II) were investigated. PGE₁ incorporated in lipid microspheres (Lipo PGE₁) was infused (10μg/day) with one shot on 7 consecutive days into the forearm vein of patients. Painfree walking distance and maximum walking distance were measured on treadmill (3.0km/h, 5% incline). Brachial systolic pressure and ankle pressures were measured before and after exercise, and ankle/arm pressure ratio and ankle pressure difference between the pre-exercise and post-exercise values were calculated. All measurements were performed before and 7 days after beginning of treatment. Painfree walking distance was prolonged from 72.5±41.4m before treatment to 92.0±53.7m after treatment, with significant difference (p<0.01). However, no significant changes of ankle/arm pressure ratio, ankle pressure difference and maximum walking distance were observed. It is concluded that measurement of painfree walking distance on treadmill was useful to evaluate objectively the degree of intermittent claudication.