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    Acta medica Okayama

    Acta medica Okayama

    JournalISSN 0386-300XeISSN 0386-300X中科院 医学 4区

    年发文量

    研究主题

    论文(3443)

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    1Hemorrhage from a Jejunal Lymphangioma.
    Sachiko Ishikami, Shuta Tamura,Motoyasu Tabuchi, Nao Yamamoto, Yuki Okamoto,Rika Yoshimatsu,Manabu Matsumoto,Jun Iwata,Takehiro Okabayashi

    Lymphangioma is a benign tumor arising from lymphatic vessel proliferation and most commonly occurs in the head, neck, or axilla. Involvement of the small intestine is rare and is often overlooked as a source of obscure gastrointestinal bleeding. Because jejunal lymphangiomas frequently present with nonspecific symptoms and may escape detection by conventional upper and lower gastrointestinal endoscopy or cross-sectional imaging, diagnosis is often delayed. Advances in balloon-assisted enteroscopy have enabled direct visualization of small intestinal lesions, facilitating accurate diagnosis and appropriate therapeutic decision-making. Here, we report a case of jejunal lymphangioma presenting with severe anemia due to active bleeding, which was detected by double-balloon endoscopy and successfully managed by laparoscopic-assisted resection. This case highlights the importance of considering small intestinal lymphangioma in the differential diagnosis of unexplained gastrointestinal bleeding and underscores the clinical utility of deep enteroscopy in identifying rare but clinically significant small bowel tumors.

    2026
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    2Post-Tracheostomy Fistula Formation Between the Trachea and Left Common Carotid Artery in a Pediatric Patient with Trisomy 18.
    Tsuyoshi Shiina,Hirokazu Watanabe,Junko Yoshimoto,Takeshi Sato,Daisaku Morimoto,Tomoka Okamura,Terutaka Tanimoto,Yosuke Washio, Takanori Oyama,Hirokazu Tsukahara,Takuo Noda

    The long-term survival of individuals with trisomy 18 has improved, and the need for tracheostomy in this population has thus increased. We describe the case of a 3-year-old Japanese boy with trisomy 18 who developed a tracheoarterial fistula involving the left common carotid artery (LCCA). He underwent an emergency tracheostomy for respiratory failure secondary to pneumonia. Massive hemorrhage from the tracheostoma occurred on postoperative day 31, leading to his death. The autopsy revealed that the LCCA originated from the brachiocephalic trunk and coursed medially, forming a fistulous connection with the trachea. This case highlights the clinical importance of preoperative vascular mapping in patients with chromosomal abnormalities.

    2026
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    3The Impact of Migraine on Cerebral Artery Dissection.
    Kenichi Kashihara,Toshikazu Hamaguchi, Yasuko Takeda

    The impact of migraines as a risk factor for cervicocerebral artery dissection was retrospectively investigated in patients who had a cervicocerebral artery dissection. We first evaluated the patients' medical records and history of migraine and then calculated the proportion of patients with migraine as well as the relevant vascular risk factors. The prevalence of migraine with respect to the location of the cervicocerebral artery dissection was also identified. Sixty-two patients (37 men, 25 women) had both a cerebral artery dissection and a record of migraine. Among them, 93.5% presented with an isolated headache, and 6.5% presented with a related stroke. Regarding the locations of the artery dissection, 56 (90.3%) were in the intracranial vertebral artery (VA), three (4.8%) were in the internal carotid artery, and one case each (1.6%) was in an anterior cerebral artery, basilar artery (BA), and both the VA and BA. Among the patients with VA dissection, 42 (73.7%) presented with migraines. Among the four patients with dissection of an artery of anterior circulation, only one (25%) had a migraine history. The frequency of migraines tended to be higher in the patients with VA dissection compared to those with a dissection of arteries of anterior circulation. These data suggest that (i) migraine is a potent risk factor for cerebral artery dissection, especially intracranial VA dissection, and (ii) the intracranial VA may be more susceptible to dissection compared to arteries of anterior circulation.

    2026
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    4Spinous Process Plate Fixation Alone for an AO Spine Osteoporotic Fracture (OF) 5 Diffuse Idiopathic Skeletal Hyperostosis (Dish)-Associated Thoracolumbar Fracture in a Nonagenarian.
    Satoru Yabuno,Masatoshi Yunoki, Saori Takeuchi,Koji Hirashita

    Diffuse idiopathic skeletal hyperostosis (DISH) predisposes the spine to highly unstable fractures because of long lever-arm biomechanics. Unstable injuries, including AO Spine Osteoporotic Fracture (OF) type 5, are typically treated with long-segment posterior instrumentation; however, pedicle-screw fixation may be infeasible in very elderly patients with severe osteoporosis, critically narrow pedicles, and/or significant comorbidities. A 93-year-old Japanese woman presented with severe back pain without apparent trauma. Computed tomography (CT) revealed a T12 fracture with DISH, classified as OF5. The pedicles were critically narrow (3.7-4.1 mm), and dual-energy X-ray absorptiometry confirmed severe osteoporosis. Because conventional pedicle-screw fixation was considered technically unsafe and excessively invasive, limited posterior stabilization was performed using a single spinous process plate spanning T10-L1. The operative time was 48 min and the estimated blood loss was 10 ml. Immediate postoperative CT confirmed appropriate implant positioning and maintained alignment. At the 1-year follow-up, CT demonstrated solid bony union with preserved alignment and no implant failure; the patient had remained pain-free and ambulatory. This case demonstrates that spinous process-plate fixation can be a minimally invasive salvage option for carefully selected very-elderly patients with DISH when pedicle-screw instrumentation is not feasible.

    2026
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    5Regional Prevalence of Carbapenemase-Producing Enterobacterales and Extended-Spectrum Beta-Lactamase-Producing Enterobacterales in Okayama and Neighboring Prefectures, Japan.
    Sakura Ogawa,Shinnosuke Fukushima,Hidemasa Akazawa, Sachie Namba, Chiyoko Hirota, Tomoyoshi Kishiue, Shohei Ibara, Takayuki Kondo, Genshi Fukuda,Koji Iio,Shuma Tsuji,Kazuyoshi Gotoh,

    Carbapenemase-producing Enterobacterales (CPE) and extended-spectrum β-lactamase (ESBL)-producing Enterobacterales (ESBL-E) are representative antimicrobial-resistant pathogens. We investigated the prevalence of CPE and ESBL-E in Okayama, Japan to clarify their current epidemiology and potential clinical burden. Active surveillance for CPE and ESBL-E was performed first, using stool samples submitted to the Okayama Medical Laboratory (Japan) in the years 2024-2025. Screening was performed using a selective agar (CHROMagar mSuper CARBA/ESBL). Phenotypic identification was conducted with the use of a modified carbapenem inactivation method and double-disk phenotypic confirmatory tests. Clinical information including patient age, sex, sampling date, and hospital address were collected, and the data were analyzed according to specimen origin (hospitals, clinics, and health checkups). A total of 2,000 stool samples were screened, of which two CPE isolates (0.1%) and 285 ESBL-E isolates (14.3%) were identified. By specimen origin, the ESBL-E positivity rate was significantly higher in hospitals (17.4%) than in clinics (11.8%). By age category, the late elderly (> 75 years) exhibited the highest ESBL-E positivity rate (22.6%) compared to other age groups. In the clinics and health checkups, infants (0 years) demonstrated high ESBL-E positivity rates (18.2% and 14.3%, respectively). Escherichia coli was the most common ESBL-E organism in the hospitals (77.2%), clinics (88.8%), and health checkups (87.5%). Our active screening demonstrated that the prevalences of CPE and ESBL-E were within the reported ranges; however, in this era of increasing internationalization, continuous surveillance of these notifiable pathogens is warranted.

    2026
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    高被引作者

    作者引用发文
    Toshifumi Ozaki174094
    Kunzo Orita140564
    T Tsuji130455
    Zensuke Ota129552
    Hiromi Kumon118135
    Susumu Kanazawa117660
    Hirofumi Makino98429
    Yuji Hiramatsu90839
    Katsuyuki Kiura83235
    Toshiyoshi Fujiwara83149

    高产作者

    作者引用发文
    Toshifumi Ozaki174094
    Kunzo Orita140564
    Susumu Kanazawa117660
    T Tsuji130455
    Zensuke Ota129552
    Okada Hiroyuki66652
    Toshiyoshi Fujiwara83149
    Yuji Hiramatsu90839
    Fumio Otsuka53437
    Hiromi Kumon118135

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