Publications by authors named "Fumihiko Kato"

Introduction: Ileorectal fistulas following sigmoid colon vaginoplasty are rare. Reports on the management of the surgical complications of sex reassignment operations among transgender patients are few.

Presentation Of Case: A 40-year-old patient with a male-to-female sex identity disorder underwent sigmoid vaginoplasty for sex reassignment 4 months prior to presentation.

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Background: The authors report an extremely rare presentation of a patient with an intraforaminal cervical gas cyst with radiculopathy. The patient's condition was refractory to conservative treatment, and he was treated by anterior cervical discectomy and fusion (ACDF). Several intraspinal gas cysts with lumbar disc herniation have been treated surgically.

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Magnetic resonance imaging (MRI) system has frequently observed degenerative changes in the cervical discs of healthy subjects. Although there are concerns regarding the link between an individual's occupation and intervertebral disc degeneration (IDD) in the cervical spine, whether the occupation affects IDD is still not clear. This study aimed to evaluate the occupation and IDD interplay using cervical spine MRI among a cohort of healthy individuals, and to evaluate any association between the type of labor and IDD.

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The purpose of this study is to examine trends in spine surgeries at ten facilities over 15 years, and to analyze relationships with the number of spine surgeons at these facilities. The subjects were patients who underwent spine surgery at the ten facilities from 2003 to 2017. Data were collected every year via a questionnaire designed to obtain clinicopathological and surgical information.

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The aim of this study was to establish the age-related changes and gender-specific differences of cervical disc degeneration using magnetic resonance image (MRI) and to evaluate the correlation between the severity of cervical disc degeneration and mobility in asymptomatic subjects. A total of 1,211 relatively healthy volunteers (606 males and 605 females, mean age 49.5 years) without neurological symptoms underwent MRI.

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Article Synopsis
  • Pancreatic serous neoplasms are uncommon tumors, often benign, but distinguishing between benign (cystadenoma) and malignant (cystadenocarcinoma) forms can be challenging.
  • A case is presented involving a woman in her 60s who was diagnosed with serous cystadenoma; after resection, she was monitored for seven years, during which liver metastasis developed.
  • The diagnosis of metastatic serous cystadenocarcinoma was confirmed through imaging and subsequent liver surgery, highlighting specific imaging features that could aid in diagnosing this cancer with liver spread.
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Objective: Few studies have examined a possible correlation between cervical disc degeneration and disc height. The aim of this study was to establish age-related changes and sex-specific differences of cervical disc height using magnetic resonance imaging (MRI) and to evaluate the relationship between degree of cervical disc degeneration and disc height in asymptomatic subjects.

Methods: We measured the intervertebral disc anteroposterior diameter and disc height in each disc level using MRI in 1211 relatively healthy volunteers (606 men and 605 women, mean age 49.

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Meningiomas are benign tumors that are treated surgically. Local recurrence is likely if the dura is preserved, and en bloc tumor and dura resection (Simpson grade I) is recommended. In some cases the dura is cauterized and preserved after tumor resection (Simpson grade II).

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Introduction: Patients with esophageal cancers including carcinosarcoma sometimes have underlying liver cirrhosis because of a history of heavy drinking. It is definitely required to determine the appropriate surgical strategy and to manage the patients promptly when performing esophagectomy for the esophageal carcinosarcoma coexisting with alcoholic liver cirrhosis.

Presentation Of Case: A 56-year-old male patient with a history of chest pain and difficulty swallowing was admitted to our hospital.

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Objective: The purpose of this study was retrospectively to analyze the risk factors for non-union in Anderson-D'Alonzo type III odontoid fractures with conservative treatment.

Methods: 25 patients with type III fractures were analyzed. Coronal and sagittal tilt as well as sagittal and lateral mass gaps were measured by using computed tomography.

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Objective: The study aimed to establish the spinal cord occupation rate of the dural sac during flexion and extension.

Methods: We measured the cross-sectional area of the dural sac and the spinal cord between C2/C3 and C7/T1 disc levels in 100 patients with cervical spondylotic myelopathy and 1211 asymptomatic subjects.

Results: The spinal cord occupation rate of the dural sac in the cross-sectional area was higher on extension than on flexion at the mid-lower cervical spine.

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Purpose: Tandem spinal stenosis (TSS) refers to coexisting lumbar and cervical canal stenosis. Evidence regarding whether cervical decompression improves lumbar symptoms in TSS is insufficient. Therefore, we determined the effectiveness of cervical decompression surgery for patients with lumbar spinal stenosis (LSS) and cervical spinal stenosis.

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The minimum clinically important difference (MCID) of the Japanese Orthopaedic Association (JOA) score has been reported to be around 2.5 points in cervical myelopathy. This study sought to define significant predictive factors on achieving the MCID following laminoplasty in a large series of patients with cervical spondylotic myelopathy (CSM).

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Study Design: A cross-sectional analysis using T1 slope (T1S) and C7 slope (C7S) in asymptomatic individuals.

Objective: The aim of this study was to identify normative values, ranges of motion (ROMs), age-related changes in T1S and C7S, and correlation between the two slopes.

Summary Of Background Data: Few studies have reported age-related changes in the T1S and C7S angles.

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Objective: Although increased signal intensity (ISI) on MRI is observed in patients with cervical spinal cord injury (SCI) without major bone injury, alterations in ISI have not been evaluated. The association between postoperative ISI and surgical outcomes remains unclear. This study elucidated whether or not the postoperative classification and alterations in MRI-based ISI of the spinal cord reflected the postoperative symptom severity and surgical outcomes in patients with SCI without major bone injury.

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Objectives: This study aimed to evaluate the anteroposterior diameters and cross-sectional areas of the dural sac and spinal cord in the thoracic spine, to elucidate the spinal cord occupation rate of the dural sac in these dynamic changes for each level using multidetector-row computed tomography (MDCT).

Patients And Methods: Fifty patients with cervical or lumbar spinal disease were prospectively enrolled. After preoperative myelography, MDCT was performed at maximum passive flexion and extension.

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Background: Postoperative SSI is a common and potentially serious complication in spine surgery. Seasonal variation occurs in rates of nosocomial infection, with higher rates found in the summer, during which hot, humid conditions may be optimal for proliferation of bacteria. This might also influence the rate of SSI.

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Purpose: To identify age-related changes and the relationship between upper and lower cervical sagittal alignment and the range of motion (ROM).

Methods: A total of 600 asymptomatic volunteers were enrolled. There were 50 males and 50 females in each decade of life between the third and the eighth.

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Although a majority of spinal cord herniation reportedly occurs idiopathically, postoperative iatrogenic spinal cord herniation is rare. Therefore, the incidence rate, pathogenic mechanism, and clinical outcomes are not clear. We present three cases of postoperative iatrogenic spinal cord herniation and present a literature review.

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Study Design: A multicenter retrospective analysis of a prospectively maintained database.

Objective: To examine the characteristics of reoperation for surgical site infection (SSI) after spinal instrumentation surgery, including the efficacy of treatment for SSI and instrumentation retention.

Summary Of Background Data: Aging of the population and advances in surgical techniques have increased the demand for spinal surgery in elderly patients.

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Study Design: A prospective cohort study.

Objective: This study aimed to investigate the relationship between preoperative cervical sagittal alignment and postoperative kyphosis in patients with cervical spondylotic myelopathy (CSM) and to determine the cut-off angle for predicting the postlaminoplasty kyphosis.

Summary Of Background Data: There have been several reports describing a cervical kyphosis after laminoplasty.

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Study Design: Retrospective study.

Objective: The purpose of the study was to examine survival after surgery for a metastatic spinal tumor using prognostic factors in the new Katagiri score.

Summary Of Background Data: Surgery for spinal metastasis can improve quality of life and facilitate treatment of the primary cancer.

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The purpose of this study was to investigate the effectiveness of early (<72 h) versus late (≥72 h) decompression surgery after the onset of drop foot caused by root disorder in lumbar degenerative diseases (LDDs). Data were included from 60 patients who underwent decompression surgery for drop foot caused by LDDs, including lumbar disk herniation or lumbar spinal stenosis. The primary outcome was ordinal change in the manual muscle test (MMT) at 2 years follow-up.

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Background: The number of long-term survivors after allogeneic hematopoietic stem cell transplantation (HSCT) has increased recently. Esophageal squamous cell carcinoma occurs at a particularly high incidence as a secondary cancer after HSCT. However, standard treatment for these patients has not been established yet.

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