Prognostic Factors after Surgical Treatment for Spinal Metastases.

Study Design: A retrospective multicenter case series was conducted.

Purpose: This study aimed to investigate survival and prognostic factors after surgery for a metastatic spinal tumor.

Overview Of Literature: Prognostic factors after spinal metastasis surgery remain controversial.

Recurrence rate after posterior percutaneous screw fixation without anterior debridement for pyogenic spondylitis compared with conservative treatment: a propensity score-matched analysis.

Purpose: Previous studies have shown that percutaneous pedicle screw (PPS) posterior fixation without anterior debridement for pyogenic spondylitis can improve patient quality of life compared with conservative treatment. However, data on the risk of recurrence after PPS posterior fixation compared with conservative treatment is lacking. The aim of this study was to compare the recurrence rate of pyogenic spondylitis after PPS posterior fixation without anterior debridement and conservative treatment.

Acute non-traumatic spinal subarachnoid hematomas: A report of five cases and a systematic review of literature.

Background: There is a lack of evidence on spinal subarachnoid hematomas because of the rarity of their spontaneous development and difficulty in diagnosis. The aim of this study was to identify the characteristics and outcomes of surgically confirmed acute non-traumatic spinal subarachnoid hematomas from a multicenter surgical database and conduct a systematic review of existing literature.

Methods: Five surgically confirmed cases of acute non-traumatic spinal subarachnoid hematomas were identified from our multicenter database with 22 cases from a systematic review of existing literature.

Neurological severity evaluation using magnetic resonance imaging in acute spontaneous spinal epidural haematomas.

Purpose: This study aimed to elucidate the severity of neurological deficits in a large series of patients with acute spontaneous spinal epidural haematoma (SSEH) using magnetic resonance imaging (MRI).

Methods: We included 57 patients treated for acute SSEH at 11 institutions and retrospectively analysed their demographic and MRI data upon admission. We investigated MRI findings, such as the haematoma length and canal occupation ratio (COR).

Bone-femoral component interface gap after sagittal mechanical axis alignment is filled with new bone after cementless total knee arthroplasty.

Purpose: This study retrospectively evaluated the fate of mismatch between an uncemented femoral component and each femoral cut surface (i.e., wedge-shaped gap) relative to sagittal mechanical alignment in total knee arthroplasty (TKA).

Is a "sulcus cut" technique effective for determining the level of distal femoral resection in total knee arthroplasty?

Purpose: Determining the level of distal femoral resection is crucial when performing total knee arthroplasty (TKA). However, variations in distal femoral resection are encountered unexpectedly. A "sulcus cut" technique is sometimes used to determine the level of distal femoral resection, but its effectiveness has not been evaluated.

Tibial rotational alignment was significantly improved by use of a CT-navigated control device in total knee arthroplasty.

This study compared the accuracy of three methods to set tibial component rotational alignment: (1) conventional method, the anteroposterior (AP) axis was determined by the surgeon using anatomical landmarks; (2) partial-navigation method, the tibia was prepared according to the AP axis using a CT-based navigation system and the component was manually positioned; (3) full-navigation method, the tibial component was positioned and fixed with cement under the control of navigation using a newly developed instrument. The conventional method showed considerable deviation (range, -18.6° to 14.