Metastatic prostate cancer in ossification of the ligamentum flavum--a case report.

Background Context: No previous reports have described a metastatic tumor located in the ossification of the ligamentum flavum (OLF).

Purpose: To report an extremely rare case of metastatic tumor located in the OLF.

Study Design: Case report.

Comparison of enlargement of the spinal canal after cervical laminoplasty: open-door type and double-door type.

The purpose of this study was to compare the degree of enlargement of the spinal canal between two methods of cervical laminoplasty (open-door laminoplasty and double-door laminoplasty) and to determine their appropriate surgical indications based on the results. Tension-band laminoplasty (TBL, one method of open-door type) was performed in 33 patients and double-door laminoplasty (DDL) in 20 patients. The operation level ranged from C2 to C7 in all patients.

Occipitocervical fusion using a hook and rod system between cervical levels C2 and C3.

We aimed to evaluate the clinical utility and safety of the hook and rod method for occipitocervical fusion. Eleven consecutive patients (3 males, 8 females; 50-78 years old, average 63.8 years; 16-77 months follow-up, average 33.

Posterior atlantoaxial subluxation due to os odontoideum combined with cervical spondylotic myelopathy: a case report.

In patients with os odontoideum and posterior atlantoaxial subluxation are extremely rare. No reports have described posterior atlantoaxial subluxation associated with os odontoideum combined with cervical spondylotic canal stenosis, both of which require surgical treatment. We report one case of a 75-year-old female who underwent arthrodesis between the occiput and C3 using a hook-and-rod system and also a double-door laminoplasty from levels C3 to C7.

Retrospective cohort study between selective and standard C3-7 laminoplasty. Minimum 2-year follow-up study.

A total of 64 patients with cervical spondylotic myelopathy (CSM) were assessed in this study. Forty-two patients underwent selective expansive open-door laminoplasty (ELAP). Twenty-two patients who underwent conventional C3-7 ELAP served as controls.

Severe kyphoscoliosis associated with osteomalacia.

Background Context: Kyphoscoliosis is one of the most frequent complications of osteomalacia, which only rarely results in severe deformity requiring surgery. To the best of our knowledge, there has been only one previous report of a spinal deformity as a complication of osteomalacia that was sufficiently severe so as to require surgical treatment.

Purpose: To report here the case of a 27-year-old woman who experienced back pain of gradual onset accompanied by progressive scoliosis resulting in severe dyspnea.

Postoperative change of the cross-sectional area of back musculature after 5 surgical procedures as assessed by magnetic resonance imaging.

Many investigators have reported that persistent low back pain may occur after posterior surgical intervention, and studies have investigated the histologic and histochemical changes in back muscle after posterior lumbar spine surgery. The purpose of the current study is to compare the pre- and postoperative cross-sectional area of the back musculature among 5 surgical groups including anterior lumbar interbody fusion, which has no direct invasion of the back musculature, using magnetic resonance imaging, and to correlate the clinical results with the degree of atrophy. The cross-sectional area of the back musculature was measured before and after surgery in T2-weighted axial magnetic resonance images using a computer-linked digitizer.

Diagnostic efficacy of thin slice CT in osteoid osteoma of the thoracic spine: report of two cases.

We present a 24-year-old man and a 31-year-old woman who complained of persistent back pain with osteoid osteoma of the thoracic spine. Computed tomography (CT) revealed a round sclerotic lesion in the posterior element of the thoracic spine, although their plain radiographs showed no abnormalities except a slight scoliosis. The patients underwent total excision of the tumor via a posterior approach.

Posterior lumbar interbody fusion using dense hydroxyapatite blocks and autogenous iliac bone: clinical and radiographic examinations.

Posterior lumbar interbody fusion (PLIF) is a standard surgical technique for the lumbar degenerative diseases. However, some problems such as collapse or retropulsion of the grafted bone and pseudoarthrosis have been reported when autogenous or cadaveric bone is used. Two iliac bone blocks with one-side cortex and one dense hydroxyapatite (HA) block were grafted together into the interbody space as in a sandwich.

Anterior lumbar interbody fusion: changes in area of the dural tube, disc height, and prevalence of cauda equina adhesion in magnetic resonance images.

Objective: Many investigators have reported satisfactory outcome in anterior lumbar interbody fusion (ALIF) performed for lumbar disc herniation or "multiply operated back" (MOB), but without comparing preoperative and postoperative dural tube area and cauda equina adhesion in magnetic resonance imaging (MRI). We conducted this study to determine these data in ALIF performed for lumbar disc herniation and MOB.

Methods: Thirty-two patients who underwent ALIF, involving 38 discs, were studied.

Primary repair of the collateral ligament of the proximal interphalangeal joint using a suture anchor.

Ten out of 12 complete ruptures of the collateral ligament of the proximal interphalangeal joint were repaired primarily using a suture anchor. Active finger exercise was started gently by taping the injured finger to adjacent one one week postoperatively. All patients returned to their original occupation or sports activities within seven weeks of operation.

Posttraumatic volar tendon subluxation out of the first extensor compartment: a case report.

Symptomatic volar subluxation of the abductor pollicis longus and the extensor pollicis brevis tendons developed in a 29-year-old man after a sprain that occurred with the wrist in flexion and ulnar deviation. The extensor retinaculum, which forms the extensor compartment, was partially avulsed from its insertion on the radius. Palmar abduction and extension of the thumb with the wrist flexed produced subluxation of the tendons over the volar side of the radius ridge where the retinaculum forming the first extensor compartment attached.