Notes

3D-bioprinted BMSC-laden biomimetic multiphasic scaffolds pertaining to efficient restore associated with osteochondral problems in the osteoarthritic rat design.
The technique of occipitofrontal switch for correction of anterior plagiocephaly is an elegant procedure with good functional and aesthetic outcome.
The technique of occipitofrontal switch for correction of anterior plagiocephaly is an elegant procedure with good functional and aesthetic outcome.
Persistent primitive olfactory artery (PPOA) is a rare anomaly of the anterior cerebral artery. We experienced a rare case of subarachnoid hemorrhage caused by a ruptured saccular aneurysm of PPOA.

A 72-year-old man was transported to our hospital with sudden headache. Ferrostatin-1 concentration On examination, World Federation of Neurological Surgeons scale was Grade I, and computed tomography of the head showed subarachnoid hemorrhage in Fisher Group 3. Cerebral angiography showed left PPOA and a 4-mm saccular aneurysm at the hairpin turn. No other abnormalities causing bleeding were observed. Based on these findings, subarachnoid hemorrhage due to a ruptured PPOA aneurysm was diagnosed. As the patient had a ventilatory defect due to emphysema, direct approach to the lesion would have been difficult and an endovascular surgery was performed. Three coils were inserted into the aneurysm, and complete occlusion was achieved. Cerebral vasospasm was not observed, and the patient was discharged 1 month after surgery without any neurologic deficit.

Most aneurysms of the PPOA are formed at the hairpin turn, as observed in our patient; therefore, a hemodynamic mechanism may be involved in the etiology. To the best of our knowledge, there is no report on treatment using intra-aneurysmal coil embolization, indicating that ours was the first case. As the long-term outcome of intra-aneurysmal coil embolization for PPOA aneurysm is unknown, careful follow-up will be necessary in the future.
Most aneurysms of the PPOA are formed at the hairpin turn, as observed in our patient; therefore, a hemodynamic mechanism may be involved in the etiology. To the best of our knowledge, there is no report on treatment using intra-aneurysmal coil embolization, indicating that ours was the first case. As the long-term outcome of intra-aneurysmal coil embolization for PPOA aneurysm is unknown, careful follow-up will be necessary in the future.
Bipolar electrocautery systems used during neurosurgical procedures have been shown to induce thermal injury to surrounding tissue. The goal of this study was to compare the thermal injury induced by two different systems commonly used in neurosurgical procedures (Silverglide by Stryker Corporation and SpetzlerMalis by Codman Neuro), with that of a newly introduced device (TRIOwand by NICO Corporation).

A farm swine underwent craniectomy and durotomy with subsequent exposure of cortical brain tissue. Electrocoagulation for the duration of 3 s was conducted with three different bipolar systems under comparable power settings. The maximal depth of thermal injury and mean area of injury in Hematoxylin and Eosin stained slides were quantified using Image J. The tissues were evaluated for vacuolization and ischemic damage. One-way ANOVA followed by
Tukey test was utilized for statistical analysis. Alpha level was set at 0.05.

TRIOwand lesions showed less depth of injury when compared to both Spetzler-Maliize the injury caused by different bipolar systems with other settings and under surgical conditions in humans.
Intradural extramedullary spinal cord tumors (IESCT) account for approximately two-thirds of largely benign intraspinal neoplasms. They occasionally present with acute neurological deterioration warranting emergent surgical intervention.

Here, we reviewed a series of 31 patients with intradural extramedullary spinal tumors who underwent surgery from 2012 to 2019. Patients averaged 50.8 years of age, and there were 16 males and 15 females. Patients were followed for a minimum of 1 year. Multiple clinical outcome variables were studied (e.g., Karnofsky Performance Score [KPS], visual analog scale (VAS), and Frankel grade).

The majority of IESCT tumors were found in the thoracic spine 18 (58.06%) followed by the lumbar 8 (25.80%), cervical 1 (3.22%), and combined junctional tumors 4 (12.90%) (cervicothoracic-02 and thoracolumbar-02). Histopathological diagnoses included schwannomas-16 (51.61%), meningiomas-11 (35.48%), lipomas-2 (6.45%), hemangiomas-1 (3.22), and ependymomas-01 (03.22%). The VAS score was reduced in all cases, while KPS and Frankel grades were significantly improved. Complications included cerebrospinal fluid leakage, new/residual paresthesias, and tumor recurrence (12.50%).

Most intradural extramedullary tumors are benign and are readily diagnosed utilizing MRI scans. Notably, good functional outcomes follow surgical intervention.
Most intradural extramedullary tumors are benign and are readily diagnosed utilizing MRI scans. Notably, good functional outcomes follow surgical intervention.
Poorer outcomes for infratentorial tumor resection have been reported. There is a lack of large multicenter analyses describing infratentorial surgery outcomes in older patients. We characterized outcomes in patients aged ≥65 years undergoing infratentorial cranial surgery.

The National Surgical Quality Improvement Project database was queried from 2012 to 2018 for patients ≥18 years undergoing elective infratentorial cranial surgery for tumor resection. Patients were grouped into 65-74 years, ≥75 years, and 18-64 years cohorts. Multivariable regressions compared outcome measures.

Of 2212 patients, 28.3% were ≥65 years, of whom 24.8% were ≥75 years. Both older subpopulations had worse American Society of Anesthesiologists classification compared to controls (
< 0.01) and more comorbidities. Patients 65-74 and ≥75 years had higher rates of major complication (adjusted odds ratio [aOR] = 1.77, 95% CI = 1.13-2.79 and aOR = 3.44, 95% CI = 1.96-6.02, respectively), prolonged length of stay (LOS) (aOR = al surgery.
Neoplastic cerebral aneurysms related to metastatic processes are exceptionally rare and carry a dismal prognosis. Only four previous reports exist of neoplastic aneurysms secondary to metastatic adenocarcinoma, all of which were found to be lung cancer in origin. We present the fifth reported metastatic adenocarcinomatous cerebral aneurysm, and the first case is secondary to a non-lung cancer primary.

The patient presented with complaining of headache and was found to have a large right-sided intraparenchymal hemorrhage and smaller left-sided hemorrhage on head CT, and CTA revealed a vascular pouch in the region of the hemorrhage. The patient showed sudden neurologic decline, and repeat imaging revealed enlargement of the hematoma with significant brain compression. The patient underwent emergent angiography revealing a distal cortical middle cerebral artery aneurysm, suspicious for mycotic etiology, which was treated through microsurgical excision at the time of hematoma evacuation. The aneurysm specimen was sent for cultures and pathology, revealing the diagnosis of metastatic non-small-cell carcinoma. Further inpatient workup did not reveal the primary neoplastic source.

Although diagnostic workup should search for more common pathologic mimics than metastatic neoplastic cerebral aneurysms, clinicians must be able to recognize and expeditiously treat this devastating lesion. Further investigation and analysis of treatment options are necessary to better understand this rare pathology and improve patient outcomes.
Although diagnostic workup should search for more common pathologic mimics than metastatic neoplastic cerebral aneurysms, clinicians must be able to recognize and expeditiously treat this devastating lesion. Further investigation and analysis of treatment options are necessary to better understand this rare pathology and improve patient outcomes.
We have reviewed 75 cases plus our own single instance of spontaneous regression of herniated cervical discs.

We searched PubMed and EMBASE databases (until September 2020) utilizing the following keywords; "spontaneous regression," "herniated cervical disc," and "Magnetic Resonance Imaging (MRI) studies."

In the literature, we found 75 cases of herniated cervical discs which spontaneously regressed; to this, we added our case. Patients averaged 40.95 years of age. Discs were paracentral or foraminal in 84% of the cases, with most occurring at the C5-C6 (51%) and C6-C7 (36%) levels. Symptoms included neck pain/radiculopathy (91%) or myelopathy (9%). link2 The average interval between initial presentation and spontaneous regression of herniated discs on MRI was 9.15 months. Interestingly, on MRI, extruded/sequestrated discs were more likely to undergo spontaneous regression versus protruding discs.

Successive MRI studies documented the spontaneous regression of herniated cervical discs over an average of 9.15 months. Although this may prompt greater consideration for conservative treatment in younger patients without neurologic deficits, those with deficits should be considered for surgery.
Successive MRI studies documented the spontaneous regression of herniated cervical discs over an average of 9.15 months. Although this may prompt greater consideration for conservative treatment in younger patients without neurologic deficits, those with deficits should be considered for surgery.
Spinal osteoid osteomas (OOs) are common benign bone tumors that most frequently affect the posterior elements. They occasionally (e.g., 10% of the time) necessitate surgical resection for intractable pain. Given their small size and posterior positions, many may be amenable to minimally invasive surgical approaches.

We describe two cases of spinal OOs involving patients 11 and 17 years of age with lesions, respectively, at T7 and C4.

Minimally invasive approaches for resection of small bony spinal OOs are safe and technically achievable approaches.
Minimally invasive approaches for resection of small bony spinal OOs are safe and technically achievable approaches.
Pediatric spinal infections are rare and often accompanied by abscesses. Delayed diagnosis commonly leads to a poor neurological prognosis, emphasizing the need for early diagnosis and treatment.

We report on two cases of spinal infection; one in a 5-year-old boy with a T8-11 epidural abscess and one in a 10-year-old boy with an L5-S1 epidural abscess. Both cases improved with conservative therapy.

Early magnetic resonance imaging diagnosis and systemic treatment in collaboration with pediatricians are key factors in the successful management of children with spinal infections.
Early magnetic resonance imaging diagnosis and systemic treatment in collaboration with pediatricians are key factors in the successful management of children with spinal infections.
Pyogenic spondylodiscitis (PS) is a rare infection involving the intervertebral disk space, adjacent vertebral endplates, and vertebral bodies. PS occurs in the elderly and immunocompromised patients, and is an uncommon cause of initial and/or postoperative PS. There are only seven cases involving this organism reported in literature.

Here, we present a 35-year-old male who following a lumbar discectomy developed a postoperative iatrogenic PS uniquely attributed to
. The patient was successfully managed with postoperative surgical debridement and antibiotic therapy.

Rarely,
may be the offending organism resulting in a postoperative lumbar PS.
Rarely, B. link3 cepacia may be the offending organism resulting in a postoperative lumbar PS.
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