Diurnally fluctuating frontal dysequilibrium secondary to a pineal pilocytic astrocytoma: is this symptom associated with a check-valve mechanism in a pineal region tumor?

2008 ◽  
Vol 25 (3) ◽  
pp. 367-371 ◽  
Author(s):  
Tae-Won Kim ◽  
Tae-Kyu Lee ◽  
Bum-Soo Kim ◽  
Kwang-Soo Lee ◽  
In-Uk Song ◽  
...  
Keyword(s):  
Pilocytic Astrocytoma ◽  
Check Valve ◽  
Pineal Region ◽  
Valve Mechanism ◽  
Pineal Region Tumor

Giant bulla formation in the lung because of a check-valve mechanism

2017 ◽  
Vol 55 (1) ◽  
pp. 63-68 ◽  
Author(s):  
Aya Hirata ◽  
Takeshi Saraya ◽  
Nobuaki Arai ◽  
Shin Karita ◽  
Riken Kawachi ◽  
...  
Keyword(s):  
Check Valve ◽  
Valve Mechanism ◽  
Giant Bulla

scholarly journals Interhemispheric transcallosal intervenous approach to a pineal region tumor

2021 ◽  
Vol 5 (1) ◽  
pp. V11
Author(s):  
Daniel A. Donoho ◽  
Guillermo Aldave
Keyword(s):  
Extent Of Resection ◽  
Pineal Region ◽  
Cerebral Veins ◽  
Surgical Morbidity ◽  
Pineal Tumors ◽  
Pineal Region Tumor ◽  
Pineal Region Tumors ◽  
Transcallosal Approach ◽  
Formidable Challenge ◽  
The Right

Pineal region tumors represent a formidable challenge to the neurosurgeon. Choosing the right approach is key to optimizing the extent of resection and minimizing surgical morbidity. In this video, the authors show an interhemispheric transcallosal approach to a pineal region tumor in a 15-year-old boy. The advantage of this corridor over posterior approaches is that it provides a nice view of the tumor plane with the venous complex, especially while dissecting tumor from the anterior aspect of the internal cerebral veins on their vertical path. Thus, this approach represents a safe and effective alternative for selected pineal tumors. The video can be found here: https://stream.cadmore.media/r10.3171/2021.4.FOCVID2120.

Check-valve Mechanism as a Cause of Bilateral Spontaneous Pneumothorax Complicating Bronchioloalveolar Cell Carcinoma

CHEST Journal ◽  
1991 ◽  
Vol 100 (3) ◽  
pp. 853-855 ◽  
Author(s):  
Hironobu Minami ◽  
Shuzo Sakai ◽  
Atsushi Watanabe ◽  
Kaoru Shimokata
Keyword(s):  
Cell Carcinoma ◽  
Spontaneous Pneumothorax ◽  
Check Valve ◽  
Valve Mechanism ◽  
Bronchioloalveolar Cell Carcinoma

scholarly journals Papillary tumor of the pineal region in a 15-month-old boy

2011 ◽  
Vol 7 (5) ◽  
pp. 534-538 ◽  
Author(s):  
Jessica Li ◽  
Pablo F. Recinos ◽  
Brent A. Orr ◽  
Peter C. Burger ◽  
George I. Jallo ◽  
...  
Keyword(s):  
Pediatric Population ◽  
Proton Beam Therapy ◽  
Pineal Region ◽  
Biological Behavior ◽  
Imaging Diagnosis ◽  
Papillary Tumor ◽  
Distinct Entity ◽  
Pineal Region Tumor ◽  
Appropriate Treatment

The papillary tumor of the pineal region (PTPR) is a distinct entity that is particularly rare in the pediatric population. The authors document the youngest reported patient with this clinicopathological entity to date. A case of PTPR in a 15-month-old boy is described. Initially thought to be a tectal glioma, the tumor was later identified as a pineal region tumor after demonstrating growth on routine imaging. Diagnosis of PTPR was established by histopathological evaluation of biopsy samples, which revealed papillary, cystic, and solid tumor components. The patient's postoperative course was complicated by tumor growth despite several debulking procedures and chemotherapy, as well as persistent hydrocephalus requiring 2 endoscopic third ventriculostomies and eventual ventriculoperitoneal shunt placement. After a 15-month follow-up period, the patient has received proton-beam therapy and has a stable tumor size. The PTPR is a recently described tumor of the CNS that must be included in the differential diagnosis of pineal region masses. The biological behavior, prognosis, and appropriate treatment of PTPR have yet to be fully defined.

Gamma Knife Radiosurgery in the Treatment of Pineal Region Tumor

1999 ◽  
pp. 227-231
Author(s):  
L. Junchao ◽  
W. Hongxun ◽  
X. Xin ◽  
L. Lin ◽  
Q. Ziheng ◽  
...  
Keyword(s):  
Gamma Knife ◽  
Gamma Knife Radiosurgery ◽  
Pineal Region ◽  
Pineal Region Tumor

Neuroendoscopy in pineal region tumor with obstructive hydrocephalus

2000 ◽  
Vol 4 (4) ◽  
pp. 154-158 ◽  
Author(s):  
Danny Tat-Ming Chan ( ) ◽  
Joseph Ming-Kuen Lam ( ) ◽  
Wai-Sang Poon ( )
Keyword(s):  
Obstructive Hydrocephalus ◽  
Pineal Region ◽  
Pineal Region Tumor

Pulmonary Rhabdomyosarcoma Associated with Check-Valve Mechanism

2017 ◽  
Vol 196 (3) ◽  
pp. e7-e9
Author(s):  
Udit Chaddha ◽  
Jeffrey A. Hagen ◽  
Bassam Yaghmour
Keyword(s):  
Check Valve ◽  
Valve Mechanism

Three-Dimensional Simulation of Collision-Free Paths for Combined Endoscopic Third Ventriculostomy and Pineal Region Tumor Biopsy: Implications for the Design Specifications of Future Flexible Endoscopic Instruments

2015 ◽  
Vol 12 (3) ◽  
pp. 231-238 ◽  
Author(s):  
Kyle W Eastwood ◽  
Vivek P Bodani ◽  
James M Drake
Keyword(s):  
Software Package ◽  
Endoscopic Third Ventriculostomy ◽  
Third Ventricle ◽  
Three Dimensional ◽  
Pineal Region ◽  
Third Ventriculostomy ◽  
Tumor Biopsy ◽  
Foramen Of Monro ◽  
Tumor Margin ◽  
Pineal Region Tumor

Abstract BACKGROUND Recent innovations to expand the scope of intraventricular neuroendoscopy have focused on transitioning multiple-incision procedures into single-corridor approaches. However, the successful adoption of these combined procedures requires minimizing the unwanted torques applied to surrounding healthy structures. OBJECTIVE To define the geometry of relevant anatomical structures in endoscopic third ventriculostomy (ETV) and pineal region tumor biopsy (ETB). Second, to determine the optimal instrument shaft path required for collision-free single burr hole combined ETV/ETB. METHODS Magnetic resonance and computed tomography data from 15 pediatric patients who underwent both ETV and ETB procedures between 2006 and 2014 was segmented by using the 3DSlicer software package to create virtual 3-D patient models. Anatomical regions of interest were measured including the foramen of Monro, the massa intermedia, the floor of the third ventricle, and the tumor margin. Utilizing the MATLAB software package, virtual dexterous instruments were inserted into the models and optimal dimensions were calculated. RESULTS The diameters of the foramen of Monro, massa intermedia (anterior-posterior, superior-inferior), anterior third ventricle, and tumor margin are 6.85, 4.01, 5.05, 14.2, and 28.5 mm, respectively. The average optimal burr placement was determined to be 22.5 mm anterior to the coronal and 30 mm lateral to the sagittal sutures. Optimal flexible instrument geometries for novel instruments were calculated. CONCLUSION We have established a platform for estimating the shape of novel curved dexterous instruments for collision-free targeting of multiple intraventricular points, which is both patient and tool specific and can be integrated with image guidance. These data will aid in developing novel dexterous instruments.

scholarly journals Lateral supracerebellar infratentorial approach for microsurgical resection of large midline pineal region tumors: techniques to expand the operative corridor

2016 ◽  
Vol 124 (1) ◽  
pp. 269-276 ◽  
Author(s):  
Charles Kulwin ◽  
Ken Matsushima ◽  
Mahdi Malekpour ◽  
Aaron A. Cohen-Gadol
Keyword(s):  
Transverse Sinus ◽  
Lateral Approach ◽  
Pineal Region ◽  
Related Complication ◽  
Total Resection ◽  
Pineal Region Tumor ◽  
Pineal Region Tumors ◽  
Suboccipital Craniotomy ◽  
Bridging Veins ◽  
Supracerebellar Infratentorial Approach

Pineal region tumors pose certain challenges in regard to their resection: a deep surgical field, associated critical surrounding neurovascular structures, and narrow operative working corridor due to obstruction by the apex of the culmen. The authors describe a lateral supracerebellar infratentorial approach that was successfully used in the treatment of 10 large (> 3 cm) midline pineal region tumors. The patients were placed in a modified lateral decubitus position. A small lateral suboccipital craniotomy exposed the transverse sinus. Tentorial retraction sutures were used to gently rotate and elevate the transverse sinus to expand the lateral supracerebellar operative corridor. This approach placed only unilateral normal structures at risk and minimized vermian venous sacrifice. The surgeon achieved generous exposure of the caudal midline mesencephalon through a “cross-court” oblique trajectory, while avoiding excessive retraction on the culmen. All patients underwent the lateral approach with no approach-related complication. The final pathological diagnoses were consistent with meningioma in 3 cases, pilocytic astrocytoma in 3 cases, intermediate grade pineal region tumor in 2 cases, and pineoblastoma in 2 cases. The entire extent of these tumors was readily reachable through the lateral supracerebellar route. Gross-total resection was achieved in 8 (80%) of the 10 cases; in 2 cases (20%) near-total resection was performed due to adherence of these tumors to deep diencephalic veins. Large midline pineal region tumors can be removed through a unilateral paramedian suboccipital craniotomy. This approach is simple, may spare some of the midline vermian bridging veins, and may be potentially less invasive and more efficient.

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