Endoscopic Anatomy Along the Transnasal Approach to the Pituitary Gland and the Surrounding Structures

Author(s):  
M. Tschabitscher ◽  
R. J. Galzio
1987 ◽  
Vol 66 (1) ◽  
pp. 140-142 ◽  
Author(s):  
Huw B. Griffith ◽  
Richard Veerapen

✓ The transsphenoidal route to the pituitary gland is well established in neurosurgical practice, and several approaches to the sphenoidal air sinus have been described. In this paper, the authors describe a technique that utilizes a direct route through the nasal cavity, thereby minimizing disruption of normal tissues.


2010 ◽  
Vol 67 (3) ◽  
pp. ons1-ons8 ◽  
Author(s):  
Iacopo Dallan ◽  
Maurizio Bignami ◽  
Paolo Battaglia ◽  
Paolo Castelnuovo ◽  
Manfred Tschabitscher

Abstract BACKGROUND AND IMPORTANCE: To describe a transnasal endoscopic route to the jugular foramen and the endoscopic anatomy of the infratemporal fossa. CLINICAL PRESENTATION: Endoscopic transnasal dissection of the infratemporal fossa was performed in 3 injected fresh heads (1 head only in arteries and 2 heads in arteries and veins). Two other double-injected specimens were dissected externally (2 of them side laterally and 1 anteriorly) to compare the different views and better understand the 3-dimensionality of the region. Detailed endoscopic anatomy of the infratemporal fossa was clearly observed. The realization of a septal and posterior maxillary window allows surgeons to gain space to the jugular foramen. The ability to manage the vessels, especially the veins, and identify the muscles is mandatory. The fundamental role of the vidian canal in targeting the anterior genu of the internal carotid artery is confirmed. The role of the maxillary and mandibular branches of the trigeminal nerve and the eustachian tube in this kind of approach is critical. CONCLUSION: A fully transnasal endoscopic route to the jugular foramen is feasible. The most important landmark for this kind of approach is the eustachian tube.


2021 ◽  
Vol 49 (1, 2, 3) ◽  
pp. 14
Author(s):  
Mirza Pojskić ◽  
Alisa Arnautovic ◽  
Marko Kovacevic ◽  
Neal S. Beckford ◽  
Mohammad N. Qureshi ◽  
...  

<p><strong>Objective. </strong>To describe the technical nuances of multimodal transseptal-transsphenoid surgery for pituitary tumors using a combination of microneurosurgery, neuroendoscopy, and electromagnetic neuronavigation.</p><p><strong>Materials and Methods. </strong>A transnasal approach to the sella is performed endoscopically and widely exposed by an otolaryngologic surgeon. Surgery is next performed by the neurosurgeon with microscope and  neuronavigation for microsurgical resection of pituitary tumors. Neuroendoscope is also used at the end of surgery to confirm tumor resection and inspect operative site. During surgery, the patient’s head, angle and height of the microscope, and position of the table are repositionable to allow for multiple angle views. Abdominal fat harvested prior to the procedure is used to ensure cerebrospinal fluid seal.</p><p><strong>Results. </strong>The senior author (KIA) has used the combined approach with 84 consecutive patients. Radical resection was achieved in 66 patients, subtotal in 11, and partial in 7. There were no perioperative complications. Six patients experienced postoperative transient diabetes insipidus. The pituitary gland and stalk were preserved in all cases. Visual symptoms were improved in 78% and endocrinological symptoms in 56% of cases.</p><p><strong>Conclusion. </strong>This combined approach is safe and effective. It increases the efficacy and radicality of surgical resection, helps to preserve the pituitary gland, and improves and resolves preoperatively altered patient hormonal function and impaired vision. It also reduces complications, provides less postoperative pain and discomfort, reduces the surgery time, and enables a shorter hospital-stay.</p>


2020 ◽  
Vol 22 (1) ◽  
pp. 39-48
Author(s):  
O. V. Ivashchenko ◽  
A. Yu. Grigoriev ◽  
V. N. Azizyan ◽  
E. Yu. Nadezhdina ◽  
O. Yu. Rebrova ◽  
...  

The study objective is to compare pre- and intraoperative characteristics, and the results of neurosurgical treatment in patients with Cushing’s disease, non-visualized adenoma and microadenoma of the pituitary gland.Materials and methods. The results of transsphenoidal adenomectomy were analyzed in 102 patients with non-visualized corticotropinomas and 360 patients with microcorticotropinomas. The pituitary genesis of endogenous ACTH-dependent hypercorticism in 182 patients was proved by the results of selective blood sampling from inferior petrosal sinus with stimulation desmopressin. The study included 369 women and 93 men aged 16 to 64 years. All patients were operated by transnasal approach using endoscopic techniques.Results. The group with non-visualized adenoma was dominated by men (p = 0.005) and patients with severe hypercorticism (p = 0.021). When comparing intraoperative characteristics in this group, invasive growth was statistically significantly more frequent (53 % vs 39 %) (p = 0.017), which in turn led to more aggressive intraoperative tactics (p <0.001) and more frequent development of hypothyroidism (11 % vs 4 %) (p = 0.028) in the early postoperative period. Early postoperative remission occurred in 73 (72 %) of 102 patients with non-visualized adenoma and in 314 (87 %) of 360 patients with microadenoma (p <0.001).Conclusion. Early results of primary transsphenoidal adenomectomy in patients with non-visualized pituitary adenoma were significantly worse in comparison with patients with microadenoma detected by 1.5 T magnetic resonance imaging, which have more frequently invasive growth, what leads to an increase in the volume of surgery and a possible increase in postoperative hypopituitarism.


Author(s):  
Morten H. Nielsen ◽  
Lone Bastholm

During the last 5 years the diameter of the gold probes used for immuno-cytochemical staining at the electron microscopical (EM) level has been decreased. The advantage of small diameter gold probes is an overall increased labelling density. The disadvantage is a lower detectability due to the low electron density of smaller gold particles consequently an inconvenient high primary magnification needed for EM examination. Since 1 nm gold particles are barely visible by conventional EM examination the need for enlargement by silverenhancement of the gold particles has increased.In the present study of ultrathin cryosectioned material the results of immunostaining using 5 nm gold conjugated antibody and 1 nm gold conjugated antibodies are compared after silverenhancement of the 1 nm gold particles.Slices of freshly isolated mouse pituitary gland were immersion fixed for 20 min in 2 % glutaraldehyde /2 % paraformaldehyde. Blocks cryoprotected with 2.3 M sucrose were frozen in liquid nitrogen and ultra-cryosectioned on a RMC cryoultra-microtome.


2014 ◽  
Vol 75 (S 01) ◽  
Author(s):  
Victor Morera Porras ◽  
Gelareh Zadeh ◽  
Fred Gentili ◽  
Juan Fernandez-Miranda

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