Morphometric analysis of the sella turcica in Northeastern Brazil

Introduction: The sella turcica is a structure of the median region of the sphenoid bone. Variations in its morphology are relevant as it is a region subjected to several surgical procedures, mainly related to the pituitary gland. Objective: To analyze the morphology of the sella turcica and its sexual dimorphism in Northeastern Brazil. Methods: Fifteen human skulls from the Federal University of Paraíba (UFPB) were used. The qualitative analysis was performed by classifying the shape of the sella turcica into three types: U, J and flattened. Morphometric data was collected and statistically analyzed to evaluate the relationship between sella morphometry and gender, and between sella and skull measurements. Values of p< 0.05) in the sella turcica length (STL) and skull length (SL), with male skulls being larger in both cases. The other linear measurements didn’t show differences between the sexes (p>0.05). There was a positive linear correlation between STL and SL, and a negative linear correlation between sella turcica width (STW) and sella turcica height (STH) and between STH and bitemporal width (BTW). Conclusion: The results point to important differences in the morphometric parameters evaluated with original findings for this population. Knowledge of the morphology of the sella is essential to plan safer surgical approaches in the pituitary gland or related anatomical structures.

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Accuracy of linear measurements obtained from stitched cone beam computed tomography images versus direct skull measurements

F1000Research ◽

10.12688/f1000research.17751.2 ◽

2020 ◽

Vol 8 ◽

pp. 166 ◽

Cited By ~ 1

Author(s):

Doaa Ahmed Fouad Hamed ◽

Mostafa Mohamed El Dawlatly ◽

Sahar Hosny El Dessouky ◽

Reham Mohamed Hamdy

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Reference Points ◽

Cone Beam ◽

Linear Measurements ◽

Gutta Percha ◽

Computed Tomography Images ◽

Lateral Plane ◽

Skull Measurements ◽

Human Skulls

Background: To assess whether the linear measurements obtained from stitched cone beam computed tomography (CBCT) images were as accurate as the direct skull measurements. Methods: Nine dry human skulls were marked with gutta-percha at reference points to obtain Twenty-two linear measurements on each skull. Ten measurements in the cranio-caudal plane, two measurements in the antero-posterior plane, and ten measurements in the medio-lateral plane. CBCT linear measurements obtained using stitching software were measured and compared with direct skull measurements. Results: The absolute Dahlberg error between direct linear measurements and linear measurements on stitched CBCT images ranged from (0.07 mm to 0.41 mm). The relative Dahlberg error ranged from (0.2% to 1.8%). Moreover, Intra-class Correlation Coefficient (ICC) ranged from (0.97 to 1.0) indicating excellent agreement. Conclusion: Stitched CBCT linear measurements were highly comparable to the direct skull measurements using a digital caliper.

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Accuracy of linear measurements obtained from stitched cone beam computed tomography images versus direct skull measurements

F1000Research ◽

10.12688/f1000research.17751.1 ◽

2019 ◽

Vol 8 ◽

pp. 166

Author(s):

Doaa Ahmed Fouad Hamed ◽

Reham Mohamed Hamdy ◽

Sahar Hosny El Dessouky

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Reference Points ◽

Cone Beam ◽

Linear Measurements ◽

Gutta Percha ◽

Computed Tomography Images ◽

Lateral Plane ◽

Skull Measurements ◽

Human Skulls

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Non-metamict uranoan pyrochlore and uranpyrochlore from tuff near Ndale, Fort Portal area, Uganda

Mineralogical Magazine ◽

10.1180/minmag.1989.053.370.14 ◽

1989 ◽

Vol 53 (370) ◽

pp. 257-262 ◽

Cited By ~ 14

Author(s):

D. D. Hogarth ◽

J. E. T. Horne

Keyword(s):

Cell Size ◽

Linear Correlation ◽

Metamorphic Rocks ◽

Portal Area ◽

Geological Age ◽

Unit Cells ◽

Positive Linear Correlation ◽

Crystalline Nature ◽

Linear Correlations

AbstractA thin (100 m) cover of flat-lying, Recent, calcite-rich tuff at Ndale near Fort Portal, Uganda, unconformably overlies steeply dipping Precambrian metamorphic rocks. It is locally radioactive owing to uranium-rich pyrochlore minerals and lesser amounts of zircon, monazite, titanite, and an unidentified thorium phosphate. In one concentrate, four grains of uranpyrochlore and one grain of uranoan pyrochlore showed a positive linear correlation of Ti with U, and negative linear correlations of Ti with Na, F and Sr. Ta remained high and relatively constant [11 anal., ave. 14.5 (0.6)% Ta2O5]. In the same concentrate the composition of a separate grain of uranoan pyrochlore did not plot on these lines and Ta was comparatively low [2 anal., ave. 4.5 (0.3)% Ta2O5]. The data suggest two separate paths of differentiation. However, zoned grains were not observed. Unit cells were cubic with a = 10.351 ± 0.002 Å for a grain with 12.9% UO2tot and 10.333 ± 0.002 Å for a grain with 26.6% UO2tot. On heating in air the cell size decreased, possibly due to oxidation of U4+. The crystalline nature of these minerals can be attributed to a very young (4000–5000 yr) geological age.

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Metastases to the pituitary gland

Neurosurgical FOCUS ◽

10.3171/foc.2004.16.4.9 ◽

2004 ◽

Vol 16 (4) ◽

pp. 1-4 ◽

Cited By ~ 73

Author(s):

Daniel R. Fassett ◽

William T. Couldwell

Keyword(s):

Pituitary Gland ◽

Diabetes Insipidus ◽

Skull Base ◽

Survival Rates ◽

Tumor Resection ◽

Sella Turcica ◽

Pituitary Tumors ◽

Visual Field Defects ◽

Malignant Neoplasms ◽

Pituitary Metastases

Only 1% of all pituitary surgeries are performed to treat tumors that have metastasized to the pituitary gland; however, in certain cases of malignant neoplasms pituitary metastases do occur. Breast and lung cancers are the most common diseases that metastasize to the pituitary. Breast cancer metastasizes to the pituitary especially frequently, with reported rates ranging between 6 and 8% of cases. Most pituitary metastases are asymptomatic, with only 7% reported to be symptomatic. Diabetes insipidus, anterior pituitary dysfunction, visual field defects, headache/pain, and ophthalmoplegia are the most commonly reported symptoms. Diabetes insipidus is especially common in this population, occurring in between 29 and 71% of patients who experience symptoms. Differentiation of pituitary metastasis from other pituitary tumors based on neuroimaging alone can be difficult, although certain features, such as thickening of the pituitary stalk, invasion of the cavernous sinus, and sclerosis of the surrounding sella turcica, can indicate metastasis to the pituitary gland. Overall, neurohypophysial involvement seems to be most prevalent, but breast metastases appear to have an affinity for the adenohypophysis. Differentiating metastasis to the pituitary gland from bone metastasis to the skull base, which invades the sella turcica, can also be difficult. In metastasis to the pituitary gland, surrounding sclerosis in the sella turcica is usually minimal compared with metastasis to the skull base. Treatment for these tumors is often multimodal and includes surgery, radiation therapy, and chemotherapy. Tumor invasiveness can make resection difficult. Although surgical series have not shown any significant survival benefits given by tumor resection, the patient's quality of life may be improved. Survival among these patients is poor with mean survival rates reported to range between 6 and 22 months.

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The Endocrine System: Pituitary Gland

10.2310/im.2275 ◽

2017 ◽

Author(s):

Omer Doron ◽

Jose E Cohen ◽

Iddo Paldor

Keyword(s):

Pituitary Gland ◽

Human Body ◽

Sella Turcica ◽

Endocrine System ◽

Portal System ◽

Balance Growth ◽

Sexual Drive ◽

Pituitary Dysfunction ◽

Physiologic Function ◽

And Function

The pituitary gland is the main point where the neural and endocrine systems function in continuity, maintaining homeostasis of many functional elements of the human body. Located inside the sella turcica, it is separated from the rest of the central nervous system (CNS); however, it plays a crucial part in the regulation of the fundamental endocrine profile, inhibiting or promoting CNS signaling to the rest of the human body. Made up of two distinct tissue subtypes, this gland is fed by a complex vascular network, which enables communication beyond the blood-brain barrier. Lying in close proximity to both important neural and vascular structure, changes in gland size and function result in significant clinical impact. The pituitary gland controls many processes, among which are thermoregulation; metabolism and metabolic rate; glucose, solute, and water balance; growth and development; blood pressure; and sexual drive, pregnancy, childbearing, birth, and breast-feeding. The devastating effects of pituitary dysfunction underscore the importance of the pituitary gland in maintenance of the various functions that underlie normal everyday human activity. This review covers the basic aspects of pituitary gland development, anatomy, and physiologic function. This review contains 3 figures, and 38 references, Key words: adenohypophysis, neurohypophysis, pituitary-hypothalamic axis, pituitary portal system, sella turcica

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Effect of Ultrasonic Treatment on Radon Exhalation from Porous Media: An Experimental Case Study

Sustainability ◽

10.3390/su10093005 ◽

2018 ◽

Vol 10 (9) ◽

pp. 3005

Author(s):

Ling-feng Xie ◽

Shu-liang Zou ◽

Xiang-yang Li ◽

Chang-shou Hong ◽

Hong Wang ◽

...

Keyword(s):

Porous Media ◽

Moisture Content ◽

Ultrasonic Wave ◽

Linear Correlation ◽

Experimental Results ◽

Radon Exhalation Rate ◽

Exhalation Rate ◽

Radon Exhalation ◽

Experimental Apparatus ◽

Positive Linear Correlation

Radon is internationally recognized as one of the seven seismic precursors. A self-assembly ultrasonic generator and experimental apparatus for radon measurement were utilized to explore the radon exhalation regularities of water-bearing porous media under different ultrasonic intensities. The experimental results showed that there was a coupling relationship among radon exhalation rate, moisture content, and ultrasonic frequency. With the increase of the frequency of the ultrasonic wave, its effect on the promotion of radon exhalation rate was found to be a more obviously positive linear correlation. The radon exhalation rate, which could climb to a maximum value of 0.179 Bq·m−2·s−1 in a naturally air-dried sample, increased at first and then decreased along with increased moisture content. Moreover, this study found that the ultrasonic wave had the most remarkable promoting effects on the radon exhalation rate of porous media with high moisture content, and there is a positive linear correlation between the growth rate of the radon exhalation rate and moisture content. The experimental results could provide a beneficial reference for the continual monitoring of radon in a seismically active belt and an explanation of radon anomalies; however, the proposed experimental model was simplified, so further insights are strictly required for a reliable correlation with the real monitoring of radon in a seismically active belt.

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The Nasal Gateway for Pituitary Surgery

American Journal of Rhinology ◽

10.2500/105065888781693005 ◽

1988 ◽

Vol 2 (4) ◽

pp. 193-200 ◽

Cited By ~ 1

Author(s):

Mary D. Lekas

Keyword(s):

Pituitary Gland ◽

Sella Turcica ◽

Pituitary Tumors ◽

Pituitary Surgery ◽

Transsphenoidal Approach ◽

External Rhinoplasty

There has been an evolution in the transseptal transsphenoidal approach for pituitary surgery. The nasal approach to the pituitary gland can be from the sublabial transseptal transsphenoidal; the transseptal transsphenoidal; the alotomy transseptal transsphenoidal; the external rhinoplasty transsphenoidal; the transnasal by mobilizing the whole nose on a pedicle; the transseptal infranasal; the midline columellar incision; all types of nasofacial incisions; and transethmoidal approach with nasal instrumentation. The transsphenoidal hypophysectomy surgery has become a safe and effective approach for pituitary tumors. We are mainly concerned with the transnasal and not the transethmoidal approach to the sella turcica at this time.

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A Relationship between Resilience and Psychological Preparedness for Disaster among Airlangga University Health Faculty Students

E3S Web of Conferences ◽

10.1051/e3sconf/202020212025 ◽

2020 ◽

Vol 202 ◽

pp. 12025

Author(s):

Listyati Setyo Palupi ◽

Muhammad Noor Rahman Himawan

Keyword(s):

Disaster Management ◽

Linear Correlation ◽

Survey Method ◽

Correlation Score ◽

Resilience Scale ◽

The People ◽

Coefficient Corrélation ◽

Positive Linear Correlation ◽

Prone Area ◽

National Disaster

National Disaster Management Agency of Indonesia recorded 3,406 disasters events during in Indonesia reached. Research suggest that people who lived in the disasters prone area such as need to be well prepared both physically and psychologically in order to reduce the risk of disaster and ensure that the people are resilience. One of disasters prone area in east part of Java island is East Java Province. In East Java total of disasters occurred are 1537 case. Therefore, it is important to identify their psychological preparedness and resilience in this region. Thus, this study aims to determine whether there is a correlation between resilience with psychological preparedness for disaster. This research was conducted among Airlangga University Health Faculty Students in Surabaya, East Java. This research uses a quantitative approach with a survey method. The scale used are Brief Resilience Scale and Psychological Preparedness for Potential Disasters Scale. The results obtained from this study are that there is a positive linear correlation between resilience and psychological preparedness for disaster with 0.338 coefficient correlation score. That means if the level of resilience is high, the level of psychological preparedness for disaster will also be high. Vice versa.

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Presence of antibodies against Toxoplasma gondii, Neospora caninum and Leishmania infantum in dogs from Piauí

Revista Brasileira de Parasitologia Veterinária ◽

10.1590/s1984-29612011000200004 ◽

2011 ◽

Vol 20 (2) ◽

pp. 111-114 ◽

Cited By ~ 15

Author(s):

Marcos Gomes Lopes ◽

Ivete Lopes Mendonça ◽

Kleber Portela Fortes ◽

Marcos Amaku ◽

Hilda de Fátima Jesus Pena ◽

...

Keyword(s):

Toxoplasma Gondii ◽

Leishmania Infantum ◽

Neospora Caninum ◽

Fluorescent Antibody ◽

Northeastern Brazil ◽

Leishmania Infection ◽

Serum Samples ◽

Chi Square ◽

Leishmania Spp ◽

And Gender

This study aimed to evaluate the presence of antibodies against Neospora caninum, Toxoplasma gondii and Leishmania infantum in dogs attended at the Veterinary Hospital of the Federal University of Piauí, Northeastern Brazil, where there are no reports of the occurrence of N. caninum and T. gondii in dogs. Serum samples from 530 dogs of genders, different ages and breeds from the municipality of Teresina and nearby towns were analyzed using three indirect fluorescent antibody tests, each one targeting one of the three agents. The associations between the parasites and gender, breed and age of the dogs were assessed by the chi-square test (p > 0.05). The occurrence of antibodies to N. caninum, T. gondii and L. infantum was 3.2, 18.0 and 78.1%, respectively. Toxoplasma gondii was more frequently found in older dogs (p < 0.05) whereas L. infantum was more common in animals aged between 1 to 3 years (p < 0.05). In order to evaluate potential associations between the presence of anti-N. caninum and anti-T. gondii antibodies and Leishmania infection, 240 dogs were selected (120 positive and 120 negative for Leishmania spp.), based on serological and parasitological diagnoses. No association was found between Leishmania spp. and the coccidian parasites (p > 0.05). The results confirm the exposure of dogs to these parasites in the State of Piauí.

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