ÖZAmaç: Pterional bölge, orta meningeal arter ve Broca'nın motor konuşma alanının yakınında bulunduğu için önemli, bir bölgedir. Bu neden ile, anterior ve orta kraniyal fossalara cerrahi yaklaşımlarda bu yer önem taşımaktadır. Bu çalışma, Güney Hint insan kafataslarındaki pterion'un yerini ve türünü belirlemek için yapılmıştır.Gereçler ve Yöntemler: Çalışma 50 kuru yetişkin kafatasında yürütülmüştür. Pterion'dan çeşitli kemikli noktalara olan uzaklık, her iki tarafta da vernik kaliper kullanılarak ölçülmüştür. Buna ek olarak pterion, kemikler eklemli, simetri ve kafatasındaki konumu itibariyle sınıflandırılmıştır.Bulgular: Çalışmamızda, sfenoparietal pterion en sık (% 78) rastlanan tip idi. Pterion'un merkezinden frontozigotik dikişe ortalama mesafe 3,97 ± 0,10 cm, zigomatik kemer için 3,27 ± 0,06 cm idi. Ayrıca, pterion'un merkezinden optik kanala içten uzaklık ortalaması 4,02 ± 0,12 cm, sfenoid sırtına 0,77 ± 0,09 cm, orta meningeal artere 0,99 ± 0,07 cm ve en yakın dallarına 0.58 ± 0.12 cm idi.Sonuç: Bu bulgular, çeşitli cerrahi operasyonlarda pterion'un yerinin tam olarak belirlenmesinde yararlı olacaktır.Anahtar kelimeler: Pterion, Pterional yaklaşım, Frontozigomatik sütür, Orta meningeal arter IntroductionThe pterion is an irregular 'H' shaped suture present on the lateral aspect of skull where the squamous part of the temporal bone meets the frontal, sphenoid, and parietal bones. In general, the pterion is considered to be located two finger-breadths above the zygomatic arch and a thumb width posterior to the frontal process of the zygomatic bone [1-2].The pterion forms an important landmark in pathological conditions of many structures that are closely associated with it: including the optic nerve, the orbit, the sphenoidal ridge, the middle cerebral artery, particularly its aneurysms ABSTRACT Objectives:The pterional site is important as it lies in close proximity to the middle meningeal artery and on the left side, to Broca's motor speech area. This location is important in surgical approaches to the anterior and middle cranial fossae. This study was conducted to determine the location and type of pterion in a group of South Indian human skulls. Materials and Methods:The study was conducted on 50 dry adult skulls. The distance from pterion to various bony landmarks were measured on both sides using a vernier caliper. In addition, the pterion was classified depending on bones involved in the articulation, its symmetry and its position in the skull.Results: In the present study a sphenoparietal type of pterion was the most common (78%). The average distance from the center of the pterion to the frontozygomatic suture was 3.97±0.10 cm, to the zygomatic arch was 3.27±0.06 cm. The average distance from the internal aspect of the center of the pterion to the optic canal was 4.02±0.12 cm, to the sphenoid ridge was 0.97±0.09cm, to the stem of middle meningeal artery was 0.99±0.07cm and to its nearest branches was 0.58±0.12 cm.Conclusion: These findings will be useful in relating the position of the pterion to ...
Here we present a unique case of variation in the branching pattern of the coeliac trunk. In the present case, the coeliac trunk was replaced by two separate arterial trunks. The first arterial trunk bifurcated into the left gastric and the left hepatic arteries. The second arterial trunk bifurcated into a splenic artery and a hepato-gastroduodenal trunk. The hepato-gastroduodenal trunk presented an unusual course and termination. The right hepatic artery arising from the hepato-gastroduodenal trunk also showed a variant course. Such rare variations are important for gastroenterological surgeons and interventional radiologists due to increase in number of transplantation surgeries and live donor liver transplantations.
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