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Objectives: The relationship between the mastoid triangle and the localization of the Asterion can be used in craniotomy and posterolateral surgical approaches. Therefore, we aimed to identify the relationship between the localization of the Asterion and mastoid triangle in dry skulls and its effect on surgery. Methods: Our study was performed on 93 adult skulls obtained from bone collections of the Anatomy Departments of Necmettin Erbakan University and Akdeniz University. The mastoid triangle, Asterion and linear distances between them were measured for to determine the localization of the Asterion. Results: The Asterion was located just above the Frankfurt horizontal plane on the left sides of the skulls in 54 (58.1%) specimens and on the right sides of the skulls in 71 (76.3%). It was located below the Frankfurt horizontal plane on the left sides of the skulls in 39 (41.9%) specimens; and on the right sides of the skulls in 19 (20.4%). There was a positive correlation between the distance of Asterion to apex of the mastoid process (r=0.832). Conclusion: The relationship between the mastoid process and the Asterion can be used for determination of the dural venous sinuses and neighboring neurovascular structures, in retrosigmoid posterolateral surgical approaches.

Entrapment neuropathies, also known as nerve compression syndrome orcompression neuropathy, may be defined as the lesions of the peripheral nervesunder exposure of any kind of physical stress, including any kind of traumasand inflammatory or edematous processes, on the route of the nerve to thetarget tissue. While performing a radiologic examination of multi-detectorcomputerized tomography images of vascular structures in the right shoulderregion of a 43 years old female Turkish patient who admitted to our hospital,we observed a complete ossification of the superior transverse scapularligament. This case report, which is discussed in the clinical perspectives ofanatomic variations, puts forth that radio-anatomic images about variations,like the one used in this report, are of importance while illuminating theetiopathologic background of entrapment neuropathies of the shoulder region., Kompresyon nöropatileriolarak da bilinen tuzak nöropatiler, travma, inflamasyon veya ödem gibi herhangibir sebebe bağlı olarak, periferik sinirin hedef dokuya seyri esnasında baskıyauğramasıdır. Hastanemize başvuran 43 yaşındaki bir kadın hastanınmultidedektörlü bilgisayarlı tomografi görüntülerinin incelenmesi esnasındaligamentum transversum scapulae superius’un kemikleştiği gözlendi. Anatomikvaryasyonların klinik perspektifte tartışıldığı bu vaka takdimi, varyasyonlarınradyo-anatomik görüntülerinin omuz bölgesindeki tuzak nöropatilerinaydınlatılmasındaki önemini ortaya koymaktadır.

The coeliac trunk and the superior mesenteric artery are the two ventral branches which are arising from abdominal aorta and supply blood to wide area at the supracolic compartment. An abdominal vascular variation of a 65 years old patient who is diagnosed with acute aortic dissection was encountered. While evaluating the anatomic structures on the angiographies, we observed that the branching pattern of the coeliac trunk was not presenting trifurcation nature and the common hepatic artery was arising from the superior mesenteric artery. This report of branching variation which was presented with its anatomic aspects may help clinician while planning and performing some invasive surgical or radiological procedures., Truncus coeliacusve arteria mesenterica superior abdominal aortun, suprakolik kompartımanda geniş bir alanı kanlandıran, iki ventral dalıdır. Akut aort diseksiyonu teşhisi alan 65 yaşındaki bir hastada bu abdominal damarlarda varyasyona rastlandı. Anjiografide anatomik yapıların değerlendirilmesi esnasında truncus coeliacus’un trifurkasyon yapısını sergilemediği, arteria hepatica propria’nın arteria mesentericasuperior’dan çıktığı gözlendi. Truncus coeliacus’un anatomik yönü açısından, bu dallanma varyasyonu, klinisyenlere bazı girişimsel cerrahi veya radyolojik prosedürlerin planlanmasında ve uygulanmasında yardımcı olabilir.