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Jenilkumar Patel(Jenilkumar Patel ),Graham Dupont(Graham Dupont ),Joho Katsuta(Joho Katsuta ),Joe Iwanaga(Joe Iwanaga ),Łukasz Olewnik(Łukasz Olewnik ),R. Shane Tubbs(R. Shane Tubbs ) 대한해부학회 2023 Anatomy & Cell Biology Vol.56 No.1
Tibialis anterior (TA) muscle originates from the lateral surface of tibia and its tendon attaches to the medial cuneiform and base of the first metatarsal. The TA muscle is responsible for both dorsiflexion and inversion of the foot. We present a case of bilateral TA muscle variations that diverge slightly from the current classification systems of this muscle. Recognizing variations such as these may be important for anatomists, surgeons, podiatrists, and physicians. Following routine dissection, an accessory tendon of the TA muscle was found on both sides. Accessory tendons of the extensor hallucis longus and extensor hallucis brevis joined to form a common tendon on both sides. We believe that this unique case will help further the classification systems for the tendons of the TA and also be informative for clinical anatomists as well as physicians treating patients with pathology in this region.
The clinical anatomy of the accessory submandibular gland: a comprehensive review
Andrea Yazbeck(Andrea Yazbeck ),Joe Iwanaga(Joe Iwanaga ),Jerzy A. Walocha(Jerzy A. Walocha ),Łukasz Olewnik(Łukasz Olewnik ),R. Shane Tubbs(R. Shane Tubbs ) 대한해부학회 2023 Anatomy & Cell Biology Vol.56 No.1
An accessory submandibular gland is a rare variation. As such, there is limited literature regarding the embryology, anatomy, variations, clinical imaging, and pathology of the accessory submandibular gland. In this article, we review the existing literature on the accessory submandibular gland from clinical and anatomical perspectives. The goal of this review is to provide comprehensive knowledge of this variation which can be useful for oral and maxillofacial/head and neck surgeons, radiologists, and anatomists. Within this review, the embryologic origin as well as the anatomy of the accessory submandibular gland is detailed. Several imaging modalities which can be used to visualize the accessory submandibular gland are outlined as well as its variations. Lastly, this review investigates several reported clinical considerations regarding the accessory submandibular gland including sialoliths, Wharton’s duct obstruction, and pleomorphic adenoma.
Cadaveric findings of a duplicated superior petrosal sinus
Tina K. Reddy,Łukasz Olewnik,Joe Iwanaga,Aaron S. Dumont,R. Shane Tubbs 대한해부학회 2022 Anatomy & Cell Biology Vol.55 No.3
Knowledge of the intracranial dural venous sinuses and their variations is important in the diagnosis and management of many cranial pathologies. We report a unique duplication of the right-sided superior petrosal sinus identified during routine dissection of the skull base.. Lateral to this sinus, a separate and more curvilinear superior petrosal sinus left the normally positioned superior petrosal sinus and traveled posteriorly near the foramen spinosum and then turned medially to drain into the normally positioned superior petrosal sinus. Anteriorly, the two sinuses joined together and drained into the cavernous sinus. Posteriorly, the laterally positioned sinus drained into the normally positioned sinus which then traveled in normal fashion along the petrous ridge to end in the transverse sinus. To our knowledge, such a duplication has not been previously reported in the extant medical literature.
Uduak-Obong I. Ekanem,Łukasz Olewnik,Andrea Porzionato,Veronica Macchi,Joe Iwanaga,Marios Loukas,Aaron S. Dumont,Raffaele De Caro,R. Shane Tubbs 대한해부학회 2022 Anatomy & Cell Biology Vol.55 No.2
Although adequate venous drainage from the cranium is imperative for maintaining normal intracranial pressure, the bony anatomy surrounding the inferior petrosal sinus and the potential for a compressive canal or tunnel has, to our knowledge, not been previously investigated. One hundred adult human skulls (200 sides) were observed and documented for the presence or absence of an inferior petrosal groove or canal. Measurements were made and a classification developed to help better understand their anatomy and discuss it in future reports. We identified an inferior petrosal sinus groove (IPSG) in the majority of specimens. The IPSG began anteriorly where the apex of the petrous part of the temporal bone articulated with the sphenoid part of the clivus, traveled posteriorly, in a slight medial to lateral course, primarily just medial to the petro-occipital fissure, and ended at the anteromedial aspect of the jugular foramen. When the IPSGs were grouped into five types. In type I specimens, no IPSG was identified (10.0%), in type II specimens, a partial IPSG was identified (6.5%), in type III specimens, a complete IPSG (80.0%) was identified, in type IV specimens, a partial IPS tunnel was identified (2.5%), and in type V specimens, a complete tunnel (1.0%) was identified. An improved knowledge of the bony pathways that the intracranial dural venous sinuses take as they exit the cranium is clinically useful. Radiological interpretation of such bony landmarks might improve patient diagnoses and surgically, such anatomy could decrease patient morbidity during approaches to the posterior cranial fossa.
Fenestrated popliteal vein pierced by a branch of the tibial nerve
Edward C. Muo,Joe Iwanaga,Juan J. Cardona,Łukasz Olewnik,Aaron S. Dumont,R. Shane Tubbs 대한해부학회 2023 Anatomy & Cell Biology Vol.56 No.4
Knowledge of anatomical variations is important so as to avoid potential iatrogenic injury or misdiagnosis on imaging. Here we report an unusual finding and relationship between the tibial nerve and popliteal vein. During the routine dissection of an adult cadaver, it was noted that a branch of the tibial nerve in the popliteal fossa pierced the most distal part of the popliteal vein. This unusual finding is described and relevant reports in the literature discussed. Our hopes are that such a report might help surgeons avoid injury to such a fenestrated popliteal vein and the tibial nerve branch traveling through it therefore decreasing patient morbidity.