An unusual unilateral variation in the branching pattern of axillary artery was observed in a 60 year oíd female embalmed cadáver. The axillary artery had only two branches arising from its proximal (first) part and no branches from its remaining distal (second & third) parts. The branches are superior thoracic (usual) and another large collateral (unusual) branch. This collateral branch is the origin of several important arteries as the circumflex scapular, thoracodorsal, posterior circumflex humeral, thoraco-acromial and lateral thoracic arteries. We propose to ñame this artery as common subscapular trunk. The course of this collateral artery (common subscapular trunk) and its branches and also clinical significance of this variation are discussed in the paper.

Una inusual variación unilateral en el patrón de ramificación de la arteria axilar se observó en un cadáver embalsamado de 60 años de edad. La arteria axilar tuvo sólo dos ramas derivadas de su parte proximal (primera) y no otorgó ramas de su parte distal (segunda y tercera). Las ramas son superiores torácica (habitual) y otra gran rama colateral (inusual). Esta rama colateral es el origen de varias arterias importantes como la circunflej a escapular, toracodorsal, circunflej a humeral posterior, taraco-acromial y torácica lateral. Proponemos el nombre variación arterial como tronco común subescapular. El curso de este tronco común subescapular y sus ramas y también el significado clínico de esta variación son discutidas en este trabajo.

Variações arteriais de partes distais dos membros inferiores estão bem documentadas e podem ser demonstradas com o auxílio de ultra-sonografia Doppler ou por arteriografia. Entretanto, a ausência ou variação da artéria tibial posterior é um raro achado. Apresentamos um caso de artéria tibial posterior hipoplásica que terminava suprindo o músculo solear. Esse suprimento arterial variante foi fornecido pela artéria peroneal aumentada que continuava como artéria plantar lateral. Estar consciente dessas variações é importante para cirurgiões vasculares ao realizarem reconstruções arteriais em procedimentos de derivação femorodistal, bem como para ortopedistas durante correção cirúrgica do pé torto.

Arterial variations of distal parts of lower extremities are well-documented and can be demonstrated with the help of Doppler ultrasound or by arteriography. However, absence or variation of posterior tibial artery is considered a rare finding. We present a case of hypoplastic posterior tibial artery that terminated by supplying soleus muscle. The variant arterial supply to the sole was provided by the enlarged peroneal artery that continued as the lateral plantar artery. The awareness of these variations is important to vascular surgeons while performing arterial reconstructions in femorodistal bypass graft procedures, and also to orthopedists during surgical clubfoot release.

OBJECTIVE: The omohyoid muscle is a long, thin muscle consisting of superior and inferior bellies and an intermediate tendon, which runs obliquely in the lateral cervical region. The omohyoid is important in neck dissections because it is the surgical landmark for level III and IV lymph node metastases. METHODS: In the present study, the anterior and posterior triangle of the neck was dissected in 35 male cadavers and observed for variations in the omohyoid bilaterally. Observations were focused on variations in number, attachments, and position of omohyoid. RESULTS: Among the 35 cadavers studied, double omohyoid was present in one cadaver, inferior belly originated from the clavicle in three cadavers, superior belly merged with the sternohyoid in two cadavers, and the omohyoid received additional slips from the sternum in one cadaver. Standard attachment and position of the omohyoid was observed in the remaining cadavers. CONCLUSION: Variations of this muscle are important because of its close relation to the large vessels and brachial plexus. Because of the direct adhesion of the intermediate tendon to the anterior wall of the internal jugular vein and its connection with it through a thin lamina of the pretracheal layer of the cervical fascia, the contraction of the omohyoid muscle has a direct effect on the lumen of this vessel.

This comprehensive anatomical study on bones and X-rays regarding pedicles of lumbar vertebrae was performed in two parts. In the first part of the present work direct gross measurements of 3 different diameters (v, d, and 1) of both the pedicles of LI to L5 vertebrae (200 male and 200 female) were recorded through sliding vernier caliper. In the second part plain anteroposterior radiographs of the lumbar spine from 500 individuals (250 males and 250 females) were collected, and divided in 6 age groups and 2 different diameters (t and h) were recorded. The minimum horizontal diameter (d) of both the pedicles increased from LI to L5. Whereas, the vertical height (v) of both the pedicles increased from LI to L2, decreased from L2 to L3 and increased from L3 to L5. The anteroposterior length (1) increased bilaterally from LI to L2 and decreased from L2 to L5. All the aforementioned parameters were greater in male than corresponding vertebrae of female. Same trends were confirmed by the radiological study. The maximum horizontal diameter (t) of pedicles on both sides of vertebrae was significantly greater in females in less than 20 years of subjects, due to early pubertal growth spurt, whereas it was significantly greater in males in rest of all the age groups at all segments of vertebral spine. The maximum vertical height (h) of both the pedicles was significantly greater in males of age groups greater than 30 years from LI to L5

Este estudio sobre huesos y radiografías del pedículo de las vértebras lumbares fue realizado en dos partes. En la primera se midieron directamente con un caliper, 3 parámetros (v, d, y 1) en los pedículos de Ll a L5 (200 casos de sexo femenino y 200 de sexo masculino). En la segunda parte, se recolectaron 500 radiografías anteroposteriores (250 de hombres y 250 de mujeres) y se dividieron en 6 grupos etarios, registrándose dos diferentes diámetros (t y h). El diámetro horizontal menor se incrementó de Ll a L5 mientras que la altura vertical (v) de ambos pedículos de Ll a L2, decreció de L2 a L3 y se incrementó de L3 a L5. La longitud anteroposterior (1) se incrementó bilateralmente de Ll a L2 y decreció de L2 a L5. Todos los parámetros mencionados fueron mayores en el hombre que en la mujer. Los mismos se confirmaron en el estudio radiográfico. El diámetro horizontal máximo (t) de los pedículos de ambos lados fue significativamente mayor en mujeres con menos de 20 años debido a un temprano crecimiento acelerado en la pubertad mientras que, fue significativamente mayor en los hombres en todos los grupos etarios, en la totalidad de las vértebras. La altura vertical máxima de ambos pedículos fue significativamente mayor en los hombres del grupo mayor de 30 años desde Ll a L5

During routine dissection practice a supernumerary muscle was found on the right side infraclavicular region of a male cadaver. This muscle was arising from the superior surface of the first rib and its coastal cartilage and inserted to a thick ligament that extended from the medial end of the suprascapular notch to the capsule of the acromioclavicular joint. This accessory muscle slip was innervated by a branch from the nerve to subclavius. According to its location and innervation the aberrant muscle was considered to be the subclavius posticus. The anatomic relationships of the muscle make it clinically significant

Durante una disección de rutina, un músculo supernumerario fue encontrado en el lado derecho de la región infraclavicular de una cadáver de sexo masculino. Este músculo se originaba de la superficie superior de la primera costilla y cartílago costal y se insertaba en un grueso ligamento que se extendía desde la parte medial de la incisura supraescapular a la cápsula de la articulación acromioclavicular. Este músculo estaba inervado por un ramo del nervio subclavio. De acuerdo a su localización e inervación el músculo aberrante fue considerado como el músculo subclavio posticus. Las relaciones anatómicas del músculo tienen significancia clínica