The aneurysm prevalence in the evaluated sample was similar to the reported in other populations. In this work, the presence of aneurysms on the origin of the anterior chorioid artery, an unusually reported localization, was prominent.
RESUMEN:El tronco celíaco (TC) es la rama de la arteria aorta abdominal (AA) que aporta la irrigación a la porción distal del esófago, parte media del duodeno, al estómago, páncreas, bazo y suple adicionalmente al hígado; sus diferentes expresiones anatómicas son reportadas en los diferentes grupos poblacionales con incidencia variable. Se evaluó las características morfológicas del TC y sus ramas en 26 bloques del piso supramesocólico de cadáveres masculinos adultos no reclamados, del grupo poblacional mestizo, a quienes se les practico autopsia en el Instituto de Medicina Legal de Bucaramanga -Colombia. Se observo el tipo I del TC en 23 especímenes (88,4 %), del cual correspondió 16 muestras (61,5 %). Al subtipo Ia con bifurcación y formación de tronco hepatoesplénico. Hubo un caso (3,8 %) en donde las ramas del T se originaron de manera independiente de la AA. El TC presentó una longitud promedio de 18,6 DE 7,53 mm y un diámetro externo de 7 DE 1,24 mm. De las ramas del TC, la AE presentó un diámetro promedio de 5,89 DE 1,04 mm sin diferencias estadísticamente significativa con relación al diámetro de la AHC, pero si con relación al diámetro de la AGI (P= 0,70; p<0,001 respectivamente). La gran mayoría de la muestra avaluada muestra la presencia de tronco hepatoesplénico seguido de la trifurcación en una verdadera configuración de trípode. El conocimiento de los patrones de ramificación del TC debe ser tomado en cuenta por cirujanos gastroenterólogos, radiólogos intervencionistas y oncólogos para evitar complicaciones durante los procedimientos quirúrgicos abdominales.
SUMMARY:The most frequent anatomic variations of the musculocutaneous nerve could be divided in two main groups: communicating branches with the median nerve and variations in relation to the origin, which in turn can be subdivided into absence of the nerve and non-perforation of the coracobrachialis muscle. Unusual clinical symptoms and/or unusual physical examination in patients with motor disorders, could be explained by anatomic variations of the musculocutaneous nerve. A total of 106 arms were evaluated, corresponding to 53 fresh male cadavers who were undergoing necropsy. The presence or absence of the musculocutaneous nerve was evaluated and whether it pierced the coracobrachialis muscle or not. The lengths of the motor branches and the distances from its origins to the coracoid process were measured. In 10 cases (9.5 %) an unusual origin pattern was observed, of which six (5.7 %) correspond to non-perforation of the coracobrachialis muscle and four (3.8 %) correspond to absence of the nerve. The length of the branch for the brachialis muscle was 37.7±15.4 mm and for the short and long heads of the biceps 27.6±11.7 mm and 33.2±10.1 mm respectively. The study showed that our population has similar prevalence of absence of the musculocutaneous nerve and non-perforation of the coracobrachialis muscle compared to previous reports in different populations. Moreover, there was no statistical correlation between the sides and the evaluated variables.
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