ABSTRACT
Background: The obturator hernia is relatively rare.A preoperative diagnosis is unusual since the manifestration shown is highly variable and often concealed by pectineus muscle.High mortality rate of obturator hernia was due to the difficulty diagnosis and operation.The incidence of obturator hernia has not been reported in Thai cadavers.Objective: To study the incidence of obturator hernia in Thai cadaversResults: During pelvic dissection of 104 cadavers (56 males, 48 females),an obturator hernia (0.96 %) was found on the right side of a female of age 56.The hernial mass consisted of a hernial sac containing fat tissue surrounded by thin fibrous connective tissue,skeletal muscle and its fascia.The hernial mass plugged in the obturator foramen with obturator nerve and vessels.The distal end of the hernial mass pass through the obturator canal to the thigh and located above pectineus muscle.Surprisingly,the obturator membrane and obturator externus muscle was absent.Histological study of the distal end of the hernial mass revealed its contents identical to the greater omental tissue.Conclusions: During gross dissection,an obturator hernia (0.96%) was found on the right side of a female of age 56.The hernial contents showed histological characteristics identical to omental tissue and was surrounded by peritoneum,skeletal muscle and its fascia.The absence of obturator membrane and obturator externus muscle in this case might be the weakpoint and caused obturator hernia consequently.
ABSTRACT
Background: Variations of the branches of the arch of aorta are mostly resulted from abnormal development of the branchial arches.Objective: To present the abnormal origin of the right subclavian artery associated with abnormal thoracic duct and the right recurrent laryngeal nerve Methods: Dissection of the mediastinum was carefully done to investigate the great vessels of the arch of aorta. The outer diameter and length of the anomalous rightsubclavian artery were measured. The other abnormally related structures were identified.Results: The anomalous right subclavian artery was incidentally found in a female cadaver of 80 year-old. It arose as the fourth branch of the distal part of the arch of aorta and traveled across the midline at T3 retroesophageally to reach the right upper extremity. This anomalous artery was the biggest branch of the great vessels of the arch of aorta. It was associated with the abnormal right-sided thoracic duct and the absence of the right recurrent laryngeal nerve.Conclusions: A case of 80 year-old female cadaver showed the abnormal origin of the right subclavian artery arising as the fourth branch of the distal part of the arch of aorta. It was associated with the abnormal right-sided thoracic duct and the absence of the right recurrent laryngeal nerve.Keywords: Anomalous subclavian artery, arch of aortic, abnormal development, anatomical variation