Posterior triangle of the neck which divides the space into two triangles: A) Nerves and plexuses: B) Vessels: C) Lymph nodes: D) Muscles: The accessory nerve (CN XI) is particularly vulnerable to damage during lymph node biopsy. Damage results in an inability to shrug the shoulders or raise the arm above the head, particularly due to compromised trapezius muscle innervation. The Internal jugular vein's superficial location within the posterior triangle also makes it vulnerable to injury. Posterior triangle of the neck The posterior triangle (or lateral cervical region) is a region of the neck. It has the following boundaries: Apex: Union of the sternocleidomastoid and
Varicose veins insufficiency method (CHIVA), which intends saving the veins, decreases varicose veins and is safer than vein stripping in those with chronic venous insufficiency. CHIVA comes from the French translation for the technique, conservatrice et hémodynamique de l'insuffisance veineuse en ambulatoire. The operation involves performing one to four small incisions on average, under local anesthesia, to remove by precise ligatures abnormal blood flow due to valvular incontinence and responsible for varicose vein dilation. The patient returns home the same day. This method tends to correct the venous functions in order to cure the symptoms of venous insufficiency such as varicose veins,