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
Head and Neck Cancer Alliance head and neck cancer In addition to year-round events and awareness efforts such as benefit concerts and walkathons, the Alliance sponsors a week-long series of events to promote early detection and public awareness of this disease. Oral, Head and Neck Cancer Awareness Week (OHANCAW), Cancers of the mouth (lip and tongue), larynx (voice box), pharynx (throat), salivary glands, and nose/nasal passages are generally known as head and neck cancer. These cancers typically form in the squamous cells, which are the cells lining the moistened, mucosal locations of the head and neck, such as the nose, mouth and throat. Such squamous