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 cancer, which is attributed to advanced stage disease at the time of diagnosis. Early detection is imperative for increasing chances of survival. Free screening clinics for head and neck cancers during Oral, Head and Neck Cancer Awareness week, sponsored by the Head and Neck Cancer Alliance, provides opportunities for earlier diagnosis of malignant cancer. Screenings for oral, head and neck cancer are generally available via your local physician, dentist and other healthcare facilities. The Head and Neck Cancer Alliance offers free screenings nationwide;free screenings are offered predominantly during Oral, Head and Neck Cancer Awareness Week in April at healthcare events