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  Indian J Med Microbiol
 

Figure 5: (a) This image is not an EUS image. It is an external ultrasound image which has been included to clarify the anatomical landmarks visualized during EUS. The dotted outline shows the area of the carotid sheath. Anterior (Central) compartment Group VI lymph nodes include the pre- and para-tracheal nodes, the precricoid (Delphian) node, and the perithyroidal nodes. The superior boundary is the hyoid bone. The trachea and the thyroid mark the anterior compartment. A transverse section of ultrasound from the neck shows the thyroid gland and a lymph node lateral to thyroid gland between the left common carotid and left internal jugular vein. The lower jugular group consists of lymph nodes located around the lower third of the internal jugular vein extending from the inferior border of the cricoid (above) to the clavicle (below). (b) The union of the two vein is seen in the base of the neck, and the dilated lower part of the internal jugular vein is called as the inferior bulb. The carotid sheath is made of contribution from pretracheal, precervical, and superficial fascia. Upper Jugular Group is comprised lymph nodes located around the upper third of the internal jugular vein extending from the level of the skull base (above) to the level of the inferior border of the hyoid bone (below). The middle jugular group consists of lymph nodes located around the middle third of the internal jugular vein extending from the inferior border of the hyoid bone (above) to the inferior border of the cricoid cartilage (below). (c) The left common carotid artery lies in the carotid sheath in anterolateral relations to esophagus and the sternocleidomastoid muscle lies lateral to the carotid sheath. (d) The thyrocervical trunk is a branch of the subclavian artery arising from the first portion of this vessel, i.e., between the origin of the subclavian artery and the inner border of the scalenus anterior muscle. LBCV: Left brachiocephalic vein; LSCV: Left subclavian vein; LCC: Left common carotid; LIJV: Left internal jugular vein; IJV: Internal jugular vein

Figure 5: (a) This image is not an EUS image. It is an external ultrasound image which has been included to clarify the anatomical landmarks visualized during EUS. The dotted outline shows the area of the carotid sheath. Anterior (Central) compartment Group VI lymph nodes include the pre- and para-tracheal nodes, the precricoid (Delphian) node, and the perithyroidal nodes. The superior boundary is the hyoid bone. The trachea and the thyroid mark the anterior compartment. A transverse section of ultrasound from the neck shows the thyroid gland and a lymph node lateral to thyroid gland between the left common carotid and left internal jugular vein. The lower jugular group consists of lymph nodes located around the lower third of the internal jugular vein extending from the inferior border of the cricoid (above) to the clavicle (below). (b) The union of the two vein is seen in the base of the neck, and the dilated lower part of the internal jugular vein is called as the inferior bulb. The carotid sheath is made of contribution from pretracheal, precervical, and superficial fascia. Upper Jugular Group is comprised lymph nodes located around the upper third of the internal jugular vein extending from the level of the skull base (above) to the level of the inferior border of the hyoid bone (below). The middle jugular group consists of lymph nodes located around the middle third of the internal jugular vein extending from the inferior border of the hyoid bone (above) to the inferior border of the cricoid cartilage (below). (c) The left common carotid artery lies in the carotid sheath in anterolateral relations to esophagus and the sternocleidomastoid muscle lies lateral to the carotid sheath. (d) The thyrocervical trunk is a branch of the subclavian artery arising from the first portion of this vessel, i.e., between the origin of the subclavian artery and the inner border of the scalenus anterior muscle. LBCV: Left brachiocephalic vein; LSCV: Left subclavian vein; LCC: Left common carotid; LIJV: Left internal jugular vein; IJV: Internal jugular vein