EVERYDAY SCIENCE

Detailed explanation-1: -A small bean-shaped structure that is part of the body’s immune system. Lymph nodes filter substances that travel through the lymphatic fluid, and they contain lymphocytes (white blood cells) that help the body fight infection and disease. There are hundreds of lymph nodes found throughout the body.

Detailed explanation-2: -A normal lymph node is ovoid in shape, hypoechoic to the adjacent muscle and frequently contains an echogenic fatty hilum (Fig. 1a). The hilum is a linear, echogenic, non-shadowing structure that contains the nodal vessels and it appears continuous with the fat around the node.

Detailed explanation-3: -The lymph node is an oval-shaped organ of the lymphatic system, which is widely distributed throughout the body.

Detailed explanation-4: -The lymph node is oval in shape with both peripheral (arrowheads) and hilar (arrow) vascularity. Power Doppler ultrasonography evaluation of nodal vascular pattern has been reported to have high sensitivity (83–89%) and specificity (87–100%) for differentiating metastatic and reactive nodes[10, 12, 68].