Overview

The lymphatic system returns interstitial fluid to the venous circulation transports immune cells and absorbs dietary lipids from the gut. Lymphatic vessels drain into regional lymph nodes and ultimately into the thoracic duct or right lymphatic duct. Lymph flow supports fluid balance and immune surveillance.

Lymph Nodes and Organs

Lymph nodes filter lymph and provide sites for antigen presentation and lymphocyte activation. The spleen and thymus contribute to lymphoid function and maturation. Lymphatic architecture varies by region and clinical context.

Lymphatic Pathology

Lymphedema results from impaired lymphatic drainage and causes swelling and infection risk. Lymphadenopathy reflects infection inflammation or malignancy. Imaging lymphoscintigraphy ultrasound and MRI evaluate lymphatic disorders.

Clinical Relevance

Lymphatic involvement is critical in cancer staging and infection management. Surgical and interventional approaches address obstruction and malignancy. Early recognition of lymphatic disease improves symptom control and outcomes.