Lymphadenopathy corresponds to a swelling of a lymph node, adenomegaly, of inflammatory, infectious or tumoral origin. Superficial lymphadenopathy (neck, armpit, groin) is detectable by simple clinical examination. When of inflammatory or infectious origins, they are relatively soft, sensitive and covered with red and warm skin. When of tumoral origins, they are hard, not locally warm and mobile under the finger. Deep lymphadenopathy (chest, abdomen) is detected during radiological examinations (X-ray, ultrasound, CT or MRI) and can be manifested by signs of compression of nearby organs.