Hyaline vascular type is one of the reactive lymphadenopathies of undetermined cause, which is relatively rare in clinical practice, and is characterized by significant enlargement of deep or superficial lymph nodes, and some cases may be accompanied by systemic symptoms and/or multi-systemic damages, and most of them have good results after surgical resection of the enlarged lymph nodes. Hyaline vascular type is divided into 3 types: Hyaline vascular type (HV), plasma cell type (PC) and mixed type. HV type is characterized by the increase of lymphoid follicles, there is extensive hyaline degeneration of capillary hyperplasia, and some of the lymphocytes can be arranged in layers around the center, such as “onion skin”, with the disappearance of the growth center and the disappearance of the lymphatic sinus or fibrosis. The PC type is characterized by a large number of mature plasma cells between lymphoid follicles, and hyaline degeneration of blood vessels is rare. The mixed type has the characteristics of the above two types and is commonly found in areas other than the lymph nodes. It is generally believed that the hyaline vascular type is more common, accounting for more than 90% of cases, and most of them do not have systemic symptoms and belong to the clinical focal type, and all three cases in our hospital belong to this type, while the plasma cell type is rare, less than 10%, and some of them are accompanied by systemic manifestations, and most of the multicenter type in the clinical type corresponds to this type.CD has diversified forms of onset of disease, and most of them consult the doctor for the symptoms of compression by the mass. Vessel wall thinning Capillaries are the thinnest and most widely distributed blood vessels. They branch and anastomose into a network. The degree of sparseness of capillary network varies greatly among organs and tissues. Tissues and organs with high metabolism, such as skeletal muscle, cardiac muscle, lungs, kidneys and many glands, have a dense capillary network; tissues with low metabolism, such as bones, tendons and ligaments, have a sparse capillary network. Vascular injuries Vascular injuries are divided into: complete dissections, partial ruptures, contusions of the vessel wall, intimal tears and arterial spasms, hemorrhages, tension hematomas and acute arterial hypoperfusion (pallor, hypothermia, numbness, dyskinesia, severe pain and loss of distal arterial pulsations) and other manifestations of open vascular injuries or closed vascular injuries such as insufficient supply of blood, interruptions and obstruction of blood return to distal limbs and other symptoms of vascular injuries. The clinical manifestations of CD are not specific. Any person with obvious lymph node enlargement, with or without systemic symptoms, should think of the possibility of CD, and the diagnosis can only be made when the lymph node biopsy obtains the above typical pathological changes of CD, i.e., the definitive diagnosis of CD must be supported by pathological arguments, and then the diagnosis of CD should be made according to the clinical manifestations and the pathology of CD, and then the diagnosis of CD should be made according to the classification of CD. Various possible related diseases should be excluded before the diagnosis is confirmed.