Infection * Pericoronitis * Staphylococcal lymphadenitis * Mycobacterial lymphadenitis *Rubella *Cat scratch fever *Infectious mononucleosis *Streptococcal pharyngitis *Viral respiratory infection *Toxoplasmosis *Tuberculosis * Brucellosis *Primary herpes simplex infection (primary herpetic gingivostomatitis) * Syphilis (secondary) * Cytomegalovirus * Human immunodeficiency virus * Histoplasmosis *Chicken pox Malignancy Lymph nodes may become enlarged in malignant disease. This<unk>  may be reactive or metastatic. Alternatively, enlarged lymph nodes may represent a primary malignancy of the lymphatic system itself, such as lymphoma (both Hodgkin's and non-Hodgkin's), lymphocytic leukemia,<unk>  that lasts less than two weeks or more than one year with no progressive size increase has a very low likelihood of being neoplastic. Metastatic lymph nodes are enlarged because tumor cells have detached from the primary tumor and started growing in the lymph node ("seeded"). Since cancer generally occurs more frequently in older people, this kind of<unk>  is more common in older persons. Metastatic lymph nodes tend to feel hard and may be fixed to underlying tissues and may or may not be tender. Usually the lymph nodes that directly drain the area of the cancer are affected by the spread (e.g. Sometimes metastatic cervical lymph node is detected before the main cancer). In such cases, this discovery leads to a search for the primary malignancy, firstly in the nearby area with endoscopy, "blind" biopsies, and tonsillectomy on the side of the<unk> . If no tumor is found, then the rest of the body is examined, looking for lung cancer or other possible sites. If still no primary tumor is detected, the term "occult primary" is used. In lymphoma, usually there are multiple enlarged nodes which feel rubbery to palpation. *Rhabdomyosarcoma *Neuroblastoma Other causes *Surgical trauma, e.g. following a biopsy in the mouth *Kawasaki disease, *Kikuchi-Fujimoto disease *Rosai-Dorfman disease *Castleman disease * Sarcoidosis * Lupus erythematosus * Cyclic neutropenia * Orofacial granulomatosis
Cervical lymphadenopathy
Inguinal lymphadenopathy
ALPSA lesion
Axillary lymphadenopathy
Positive axillary lymph node
Cervical enlargement
Cervical thymic cyst
Vaginal adenosis