Acute:

1. Acute bacterial lymph node inflammation.
2. Acute lymphatic leukemia.
3. Acute infectious mononucleosis – Epstein Barr Virus.

Chronic:

I . Inflammatory:

1. Nonspecific chronic pyogenic lymphadenitis.
2. Specific
   1. Tuberculosis.
   2. Syphilis.
   3. Sarcoidosis.
   4. Brucellosis.
   5. Fungal disease.

II. Neoplastic:

1. Primary Lymphoma.
2. Lymphosarcoma.
3. Reticulum cell sarcoma.
4. Chronic lymphatic leukemia.
5. Burkitt’s lymphoma.
6. Metastasis from neoplastic lesions from oral cavity and larynx.

III. Autoimmune:

1. Systemic lupus erythromatosis.
2. Juvenile rheumatoid arthritis.

Generalised:

-Hodgkin's disease.
-Lymphosarcoma.
- Lymphatic leukemia.

3. Sarcoidosis.

Diagnosis:

1. Routine blood and X ray tests.
2. Fine Needle Aspiration Cytology.
3. Excision Biopsy of the swelling if required.
4. CT scan to show the extent and consistency of the lymphadenopathy.