an accumulation of cells which is not NEOPLASTIC. Sometimes the result of the body's normal reaction to an imbalance or other stimulus. Sometimes the cause is not apparent. Example: the enlargement of lymph nodes in the neck as a result of reaction to a bacterial throat infection. The lymphocytes which make up the node divide and proliferate, taking up more volume in the node and causing it to expand. In this case being synonymous with INFLAMMATION.
Overdevelopment of the mandible, mandibular condyle, or cranial bones, that is congenital or acquired. A non-neoplastic increase in the number of normal cells. It can occur locally as in the condyle or coronoid or in the entire mandible or side of the face.
A proliferation of cells which is reactive and not neoplastic. In some cases, this may be a result of the body's normal reaction to an imbalance or other stimulus, while in other cases the physiologic cause of the proliferation is not apparent. An example of the former process is the enlargement of lymph nodes in the neck as a result of reaction to a bacterial throat infection.
Hyperplasia (or "hypergenesis") is a general term for an increase in the number of the cells of an organ or tissue causing it to increase in size. It may be due to any number of causes including (but not limited to) increased demand, chronic inflammatory response, hormonal dysfunctions, or neoplasia.