teratoma (terÂ´ÉtÅÂ´mÉ) , n a tumor composed of cells capable of differentiating into any of the three primary germ layers. Teratomas in the ovary are usually benign dermoidal cysts; those in the testis are generally malignant.
Necrotic pneumonia is typically due to a bacterial infection that begins to destroy the lung tissue. The most common type of bacteria that causes necrotic pneumonia is Streptococcus pneumoniae, though other species are increasingly being identified in sputum cultures of individuals with this serious form of pneumonia.iagnosis. You can typically diagnose necrotic pneumonia from an X-ray of the chest. A chest X-ray will show pockets or cavities of destroyed tissue, as well as a buildup of fluid in these areas of dead lung tissue. The lungs may also be surrounded by pus or pleural fluid due to the inflammation and tissue damage.
The amount of dust and the kinds of particles involved influence how serious the lung injury will be. For example, after the macrophages swallow silica particles, they die and give off toxic substances. These substances cause fibrous or scar tissue to form. This tissue is the body's normal way of repairing itself.