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.
A pulmonary abscess is defined as necrosis of the pulmonary parenchym caused by microbial infections. The most common organisms are anaerobe bacteria. Local conditions, host resistance and infecting agents all play a role in the formation of pulmonary abscesses. An underlying endobronchial obstructing lung cancer predisposes for the development of a pulmonary abscess.