Nonencapsulated tumors tend to infiltrate brain tissue These ...

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Nonencapsulated tumors tend to infiltrate brain tissue
 
  These tumors can arise in any part of brain connective tissue and infiltrate primarily cerebral hemisphere tissue. These tumors grow rapidly and are difficult to excise completely. The tumors described are classified as
 
  a. angiomas.
  b. pituitary adenomas.
  c. meningiomas.
  d. gliomas.

Question 2

The most common cause of disseminated intravascular coagulation (DIC) is
 
  a. sepsis caused by gram-positive organisms.
  b. sepsis caused by gram-negative organisms.
  c. sickle cell anemia.
  d. burns.

[dmurph1496]

Answer to Question 1

D
Gliomas are nonencapsulated; tend to infiltrate brain tissue; arise in any part of brain connective tissue; infiltrate primarily cerebral hemisphere tissue; are not well outlined, so they are difficult to excise completely; and grow rapidly. Most persons live months to years after diagnosis. Tumors are assigned grade from I to IV, with IV being most malignant. Angiomas arise from vascular structures and are usually difficult to resect. Pituitary adenomas arise from various tissues. A surgical approach is usually successful, and recurrence is possible. Meningiomas arise from meningeal coverings of brain. They are usually benign but may undergo malignant changes. They are usually encapsulated. Surgical cure is possible but so is recurrence.

Answer to Question 2

B
Although all of these answers can cause DIC, sepsis, particularly that caused by gram-negative organisms, can be identified as the culprit in as many as 20 of cases, making it the most common cause of DIC.

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