Scroll Bar
A vertical scroll bar will appear at the right edge of the screen when a test item is too long to be displayed on a single screen. A scroll bar is shown below:
To scroll a test item, drag the scroll box to the desired location. Alternatively, when your cursor is in the item window, you may press the Page Up or Page Down keys on the keyboard to move in the desired direction.
Note: There is a border around each set of response options. If you do not see the bottom border, use the scroll bar to view the additional response options. Some items may also contain tables or graphics that will scroll horizontally when the lab value panel is displayed.
Practice: Use the scroll bar or the Page Up and Page Down keys to display the entire item below.
A previously healthy 34-year-old woman is brought to the physician because of fever and headache for 1 week. She has not been exposed to any disease. She takes no medications. Her temperature is 39.3°C (102.8°F), pulse is 104/min, respirations are 24/min, and blood pressure is 135/88 mm Hg. She is confused and oriented only to person. Examination shows jaundice of the skin and conjunctivae. There are a few scattered petechiae over the trunk and back. There is no lymphadenopathy. Physical and neurologic examinations show no other abnormalities. Test of the stool for occult blood is positive. Laboratory studies show:
| Hematocrit | 32% with fragmented and nucleated erythrocytes |
| Leukocyte count | 12,500/mm3 |
| Platelet count | 20,000/mm3 |
| Prothrombin time | 10 sec |
| Partial thromboplastin time | 30 sec |
| Fibrin split products | negative |
| Serum | |
| Urea nitrogen | 35 mg/dL |
| Creatinine | 3.0 mg/dL |
| Bilirubin | |
| Total | 3.0 mg/dL |
| Direct | 0.5 mg/dL |
| Lactate dehydrogenase | 1000 U/L |
Blood and urine cultures are negative. A CT scan of the head shows no abnormalities. Which of the following is the most likely diagnosis?
