An 18-Year-Old Man Comes to the Emergency Department with Flank

question 98

Multiple Choice

An 18-year-old man comes to the emergency department with flank pain and red urine for the past day.  Approximately 3 days ago, he experienced flu-like symptoms with rhinorrhea and throat pain that improved with over-the-counter acetaminophen.  The patient has no chronic medical conditions and takes no daily medications.  He does not use tobacco, alcohol, or illicit drugs.  Family history is unremarkable.  Temperature is 37.2 C (99 F) , blood pressure is 126/76 mm Hg, pulse is 88/min, and respirations are 18/min.  The patient has mild costovertebral tenderness.  The remainder of the physical examination is normal.  Laboratory results are as follows: Serum complement levels are normal.  Spiral CT scan of the abdomen is normal.  Which of the following is the most likely diagnosis in this patient?

• A)Acute poststreptococcal glomerulonephritis
• B)Hereditary nephritis
• C)IgA nephropathy
• D)Nephrolithiasis
• E)Thin basement membrane disease

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Definitions:

Continuous

Describes data or a variable that can assume an infinite number of values within a given range, including any value in the continuum of the range.

Categorical

Pertaining to data or variables that represent categories, such as gender, nationality, or marital status.

Correlation Coefficient

A statistical measure that calculates the strength of the relationship between the relative movements of two variables.

Independent Variable

The variable in an experiment or observational study that is manipulated or changed to observe its effect on a dependent variable.