This section of Pediatrics in Review reminds clinicians of those conditions that can present in a misleading fashion and require suspicion for early diagnosis. Emphasis has been placed on conditions in which early diagnosis is important and that the general pediatrician might be expected to encounter, at least once in a while. The reader is encouraged to write a possible diagnosis for each case before turning to the discussion, which is on the following page.

We invite readers to contribute case presentations and discussions.

A 5-year-old Mexican-born girl now living in the United States is admitted to the pediatric ward because of an exacerbation of her asthma. She has had a fever for 6 days, and for the last 2 days has experienced shaking chills, shortness of breath,and wheezing. Her appetite has diminished, and an initial bout of diarrhea has been followed by constipation. For 3 days she...

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