Consultant for Pediatricians Vol 23 No 5

A 12-year-old girl complains of left knee pain and swelling that resulted from a collision with another player while she was playing kickball the day before. Her left foot was planted as she tried to catch a ball, and she was hit on the outside of the left knee. She fell to the ground and was unable to walk on the injured leg; overnight, the knee became more swollen and painful.

A 7-week-old white boy presented to the emergency department (ED) with vomiting and weight loss. His parents brought him to the ED 3 weeks earlier after he had vomited for several days. Possible milk protein allergy was diagnosed at that visit, and a change from cow milk formula to an elemental formula was recommended. Vomiting subsequently increased in frequency. Nonbilious but forceful vomiting occurred with each feeding. The patient lost nearly 2 lb during the 3 weeks that followed the first ED visit.

An otherwise healthy 11-month-old infant hadhad an intermittent, nonpruritic rash for mostof his life. The lesions recurred mainly onthe extremities and trunk without a particulartrigger. Applications of 1% hydrocortisonecream were only partially beneficial. The joints and nailswere not affected. The patient’s maternal grandfather hadsevere psoriasis.

A white ring recently developed around this lesion on the upper back of a 15-year-old boy. Is there any reason for concern--and what clues would you use to suggest the need for a biopsy?

During their physical examination of this infant who had been born at term via cesarean section, Richard W. Hartmann, Jr, MD, and J. Christiane Salansky, MD, of Halifax Medical Center, Daytona Beach, Fla, found no evidence of an external anal opening (A). A soft bulge was present at the anal site, and the external sphincter was palpable. The median raphe was thick; a drop of meconium was noted on the surface of the perineum midway from the anus to the base of the scrotum (B). The remainder of the examination findings were normal.