Alexander K. C. Leung, MD

September 14, 2005

A male infant was born to a 29-year-old woman (gravida 3, para 2), following an uncomplicated pregnancy and normal vaginal delivery. At birth, a brownish 1-cm nodule was noted on the right side of the upper abdomen. The infant was otherwise healthy.

September 14, 2005

A 2-year-old girl presented with a 2-day history of urinary frequency and dysuria. Physical examination revealed complete fusion of the labia minora. Urine culture showed Escherichia coli with a colony count of 108/L. The child was treated with a 10-day course of amoxicillin that resulted in complete clearance of the urinary tract infection.

September 14, 2005

Two years ago, Dr Alexander K. C. Leung reported on a case of pseudopseudohypoparathyroidism. The patient was a 13-year-old girl with short stature, short fourth metacarpals and metatarsals, mild mental retardation, and no identifiable biochemical abnormalities.

September 14, 2005

A 6-year-old boy had a nonpruritic rash on his back for 10 days. There was no associated fever. The child's mother had placed a bandage over the lesions to prevent transmission to her other children.

September 14, 2005

Five days before this 1-year-old girl was brought to her doctor's office, a rash had developed on her left shoulder and the left side of her chest. The abrupt onset of a high fever (temperature, 41°C [105.8°F]) and irritability accompanied the outbreak of the rash. The child had a history of asthma and eczema.

September 14, 2005

This 14-year-old boy presented with slowly progressive hypopigmented lesions that had been present on the lower extremities for the previous 2 years.

September 14, 2005

A 45-year-old man sought medical advice after suffering for 6 months with recurrent pain and a purulent discharge at the sacrococcygeal region. Two weeks before this consultation, an abscess on the patient's right buttock had been drained by another physician. The patient had insulin-dependent diabetes mellitus for 5 years; his medical history was otherwise unremarkable.

September 14, 2005

This disorder occurs in fetal development, when the midgut supplied by the superior mesenteric artery grows too rapidly to be accommodated in the abdominal cavity. Prolapse into the umbilical cord occurs around the sixth week of gestation. Between the tenth and eleventh weeks, the midgut retracts from its location at the exocelomic umbilical stalk back into the abdominal cavity. During this return, the midgut undergoes a 270-degree counterclockwise rotation about the axis of the superior mesenteric artery, followed by fixation to the posterior abdominal wall. Malrotation results from failure of the midgut to properly rotate and affix itself to this wall. This disorder occurs approximately once in 500 live births.

September 14, 2005

A 12-year-old boy was brought to his physician because of a tensely cystic mass in the right side of the scrotum. The spermatic cord could be felt above and below the lump. It had no cough impulse.

September 14, 2005

After 3 months of seeing this painless mass at the angle of the 3-year-old's left jaw, his parents sought medical advice for their son. The youngster had no constitutional symptoms. A Mantoux test was performed, and an erythematous, indurated area measuring 15 mm in diameter was found at the test site 48 hours later.