Alexander K. C. Leung, MD

September 14, 2005

Concerned parents sought evaluation of their 3-year-old daughter, whose developmental milestones were somewhat delayed. The child sat without support at 10 months of age and walked at 17 months of age.

September 14, 2005

This 6-year-old child presented with a painless mass on his lower lip. The mass had increased in size slowly during the previous 2 months.

September 14, 2005

These lesions are always present at birth. They consist of mature dilated capillaries and represent a permanent developmental defect. They are red to purple, macular, and sharply circumscribed. They are usually unilateral and may occur anywhere on the body, although they tend to favor the face. Unlike salmon patches, port-wine stains do not fade; in fact, they tend to darken and become nodular with age.

September 14, 2005

This obstruction results from hypertrophy of the circular and longitudinal muscularis of the pylorus and the distal antrum of the stomach. It occurs in approximately 3 of every 1000 live births and is 4 times more common in boys. Pyloric stenosis (PS) is relatively uncommon in African American and Asian infants. The observation that it occurs primarily in first-born infants has been disputed.

September 14, 2005

A 13-year-old girl was notably short and had short fourth metacarpals and metatarsals. She was very mildly mentally retarded.

September 14, 2005

A mass covered by a translucent membrane was found in the umbilical area of an infant born by cesarean section at 38 weeks' gestation to a 26-year-old gravida 3 para 2 mother.

September 14, 2005

For the past 3 years, a 17-year-old boy had experienced intermittent pain in the right knee. The pain worsened when he went up and down stairs, ran, jumped, or knelt.

September 14, 2005

This condition is characterized by a localized narrowing of the jejunum without a disruption of continuity or defect in the mesentery. At the stenotic site, there is often a short, narrow segment with a minute lumen where the muscularis is irregular and the submucosa is thickened. The resultant intestinal obstruction is incomplete.

September 14, 2005

Congenital adrenal hyperplasia is an autosomal recessive disorder. Deficiency of 21-hydroxylase accounts for 95% of all cases.

September 14, 2005

For the past 3 years, comedones, papules, pustules, and nodules had been erupting on the face of a 16-year-old boy. Acne vulgaris had been diagnosed. Topical tetracycline cream and oral tetracycline were used without success.