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• A to Z: Pulmonary Artery Sling

  With this condition, an artery carrying blood from the heart to the lungs can form a sling around the windpipe and block air flow. Learn more about it here.

• A to Z: Pulmonic Valvular Stenosis

  Learn about this congenital heart defect that alters blood flow through the heart and lungs and can affect a child’s growth and circulation.

• A to Z: Purpura, Allergic

  See: Henoch-Schönlein Purpura (HSP).

• A to Z: Purpura, Anaphylactoid

  See: Henoch-Schönlein Purpura (HSP).

• A to Z: Purpura, Henoch-Schönlein (HSP)

  See: Henoch-Schönlein Purpura (HSP).

• A to Z: Purpura, Schönlein-Henoch

  See: Henoch-Schönlein Purpura (HSP).

• A to Z: Pyelonephritis

  Learn more about pyelonephritis and how it’s treated.

• A to Z: Pyloric Stenosis

  Pyloric stenosis is a condition that happens during infancy, and affects the lower part of the stomach.

• A to Z: Pyogenic Arthritis (Septic Arthritis)

  Pyogenic, or septic, arthritis is a serious and painful infection of a joint. It’s most common in children from birth to age 3 and older adults.