A 5-year-old child developed a traumatic intercostal pulmonary hernia after blunt trauma to the chest wall. The hernia healed spontaneously and the patient has remained well for six months.
Smith W, Stempel D. Spontaneous Healing of Traumatic Intercostal Pulmonary Hernia. Am J Dis Child. 1973;126(3):354–355. doi:10.1001/archpedi.1973.02110190312014