Nontraumatic rupture of the costal margin: a single-center experience.

Background: Rupture of the costal margin is uncommon. Whilst most often seen after major trauma, we describe its occurrence in patients with no direct chest trauma.
Methods: A search was performed in our thoracic surgery database for all patients with rupture of the costal margin. Patients were excluded if the injury was a result of trauma. Data were collected on sex, age, body mass index, profession, past medical history, smoking status, presenting complaint, mechanism of injury, and management.
Results: There were 9 patients with rupture of the costal margin that was caused in all cases by a severe coughing fit. All patients were male and the mean age was 62.5 years (range 47-76 years). Chronic obstructive pulmonary disease was present in 6 cases. Presentations included a palpable defect (5 cases), cough (9 cases), and chest pain (6 cases). On radiological examination, all patients had widening of the rib space, 4 had associated rib fractures, and 5 had lung herniation. Time from injury to presentation was 12 months (range 1-24 months). All patients underwent surgery and were followed-up for 59 months (range 8-129 months). Two patients suffered major complications in the immediate postoperative period.
Conclusions: Rupture of the costal margin, in the absence of direct trauma, is characterized by pain, a palpable defect, and lung herniation. It is associated with widening of the rib space and rib fractures, and can be treated surgically with success but not without significant risks.