Acute sternal subluxation in an indoor cat.

A 1-year-old spayed female cat was presented with tachypnea and a protrusion on the ventral thorax. Radiography revealed ventral sternal subluxation between the 6th and 7th sternebrae. There was no evidence of respiratory distress, even after follow-up, and a conservative management approach was successful in this healthy, young, indoor cat.