The main theme recurs as a leitmotif in multiple tracks. Dilation may be repeated if narrowing recurs. However, the condition often recurs following treatment. The condition usually recurs throughout a person's lifetime. As dysplasia recurs Daltrey has regular checks to monitor his condition. Despite maximum treatment, the cancer usually recurs. This motif recurs when he considers sparing Hector, whom he loves and respects. Stem cell transplantation may be used if the disease recurs following standard treatment. If unsuccessful or the PSVT recurs diltiazem or verapamil are recommended. More extensive surgery may be required if the disease recurs. One persistent misunderstanding recurs in discussion of semantics - the confusion of words and meanings. After a period of peace, the cycle recurs. The disease eventually recurs, becoming resistant to available therapies. Whether physically or emotionally, death recurs throughout this novel. Particularly, Skyler Wexler often recurs as Sarah's daughter Kira.