Previous case reports suggest that cardiac ablation has not always been successful in DD patients,[10,18] possibly due to the diffuse fibrosis that is resistant to treatment.[3] In Case 2, a limitation exists in that the patient’s LAMP2 gene can be clearly defined as a deletion in exon 1, but the information about the specific missing base has been lost for too long and the patient’s family was unable to provide it. The gene discussed is LAMP2; the disease is dentin dysplasia.