A 20-year-old man with no significant past medical history presents to the clinic with concerns about frequent sunburns

A 20-year-old man with no significant past medical history presents to the clinic with concerns about frequent sunburns and photophobia. He stated that since he was a child, he always needed to cover up his skin while in the sun. If he did not, then he would quickly develop sunburns that would eventually blister. On presentation, the patient has lentigos on his face, neck, and arms. He also has areas of xerosis and poikiloderma on his chest, abdomen, and back. Which of the following is the most likely diagnosis? Bloom syndrome Rothmund-Thomson syndrome Werner syndrome Xeroderma pigmentosum