Case ReportPublished 9 October 2026Expect the unexpected: cervical gastric-type adenocarcinoma in situ in a patient with long-standing Peutz-Jeghers syndrome — a case report and literature reviewShuo Xu · Xinjun Li · Xiangnan Zhang · Shengpu WangFrontiers in Medicinedoi 10.3389/fmed.2026.1944455