1. Adenosquamous Carcinoma of Ampulla of Vater—a Rare Entity
   Suvendu Maji et al, 2021, Indian Journal of Surgical Oncology CrossRef
2. Ampulla of Vater metastasis from squamous cell carcinoma of the esophagus
   Jun Hyuk Son et al, 2021, International Journal of Gastrointestinal Intervention CrossRef
3. Rare common bile duct metastasis of breast cancer: A case report and literature review
   Jie Tang et al, 2021, World Journal of Gastrointestinal Oncology CrossRef
4. Duodenal Papillary Metastasis of Lung Cancer with Bleeding Controlled by Endoscopic Treatment and Systemic Osimertinib Therapy: Case Report
   Taiyo Hirata et al, 2024, Case Reports in Gastroenterology CrossRef
5. A Case of Breast Cancer Metastasizing to the Ampulla of Vater
   Matthew Tjahja et al, 2024, Cureus CrossRef