title: Cervical ganglioneuroma in collision with a metastatic undifferentiated carcinoma.
abstract: Cervical ganglioneuromas are extremely rare with approximately six case reports. The current report highlights a unique collision tumor between a cervical ganglioneuroma and a metastatic undifferentiated carcinoma arising from a primary gingival mass. A 53-year-old male presented with a 2 cm left gingival mass that was excised and treated with systemic chemotherapy. Consequently, 9 months later, he developed a 3.2 cm left submandibular mass followed by recurrence of the left gingival mass. From the clinicopathologic perspective, this had to be separated from the differentials: ganglioneuroblastoma or metastatic involvement of a lymph node from primary gingival undifferentiated carcinoma.
authors.affiliation: Department of Pathology and Laboratory Medicine, Division of Hematology/Oncology, American University of Beirut Medical Center, Beirut, Lebanon.
authors.forename: Mark N
authors.initials: MN
authors.lastname: Jabbour
authors.affiliation: Department of Pathology and Laboratory Medicine, Division of Hematology/Oncology, American University of Beirut Medical Center, Beirut, Lebanon.
authors.forename: Ghazi S
authors.initials: GS
authors.lastname: Zaatari
authors.affiliation: Department of Internal Medicine, Division of Hematology/Oncology, American University of Beirut Medical Center, Beirut, Lebanon.
authors.forename: Ziad
authors.initials: Z
authors.lastname: Salem
authors.affiliation: Department of Pathology and Laboratory Medicine, Division of Hematology/Oncology, American University of Beirut Medical Center, Beirut, Lebanon.
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Khalifeh
keywords: Collision tumor; ganglioneuroma; metastatic undifferentiated carcinoma