Retroperitoneal Teratoma in an Adult With Carcinoid as the Main Component

Retroperitoneal rekürren matür kistik teratom zemininde gelişen nöroendokrin tümör

“…Particularly these cases are originated from gonadal regions. Primary retroperitoneal teratomas associated with neuroendocrine tumors are extremely rare [7][8][9][10] (Table 1). To the best of our knowledge presented case is the fifth case in the literature.…”

Incidental large retroperitoneal teratoma in a patient with colorectal carcinoma

“…They can have virtually any tissue type. While the majority present congenitally in the sacrococcygeal region, they have been identified in other areas such as the mediastinum, head and neck, oropharynx and the retroperitoneum . Macroscopically, there are two variants.…”

“…Primary retroperitoneal teratomas are exceedingly rare, constituting 1–11% of all teratomas. Approximately half of all retroperitoneal teratomas present in the first decade of life, with <5% presenting in adulthood . The frequency of malignancy increases with age .…”