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Retroperitoneal fibrosis; Retroperitoneal lymph node dissection; It is also possible to have a neoplasm in this area, more commonly a metastasis; or very rarely a primary neoplasm. The most common type is a sarcoma followed by lymphoma, extragonadal germ cell tumor, and gastrointestinal stromal tumor/GIST. [9] Examples of tumors include:
An abdominal mass is any localized enlargement or swelling in the human abdomen.Depending on its location, the abdominal mass may be caused by an enlarged liver (hepatomegaly), enlarged spleen (splenomegaly), protruding kidney, a pancreatic mass, a retroperitoneal mass (a mass in the posterior of the peritoneum), an abdominal aortic aneurysm, or various tumours, such as those caused by ...
If frankly malignant, the tumor is a cancer for which additional cancer staging applies. [ citation needed ] Teratomas are also classified by their content; a solid teratoma contains only tissues (perhaps including more complex structures); a cystic teratoma contains only pockets of fluid or semifluid such as cerebrospinal fluid , sebum , or ...
The following is a list of cancer types. Cancer is a group of diseases that involve abnormal increases in the number of cells, with the potential to invade or spread to other parts of the body. [1] Not all tumors or lumps are cancerous; benign tumors are not classified as being cancer because they do not spread to other parts of the body. [1]
The retroperitoneum or retroperitnium is an anatomical region that includes the peritoneum-covered organs and tissues that make up the posterior wall of the abdominal cavity and the pelvic space - which extends behind to the abdominal cavity.
However, the diagnosis of DDL is supported in individuals: whose tumors contain ALT/WDL admixed with DDL histological components; with histories of having a prior ALT/WDL; [8] or who present with a retroperitoneal liposarcoma (DDL constitutes ~57% of all retroperitoneal liposarcomas). DDL tumors only rarely (<1% of cases) present as superficial ...
Thus, the life of a fetus in fetu is akin to that of a tumor in that its cells remain viable by way of normal metabolic activity. However, without the gestational conditions in utero with the amnion and placenta , a fetus in fetu can develop into, at best, an especially well differentiated teratoma ; or, at worst, a high-grade metastatic ...
Pneumoperitoneum is pneumatosis (abnormal presence of air or other gas) in the peritoneal cavity, a potential space within the abdominal cavity.The most common cause is a perforated abdominal organ, generally from a perforated peptic ulcer, although any part of the bowel may perforate from a benign ulcer, tumor or abdominal trauma.