PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “Retroperitoneal Neoplasms”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 73 records · Page 4Linked to original sources
PubMed1981

Adrenal myelolipoma simulating a retroperitoneal malignant neoplasm.

We describe a case of a large myelolipoma (15 by 12 cm. maximum diameter) that was removed surgically and resembled clinically and semeiologically a malignant retroperitoneal tumor. The patient also had chronic pancreatitis and cholelithiasis. Experimental findings, as well as the frequent association of myelolipomas (usually small) with several chronic diseases, suggests that the adrenal myelolipoma is not a true neoplasm but, rather, a choristoma or, perhaps even more likely, a hyperplastic and/or metaplastic lesion.

Adrenal Gland Neoplasms↗
PubMed2002

[Perinephric liposarcoma mimicking cystic renal tumor].

Liposarcoma is one of the most common primary retroperitoneal neoplasms, and the perinephric region is a frequent location for them. Liposarcomas show a variety of radiographic features in terms of histological types and tumor sizes, so the specific diagnosis of liposarcoma is often difficult. We present a unique case of perinephric dedifferentiated liposarcoma mimicking cystic renal tumor. A 71-year-old man presented himself at our hospital with a palpable mass in his upper right abdomen. Abdominal computerized tomography (CT) revealed a well-defined cystic mass at the lower pole of the right kidney that contained heterogeneous solid components and small foci of fat. There were no signs of lymphadenopathy or tumor thrombus in the renal vein. Metastatic evaluation by chest x-ray and bone scan was negative. The probable diagnosis was cystic renal cell carcinoma or atypical angiomyolipoma. Because we could not exclude the possibility of cystic malignancy, a right radical nephrectomy was performed. Grossly, the tumor was predominantly encapsulated by a unilocular fibrous capsule and was filled with bloody fluid and debris. The anterior portion of the tumor was composed of various-sized soft and rubbery masses covered with necrotic tissue. The histological diagnosis was dedifferentiated liposarcoma arising in the perinephric retroperitoneum with extensive necrosis, and the cyst wall was composed of a necrotic tumor with a well differentiated liposarcoma and a fibrous capsule. Although the tumor widely covered the right kidney, there was no microscopic invasion of the kidney. No signs of tumor recurrence were noted six months after the operation.

Aged↗
PubMed1981

Liposarcoma: the Manitoba experience.

In a retrospective review all cases of liposarcoma recorded in the province of Manitoba from 1944 to 1978 were studied. There were 104 patients. Follow-up was obtained in all. Sites of tumour were peripheral limb in 45 patients, limb girdle in 15, retroperitoneal area in 23 and trunk and neck in 21. Fifty-seven percent of the patients were men: the disease was most commonly found in patients aged 50 to 69 years. Initial treatment was excision in 96 patients with irradiation in 26 and chemotherapy in 6. The 5- and 10-year survival rates were 60% and 49% respectively. In those who had definitive surgery the prognosis was somewhat better, while radiotherapy had little beneficial effect. Prognosis was also related to the pathologic type; well differentiated and myxoid types had a better prognosis than round cell or pleomorphic tumours. Trunk and peripheral limb tumours were associated with higher survival rates than limb girdle or retroperitoneal neoplasms. At least 37 patients had local recurrences; distant metastases occurred in at least 26, most commonly to the lungs, bones and liver. Unusual cases consisted of a patient with a multicentric tumour involving bones, a young boy with a neck liposarcoma and a woman with a breast liposarcoma.

Adolescent↗
PubMedDate not supplied

Calcified retroperitoneal fibroma.

A case of 31-year-old male with a retroperitoneal tumor is described. Abdominal ultrasound revealed a left para-aortic calcific mass, adjacent to the left lobe of the liver and to the upper pole of the left kidney. A CT-scan of the abdomen showed the mass to originate from the left adrenal gland. At operation, a large, retroperitoneal mass, adherent to the left kidney and the spleen, but not infiltrating, was excised. Histologically the tumor was diagnosed as a calcified osteo-producing fibroma. Benign retroperitoneal tumors represent about 25% of all retroperitoneal neoplasm. This reported case represents a retroperitoneal tumor of slow growth and benign clinical course whose characteristic consists of the heavy calcifications which are normally absent in a fibroma type mass.

Adult↗
PubMed1986

Magnetic resonance imaging in the evaluation of the retroperitoneum.

Magnetic resonance imaging techniques have made it possible to delineate a variety of pathologic processes in the retroperitoneum, including lymphadenopathy, atherosclerotic and aneurysmal disease of the aorta, congenital venous anomalies, and primary and secondary retroperitoneal neoplasms. The availability of multiplanar image display, the excellent soft tissue contrast resolution, and the fact that exogenous contrast materials are not needed are valuable assets of this imaging modality.

Arteries↗
PubMed1965

HEMANGIOPERICYTOMA.

Explore the source record for details and available documents.

Abdominal Neoplasms↗