Is oncocytoma malignant?
An oncocytoma is a tumor made up of oncocytes, epithelial cells characterized by an excessive amount of mitochondria, resulting in an abundant acidophilic, granular cytoplasm. The cells and the tumor that they compose are often benign but sometimes may be premalignant or malignant….
| Oncocytoma | |
|---|---|
| Specialty | Oncology |
What causes renal oncocytoma?
When renal oncocytomas are part of a genetic syndrome, they are caused by changes ( mutations ) in a specific gene . Tuberous sclerosis complex is caused by mutations in the TSC1 gene or TSC2 gene, while Birt-Hogg-Dube syndrome is caused by mutations in the FLCN gene.
What is a tumor Pseudocapsule?
Definition: Imaging appearance of a “capsule” around a mass when no true tumor capsule is present at histological evaluation.
What is renal adenoma?
Renal adenomas are rare, benign, epithelial neoplasms composed of proliferations of renal cortical epithelial cells, most often reported in dogs, cats, and horses.
What are the symptoms of oncocytoma?
Renal oncocytomas are often asymptomatic and are frequently discovered by chance on a CT or ultrasound of the abdomen. Possible signs and symptoms of a renal oncocytoma include blood in the urine, flank pain, and an abdominal mass.
Should renal oncocytoma be removed?
Do benign kidney tumors need to be removed? Renal oncocytomas that don’t grow or cause problems may not need treatment. Your healthcare provider may recommend surgery if the diagnosis is uncertain or you have symptoms.
How common is renal oncocytoma?
Renal oncocytomas are common benign kidney neoplasms that account for 3 to 7 percent of renal neoplasms. They usually occur in adults, most frequently in the seventh decade of life. Renal oncocytomas may be discovered incidentally or may be diagnosed with biopsy or excision.
What does Pseudocapsule mean?
Noun. pseudocapsule (plural pseudocapsules) A structure, similar to a capsule, that surrounds some carcinomas quotations ▼
What is the difference between capsule and Pseudocapsule?
A rim of increasing enhancement in the portal venous phase or delayed phase around a mass at imaging is termed “capsule appearance”. It may represent a true tumor capsule or a pseudocapsule. Imaging does not reliably differentiate between a true tumor capsule and a pseudocapsule.