Kidney Pain

Learn about kidney pain.


An angiomyolipoma is a benign neoplasm of the kidney. This tumor is made of various amounts of fat, smooth muscle, and vascular elements. Kidney pain is one possible symptom of this condition.


Cases of angiomyolipoma tend to be asymptomatic, more often than they do display any. In roughly 60 percent of cases there are none that are detected. However, in cases that involve tuberous sclerosis (TS), a considerable majority of the patients with larger tumors -- equal or greater than four centimeters -- did have symptoms. Those with TS but smaller tumors still tended to be asymptomatic. Symptoms related to retroperitoneal or intratumoral are common possibilities. Some symptoms related to TS include weight loss, high blood pressure, nausea, and fever.


Some are isolated, but others are associated with tuberous sclerosis. Such a tumor is thought to come in above 50 percent of persons with this condition. Also, it is considered to form in 40 percent of women who have lymphangioleiomyomatosis, which is a rare type of cystic lung disease.

Diagnosis and differential diagnosis

Various examination methods can be used, including CT scan, MRI, angiography, and others. Other medical issues that can be considered as potential differential diagnoses include renal lipoma, oncocytoma, and renal cell carcinoma, amongst others.


If the tumor does not present symptoms, it can often be given conservative treatment methods. Two factors considered for prescribing a treatment method include symptoms and the size of the tumor. Some options that a doctor may suggest include continued checks, embolization, or either a partial or total removal of the kidney (nephrectomy).