Dermatofibroma are common benign skin tumours that cause lumps in the skin and frequently cause concern upon discovery. The causes of dermatofibroma may include a reaction to trauma such as insect bites but the precise cause is often unclear.
Complex Renal Cysts. Kidneys are bean shaped organs and are an important part of the urinary system. The main function of the kidneys is to eliminate waste and toxins from the body. Sometimes due to over accumulation of toxins or calcium deposits, cysts can form in the kidneys.
Signs and Symptoms. Kidney cysts usually do not cause any symptoms. Simple kidney cysts may cause complications like: 1  Abdominal or lumbar pain: due to the displacement of abdominal organs, rupture or bleeding of the renal cyst. 2  Hematuria: due to rupture of a renal cyst into the pyelocaliceal system.igns and Symptoms. Kidney cysts usually do not cause any symptoms. Simple kidney cysts may cause complications like: 1  Abdominal or lumbar pain: due to the displacement of abdominal organs, rupture or bleeding of the renal cyst. 2  Hematuria: due to rupture of a renal cyst into the pyelocaliceal system.