Free on board (FOB) is a contractual term that refers to the requirement that the seller deliver goods at the seller's cost via a specific route to a destination designated by the buyer. How It Works To understand how FOB terms work, let's look at an example.
A kidney cyst or renal cyst, is a fluid collection within the kidney. Most kidney cysts are âsimpleâ or âbenignâ meaning no treatment is required. Some cysts are more âcomplexâ and require either close radiographic imaging (with either a CT scan or MRI) or surgery since these cysts can be cancerous.
Complex kidney cysts are so-called because of their irregular shape. Another difference between simple and complex cysts is that complex kidney cysts often have âenhancedâ tissue, meaning that within the cyst, there is tissue that has access to a blood supply. Most of the time simple cysts are asymptomatic and are not harmful. Sometimes, they may cause pain if cysts enlarge to the point where they encroach on other organs. In other cases they may become infected or may bleed. It is rare for simple kidney cysts to cause any reduction in kidney function. However, there is a link between simple kidney cysts and high blood pressure, although it is unknown whether the link is a causative link or simply correlation.