A cyst is a sac-like pocket of membranous tissue that contains fluid, air, or other substances. Cysts can grow almost anywhere in the body or under the skin. There are many different types of cysts. Most cysts are benign (non-cancerous). Whether a cyst needs treatment depends on a number of factors, including the type of cyst, the location, if the cyst is causing pain or discomfort, and whether the cyst is infected.
The scalp refers to the layers of skin and tissue that cover the head. Cutaneous (skin) nodules are abnormal growths of tissue on or in the skin. They may be non-cancerous (e.g. lipoma, cyst, abscess, hematoma) or malignant (cancerous).
Sometimes when fat cells are injured (e.g. car collision, surgery), the cells can liquify and the body forms scar tissue around it. This can show up as a lump, and sometimes can cause physical discomfort.
A collapsed, or incompletely distended bladder, indicates that at the time of MRI examination, the bladder was not full of urine. This finding does not indicate any underlying condition.
The gallbladder contracts ("shrinks") when it releases bile, and then relaxes, returning to its usual size - this physiologic process can show a "contracted gallbladder" on radiologic imaging. Sometimes, a contracted gallbladder can be caused by chronic inflammation (e.g. symptomatic gallstones) causing gallbladder scarring and a permanently smaller-than-usual gallbladder.
A complex liver cyst is a cyst (fluid pocket) with debris containing fluid, solid components (nodularity), internal walls (septations) and/or thickened walls.
