Affects 60-70% of hand and wrist soft tissue masses. Most common between 20-50 years. 70% occur on dorsal wrist, 20% on volar wrist. 10% found in other joints like hip, knee, ankle
Ganglion cyst is a fluid-filled capsule that forms on hand or wrist. Arises from synovial fluid leaking from wrist joints or tendon sheaths. Most common cause of hand lump, not cancerous and non-spreading. Wrist arthroscopy increases risk by eight times, especially in females
Thyroid colloid cysts are noncancerous nodules filled with stored thyroid hormone. About 60% of adults have thyroid nodules, 95% are noncancerous. Nodules can be completely fluid-filled or partially fluid with solid areas
Bosniak classification system helps sort kidney cysts by cancer risk. System was developed by Dr. Morton Bosniak and widely accepted worldwide. Proper classification improves treatment planning and reduces wrong surgeries
Bartholin glands are located in vulvar vestibule, secreting mucus for lubrication. Most common masses are cysts or abscesses, abscesses three times more common. Benign tumors and carcinomas are rare
Pineal gland cyst is a benign fluid-filled body in the brain's pineal gland. Found in 1-4% of MRI scans and 4-11% of autopsies. 2007 study showed 23% frequency with mean diameter of 4.3 mm