Cysts are fluid-filled sacs that form in skin or body. Most cysts are non-cancerous and can appear anywhere. Common locations include skin, ovaries, breasts, kidneys and vagina
Ovarian torsion occurs when ovary twists around supporting ligaments. Commonly seen in women with ovarian cysts and longer ligaments. Can be caused by assisted reproductive technologies and pregnancy
Normal spleen diameter up to 10 cm and perpendicular diameter up to 6 cm. Healthy spleen shows density around 45 HU on non-enhanced CT. Contrast-enhanced arterial phase shows heterogeneous enhancement pattern
Bosniak classification categorizes renal cysts based on CT imaging findings. System ranges from simple (I) to cystic neoplasm (IV). Classification allows standardization and categorization of lesions
Cyst is a closed sac with distinct envelope and abnormal cell division. Can contain air, fluids, or semi-solid material. May resolve on its own or require surgical removal
Hydatid disease is caused by tapeworms of genus Echinococcus. Three main species: E granulosus (cystic), E multilocularis (alveolar), E vogeli. Humans act as accidental intermediate hosts in life cycle