Many types of cysts are not neoplastic, they are dysplastic or metaplastic. Pseudocysts are similar to cysts in that they have a sac filled with fluid, but lack an epithelial lining. Terminology
microcyst – a small cyst that requires magnification to be seen
macrocyst – a cyst that is larger than usual or compared to others

Related structures
A pseudocyst is very similar to a cyst, but is a collection of cells without a distinct membrane (epithelial or endothelial cells). A syrinx in the spinal cord or brainstem is sometimes inaccurately referred to as a "cyst".
Renal cyst (kidneys)
Pancreatic cyst
Peritoneal inclusion cyst (lining of the abdominal cavity) - It is a cluster of fluid-filled cysts lining the abdominal cavity of reproductive age women with a history of pelvic, abdominal surgeries, or abdominal inflammation. Those affected maybe presented with an abdominal, pelvic, lower back that lasted for months. Enteric duplication cyst

Central nervous system
Choroid plexus cyst
Colloid cyst
Pineal gland cyst (in the pineal gland in the brain)
Glial cyst
Tarlov cyst (spinal canal)

Musculoskeletal system
Aneurysmal bone cyst, a benign bone tumor with a radiographic cystic appearance. Bakers cyst or popliteal cyst (behind the knee joint)
Mucoid cyst (ganglion cysts of the digits)
Stafne static bone cyst (an anatomic variant with radiographic cystic appearance in the posterior mandible)
Subchondral cyst (cysts near the bony joints)

Seen in various locations
Dermoid cyst (seen in ovaries, testes, and many other locations, from head to tailbone)
Ganglion cyst (hand and foot joints and tendons)
Mucoid cyst (ganglion cysts of the digits)

Infectious cysts
Cysticercal cyst – an infection due to the larval stage of Taenia sp. (Crains backs)
Hydatid cyst – an infection in the liver or other parts of the body due to the larval stage of Echinococcus granulosus (tapeworm)

Neoplastic cysts
Dermoid cyst
Keratocystic odontogenic tumor
Calcifying odontogenic cyst

Treatment
Treatment ranges from simple enucleation of the cyst to curettage to resection. There are cysts—e.g., buccal bifurcation cyst—that resolve on their own, in which just close observation may be employed, unless it is infected and symptomatic.