A closed sac or capsule, usually filled with fluid or semisolid material.

A swelling in the space behind the knee (the popliteal space) that is composed of a membrane-lined sac filled with synovial fluid that has escaped from the joint. Also known as synovial cyst of the popliteal space.

An inflammation of the oil gland of the eyelid. Also known as chalazion or tarsal cyst.

An abscess that occurs in the cleft between the buttocks. Pilonidal cysts form frequently in adolescence after long trips that involve sitting, and they may be painful. Treatment frequently involves surgery if not responsive to heat applications and antibiotics.

A sebaceous cyst is a rounded swollen area of the skin formed by an abnormal sac of retained excretion (sebum) from the sebaceous follicles.

A swelling in the space behind the knee (the popliteal space). The swelling is composed of a membrane-lined sac filled with synovial fluid that has escaped from the joint. Commonly called Baker's cyst.

Also called a chalazion or a Meibomian cyst, an inflammation of the oil gland of the eyelid.

A fluid-filled sac that is present at birth and located in the midline of the neck. A thyroglossal cyst is a congenital malformation (a birth defect). It results from incomplete closure of a segment of the thyroglossal duct, a tube-like structure that normally closes as the embryo develops. Also called a thyroglossal duct cyst or a thyrolingual cys [..]

See: Thyroglossal cyst.

A closed, sac-like pocket of tissue that can form anywhere in the body. It may be filled with fluid, air, pus, or other material. Most cysts are benign (not cancer).

an abnormal sac containing gas, fluid, or a semisolid material.

1) a hollow space or fluid-filled cavity surrounded by a distinct lining that develops abnormally in tissue or in an organ in the body, such as "ovarian cyst" 2) a cellular form of a parasite that has a thick cell wall, which allows for survival of the parasite in the environment and transmission into an uninfected host

Pathological cavity, usually lined with epithelium, containing fluid or soft matter.

any closed epithelium-lined cavity or sac, normal or abnormal, usually containing liquid or semisolid material; a bladder.

1713, from Modern Latin cystis (in English as a Latin word from 1540s), from Greek kystis "bladder, pouch."

A fluid-filled sac.

n. A small, capsule-like sac that encloses an organism in its resting or larval stage, e.g., a resting spore of an alga.

An enclosed sac that is filled with liquid or semi-solid matter.

The swollen, egg-containing female body of certain nematodes. Can be seen on the outside of infected roots.

cyst (pop)

A sac or capsule filled with fluid.

The larval stage of the pork tapeworm, which lodges in the various tissues.

(French : kyste) Abnormal closed cavity, of various sizes in which there is a liquid collection of infectious or embryological origin.

a sac in the body-tissue filled with fluid (sometimes diseased)

A sac or pocket in the body containing fluid or semisolid material.

A fluid-filled sac that is usually benign (non-cancerous). The fluid can be removed for analysis. (See

An abnormal growth in the body that is noncancerous.

sac containing fluid

An accumulation of fluid or semisolid material within a sac.

An abnormal closed cavity or sac in the body, lined by walls called epithelium and containing a liquid or semisolid material.

A membranous sac-like structure containing fluid (19thC)

An accumulation of fluid or semisolid material within a sac.

A cyst is a sac that is filled with air, liquid, or pus. Cysts can happen in different parts of the body. They can get infected and then hurt or swell. Some kids who have acne may have cysts in their [..]

A cyst is a collection of fluid, that can occur in the the breast and in other areas of the body. Cysts are harmless; they do not cause cancer and are not indicative of cancer. They are thought to occ [..]

Any fluid-filled closed cavity or sac that is lined by an Epithelium. Cysts can be of normal, abnormal, non-neoplastic, or neoplastic Tissues.

Fibrous Blood-filled Cyst in the bone. Although benign it can be destructive causing Deformity and fractures.

A Tumor derived from branchial Epithelium or branchial Rests. (Dorland, 27th ed)

A fluid-filled closed cavity or sac that is lined by an Epithelium and found in the Breast. It may appear as a single large Cyst in one Breast, multifocal, or bilateral in Fibrocystic Breast Disease.

A usually spherical Cyst, arising as an embryonic out-pouching of the foregut or Trachea. It is generally found in the mediastinum or Lung and is usually asymptomatic unless it becomes infected.

A mixed radiolucent-radiopaque lesion of the Jaws with features of both a Cyst and a solid Neoplasm. It is characterized microscopically by an epithelial lining showing a palisaded layer of columnar b [..]

Benign, congenital, neuroepithelial Cysts that are typically filled with a viscous Mucus. They usually arise in the anterior portion of the Third Ventricle between the fornices.

Characterized by the fusiform or saccular Dilatation of the Common Bile Duct.

A congenital anatomic malformation of a Bile Duct, including cystic Dilatation of the Extrahepatic Bile Duct or the large Intrahepatic Bile Duct. Classification is based on the site and type of Dilata [..]

Most common follicular Odontogenic Cyst. Occurs in relation to a partially erupted or Unerupted Tooth with at least the Crown of the Tooth to which the Cyst is attached protruding into the Cystic cavi [..]

A Tumor consisting of displaced ectodermal structures along the lines of embryonic fusion, the wall being formed of Epithelium-lined Connective Tissue, including Skin appendages, and containing Kerati [..]

A cystic dilation of the Epididymis, usually in the head portion (caput Epididymis). The Cyst Fluid contains dead Spermatozoa and can be easily differentiated from Testicular Hydrocele and other testi [..]

Any fluid-filled closed cavity or sac (Cysts) that is lined by an Epithelium and found in the Esophagus region.

Cyst due to the occlusion of the duct of a follicle or small gland.

Liver Disease caused by Infections with parasitic Tapeworms of the genus Echinococcus, such as Echinococcus granulosus or Echinococcus multilocularis. Ingested Echinococcus ova burrow into the Intesti [..]

An Infection caused by the infestation of the larval form of Tapeworms of the genus Echinococcus. The liver, Lungs, and Kidney are the most common areas of infestation.

Characterized by the presence of a singular or multiple intrahepatic Cysts.

Saccular lesions lined with Epithelium and contained within pathologically formed cavities in the jaw; also nonepithelial Cysts (pseudoCysts) as they apply to the jaw, e.g., traumatic or Solitary Cyst [..]

Intracranial or spinal cavities containing a cerebrospinal-like fluid, the wall of which is composed of Arachnoidal Cells. They are most often developmental or related to Trauma. Intracranial Arachnoi [..]

Cystic mass containing Lymph from diseased Lymphatic channels or following surgical Trauma or other injury.

Cysts of one of the parts of the mediastinum: the superior part, containing the Trachea, Esophagus, Thoracic Duct and Thymus organs; the inferior middle part, containing the Pericardium; the inferior [..]

A non-neoplastic Cyst of the Meibomian Glands of the eyelid.

A rare intra-abdominal Tumor in the Mesentery. Mesenteric Cysts are usually benign and can be very large fluid-filled (2000 mL) lesions.

Characterized by the presence of multiple extrahepatic and intrahepatic Cysts.

A disorder characterized by multiple, wide spread cutaneous Cysts that often become inflamed and Rupture. It is caused by the same Mutations in the Gene coding for KRT-17 that are causative Mutations [..]

Nodular Tumor-like lesions or mucoid flesh, arising from Tendon sheaths, Ligaments, or Joint Capsule, especially of the hands, Wrists, or Feet. They are not true Cysts as they lack epithelial wall. Th [..]

Cysts formed from epithelial inclusions in the lines of fusion of the embryonic processes which form the Jaws. They include nasopalatine or incisive canal Cyst, incisive papilla Cyst, globulomaxillary [..]

Cysts found in the Jaws and arising from Epithelium involved in Tooth formation. They include Follicular Cysts (e.g., primordial Cyst, Dentigerous Cyst, multilocular Cyst), lateral Periodontal Cysts, [..]

General term for Cysts and cystic Diseases of the Ovary.

A true Cyst of the Pancreas, distinguished from the much more common Pancreatic Pseudocyst by possessing a lining of mucous Epithelium. Pancreatic Cysts are categorized as congenital, Retention, neopl [..]

A Cyst (Cysts) near the Ovary, derived from anomalies of the Fallopian Tubes or the Broad Ligament. The paramesonephric type consists of ciliated Cells similar to the Oviduct Epithelium. The mesonephr [..]

An Epithelium-lined sac containing fluid; usually found at the apex of a pulp-involved Tooth. The lateral type occurs less frequently along the side of the root.

A Hair-containing Cyst or sinus, occurring chiefly in the coccygeal region.

A Synovial Cyst located in the back of the knee, in the popliteal space arising from the semimembranous bursa or the knee joint.

Helminth Infection of the Lung caused by Echinococcus granulosus or Echinococcus multilocularis.

Slow-growing fluid-filled epithelial sac at the apex of a Tooth with a nonvital pulp or defective root canal filling.

Perineurial Cysts commonly found in the SACRAL REGION. They arise from the PERINEURIUM Membrane within the Spinal Nerve Roots. The distinctive feature of the Cysts is the presence of Spinal Nerve Root [..]

Intradermal or subcutaneous saclike structure, the wall of which is stratified Epithelium containing keratohyalin granules.

Non-neoplastic Tumor-like lesions at joints, developed from the Synovial Membrane of a joint through the Joint Capsule into the periarticular Tissues. They are filled with Synovial Fluid with a smooth [..]

A Cyst in the neck caused by persistence of portions of, or by lack of closure of, the primitive thyroglossal duct. (Dorland, 27th ed)

Cyst occurring in a persistent portion of the Urachus, presenting as an extraperitoneal mass in the umbilical region. It is characterized by Abdominal Pain, and Fever if infected. It may Rupture, lead [..]

An abnormal fluid filled lump or sack-like fluid filled growth that's usually harmless.

A closed, fluid-filled growth in otherwise normal tissue.

An accumulation of fluid or semisolid material within a sac.

An abnormal membranous sac containing a gaseous, liquid, or semisolid substance. Cystitis

The resting stage of some margarodoids that develops after the first instar and before the adult female. It lacks legs and has reduced antennae. 

A strong protective covering on a microbe present during its dormant stage. Read about the cysts of Cryptosporidium

An abnormal sac or closed cavity in the body filled with liquid or semi-solid material.

a vesting stage formed by some bacteria and protozoa wherein entire cell is surrounded by a protective layer

a sac containing a dormant animal. a sac of morbid matter in plant or animal tissue.

A microorganism with a tough protective covering.

 A fluid filled sac.

A cyst is a thin, fluid-filled sac that can appear on the gum tissue, roof of the mouth or lips. A cyst may go away on its own or may have to be evaluated by a dentist or specialist to determine if it [..]

An abnormal lump or swelling sac-like structure, filled with fluid or semi-solid cheesy material, in any body organ or tissue.  

Widespread intestinal parasite that causes diarrheal illness in people. Cysts are extremely small; they are about ten times smaller than the smallest object that can be seen with the naked eye. When c [..]

A self-contained sac of fluid or semifluid matter that is formed in human or animal tissue.

A deep lesion filled with pus or fluids.

A closed sac or capsule usually filled with fluid or semisolid material.

The swollen, egg-containing female body of certain nematodes. Can be seen on the outside of infected roots.

A lump filled with either fluid or soft material, occurring in any organ or tissue; may occur for a number of reasons but is usually harmless unless its presence disrupts organ or tissue function.

A closed sac or capsule usually filled with fluid or semisolid material.

A fluid-filled cavity that forms where cells have died. The cyst is often surrounded by a glial scar.

Abnormal sac containing liquid or semi-solid matter.

A pouch or sac without opening, usually membranous and containing morbid matter, which develops in one of the natural cavities or in the substance of an organ. (medicine) Of or pertaining to the u [..]

A sac surrounded by a membrane; may or may not cause health problems. top

A fluid filled structure found anywhere in the body. In reproductive medicine we primarily refer to them in the ovaries. Ovarian cysts may be normal or abnormal depending on the circumstances. Often times they are just follicles that have not been fully reabsorbed from previous menstrual or treatment cycles.  

A sac or capsule in the body. It is usually filled with fluid or other material.

A closed sac or pouch in the body containing fluid or semisolid material.

A fluid filled lump, usually harmless, associated with fibrocystic condition. The fluid can usually be drained by aspiration. Cyst Aspiration