Any fluid-filled closed cavity or sac that is lined by an epithelium. Cysts can be of normal, abnormal, non-neoplastic, or neoplastic tissues. [MeSH] Pathology.—A cyst is any round circumscribed space that is surrounded by an epithelial or fibrous wall of variable thickness (51). BI-RADS MRI: Circumscribed, round or oval fluid-filled mass with an imperceptible wall, bright on T2-weighted images. Radiographs and CT scans.—A cyst appears as a round parenchymal lucency or low-attenuating area with a well-defined interface with normal lung. Cysts have variable wall thickness but are usually thin-walled (<2 mm) and occur without associated pulmonary emphysema (Fig 21). Cysts in the lung usually contain air but occasionally contain fluid or solid material. The term is often used to describe enlarged thin-walled airspaces in patients with lymphangioleiomyomatosis (52) or Langerhans cell histiocytosis (53); thicker-walled honeycomb cysts are seen in patients with end-stage fibrosis (54). (See also bleb, bulla, honeycombing, pneumatocele.) [Fleischner Society] [PI-RADS] On MR: A circumscribed T2 hyperintense fluid containing sac-like structure.

http://www.radlex.org/RID/RID3890

Any fluid-filled closed cavity or sac that is lined by an epithelium. Cysts can be of normal, abnormal, non-neoplastic, or neoplastic tissues. [MeSH] Pathology.—A cyst is any round circumscribed space that is surrounded by an epithelial or fibrous wall of variable thickness (51). BI-RADS MRI: Circumscribed, round or oval fluid-filled mass with an imperceptible wall, bright on T2-weighted images. Radiographs and CT scans.—A cyst appears as a round parenchymal lucency or low-attenuating area with a well-defined interface with normal lung. Cysts have variable wall thickness but are usually thin-walled (<2 mm) and occur without associated pulmonary emphysema (Fig 21). Cysts in the lung usually contain air but occasionally contain fluid or solid material. The term is often used to describe enlarged thin-walled airspaces in patients with lymphangioleiomyomatosis (52) or Langerhans cell histiocytosis (53); thicker-walled honeycomb cysts are seen in patients with end-stage fibrosis (54). (See also bleb, bulla, honeycombing, pneumatocele.) [Fleischner Society] [PI-RADS] On MR: A circumscribed T2 hyperintense fluid containing sac-like structure.

RID3890

http://www.radlex.org/RID/RID35434

http://www.radlex.org/RID/RID35238

http://www.radlex.org/RID/RID35491

http://www.radlex.org/RID/RID35413

http://www.radlex.org/RID/RID35256

http://www.radlex.org/RID/RID35625

http://www.radlex.org/RID/RID34297

cyst

RID1:RID3890

cyst

07/07/2014 source

BI-RADS 5, MeSH, BI-RADS 4, LI-RADS, Playbook, Fleischner Society, PI-RADS

C0010709

http://www.radlex.org/RID/RID3873