| Tornwaldt's cyst | <anatomy> A cystic notochordal remnant found inconstantly in the posterior wall of the nasopharynx at the lower end of the pharyngeal tonsil. Synonym: bursa pharyngea, Luschka's bursa, Tornwaldt's cyst. (05 Mar 2000) |
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| endometrial cyst | A cyst resulting from endometrial implantation outside the uterus, as in endometriosis. (05 Mar 2000) |
| endothelial cyst | A serous cyst whose sac is lined with endothelium. (05 Mar 2000) |
| traumatic bone cyst | A unilocular cyst containing serous fluid and lined with a thin layer of connective tissue, occurring usually in the shaft of a long bone in a child. Synonym: idiopathic bone cavity, osteocystoma, simple bone cyst, traumatic bone cyst, unicameral bone cyst. (05 Mar 2000) |
| ependymal cyst | A circumscribed distention of some portion of the central canal of the spinal cord or of the cerebral ventricles. Synonym: neural cyst. (05 Mar 2000) |
| trichilemmal cyst | A common cyst of the skin and subcutis which contains sebum and keratin, and is lined by pale-staining stratified epithelial cells derived from follicular trichilemma. Synonym: trichilemmal cyst. (05 Mar 2000) |
| epidermal cyst | Intradermal or subcutaneous saclike structure, the wall of which is stratified epithelium containing keratohyalin granules. (12 Dec 1998) |
| epidermoid cyst | A closed sac (sebaceous gland) within the tissue containing oily or fatty semi-solid material. These cysts are found most commonly on the genitalia, vulva or labia. Features include a nontender, small lump in the skin. Sebaceous cysts which turn red or tender may require treatment with oral antibiotics. Warm wet compresses may help the cyst expel some of its contents. Surgical excision of the cyst may be necessary to prevent recurrence. (27 Sep 1997) |
| epidermoid inclusion cyst | <radiology> Well-circumscribed radiolucent lesion showing a thin cortical margin that may not be visible in its entirety, frequently in the terminal phalanx, history of penetrating trauma is often elicited Differential diagnosis: ABC, enchondroma (12 Dec 1998) |
| epithelial cyst | A cyst lined with epithelium. (05 Mar 2000) |
| eruption cyst | A form of dentigerous cyst in the soft tissues in conjunction with an erupting tooth; seen on the alveolar ridge of children. (05 Mar 2000) |
| tubular cyst | A cyst formed by the dilation of any occluded canal or tube. Synonym: tubular cyst. (05 Mar 2000) |
| junctional cyst | A cyst of the testis arising from the structures connecting the rete testis with the epididymis. (05 Mar 2000) |
| extravasation cyst | An obsolete term for haemorrhagic cyst. (05 Mar 2000) |
| exudation cyst | A cyst resulting from distention of a closed cavity, such as a bursa, by an excessive secretion of its normal fluid contents. (05 Mar 2000) |