What's the difference between cyst and nodule?

Cyst


Definition:

  • (n.) A pouch or sac without opening, usually membranous and containing morbid matter, which is accidentally developed in one of the natural cavities or in the substance of an organ.
  • (n.) In old authors, the urinary bladder, or the gall bladder.
  • (n.) One of the bladders or air vessels of certain algae, as of the great kelp of the Pacific, and common rockweeds (Fuci) of our shores.
  • (n.) A small capsule or sac of the kind in which many immature entozoans exist in the tissues of living animals; also, a similar form in Rotifera, etc.
  • (n.) A form assumed by Protozoa in which they become saclike and quiescent. It generally precedes the production of germs. See Encystment.

Example Sentences:

  • (1) However it is important to recognize these cysts so that correct surgical management is offered to the patient.
  • (2) The increase in red blood cell mass was associated with an elevation in erythropoietic stimulatory activity in serum, pleural fluid, and tumor-cyst fluid as determined by the exhypoxic polycythemic mouse assay.
  • (3) Diagnostic work-up and management of intracranial arachnoid cysts are still controversial.
  • (4) The position of the cyst supports the theory that branchial cysts are congenital in origin.
  • (5) These cases show that an examination of the whole neuraxis is as important in patients with midline posterior fossa cysts as it is in patients with developmental syringomyelia or Chiari I malformation.
  • (6) The exception to this rule is a cyst which can be safely aspirated under controlled conditions.
  • (7) Aneurysmal bone cyst is an uncommon benign lesion that rarely presents in the craniofacial region.
  • (8) It is especially efficacious in evaluating patients with cystic lesions, especially those with complex cysts not clearly of water density.
  • (9) In cases in which CT was also performed, it revealed corresponding hypodensities in two infarctions, but failed to reveal the foci of gliosis (or noncavital infarction), demyelination, or brain cyst.
  • (10) This light microscopic comparison of viable FDA- and nonviable PI-stained cysts of G. muris demonstrates that 2 types of cysts can be distinguished and implies that structural differences can be used to identify these subpopulations of cysts.
  • (11) Quantitative measurements of image contrast were carried out for B-mode images of anechoic spheres (cysts) embedded in a random scattering medium.
  • (12) The resistance of GSA 65 to proteolytic degradation, together with previous immunofluorescence data that indicate the antigen is an integral part of the G. lamblia cyst wall, suggests that this molecule may play a role in maintaining the integrity of the cyst in vivo.
  • (13) Radiographic examination revealed that three of the cysts had increased is size, three had decreased in size, three had not changed in size, and two had disappeared; no evaluation could be made on two.
  • (14) Zinc alpha-2 glycoprotein (ZnGP) was measured in human breast microcysts, breast secretions, breast cyst fluid and serum.
  • (15) The diagnosis of meningeal cyst was confirmed in a non-invasive way by MRI showing a mass with the same signal intensities as CSF on both T1 and T2 weighted images.
  • (16) Furthermore, the different types of adrenal cysts reported in the literature and the differential diagnosis from other adrenal cystic lesions, mainly tumors and infections, are discussed.
  • (17) Splenectomy is the operation of choice for cysts of the spleen in children.
  • (18) The concentration of potassium (K+) and sodium (Na+) was measured in breast cyst fluid (BCF) from 611 cysts greater than 3 ml aspirated in 520 women with gross cystic disease of the breast.
  • (19) Although bronchogenic cysts may involve the mediastinum, they have rarely been responsible for significant upper airway obstruction.
  • (20) Radiographically the bone cyst distinguishes itself by its central localisation in the metaphysis, where as the giant cell tumor has an excentric position in the epiphysis with a tendency of extending into the metaphysis.

Nodule


Definition:

  • (n.) A rounded mass or irregular shape; a little knot or lump.

Example Sentences:

  • (1) This particular variant of rheumatoid arthritis (RA) is characterized by the presence of subcutaneous rheumatoid nodules, scanty or absent systemic manifestations and a clinically benign course.
  • (2) We identified four distinct clinical patterns in the 244 patients with true positive MAI infections: (a) pulmonary nodules ("tuberculomas") indistinguishable from pulmonary neoplasms (78 patients); (b) chronic bronchitis or bronchiectasis with sputum repeatedly positive for MAI or granulomas on biopsy (58 patients, virtually all older white women); (c) cavitary lung disease and scattered pulmonary nodules mimicking M. tuberculosis infection (12 patients); (d) diffuse pulmonary infiltrations in immunocompromised hosts, primarily patients with AIDS (96 patients).
  • (3) An umbilical nodule may be an early or late sign of metastasis from an internal location.
  • (4) Thus, multiparae had very thick border zones composed predominantly of large nodules and, additionally, of vacuolated cells and fibrous tissue.
  • (5) In two cases that showed punctate or linear low density structures adjacent to the distal side of the tumor nodules to the porta hepatis, a daughter nodule was detected by CT at 6.5 and 9.2 months, respectively, after the appearance of the low density structures.
  • (6) Based on their localisation and histology these are classified into three types (Epstein's pearls, Bohn's nodules, Dental lamina cysts).
  • (7) No infection threads were found to penetrate either root hairs or the nodule cells.
  • (8) Two-thirds of the respiratory infections occurred in the first 3 postoperative months and were generally localized processes (focal pneumonitis, nodule(s), abscess, or empyema).
  • (9) Differential degeneration of the lateral microvessels may account for increases in collagen nodule growth and ultimate size.
  • (10) In this study, six patients, the proband, his four siblings and a niece, representing a kindred of fifty-two subjects, were examined for aymptomatic cutaneous nodules mainly on the back and chest.
  • (11) Significantly higher levels of c-myc gene expression were observed in tissues of HCC of the DEN group and in neoplastic nodules of the DEN-DES groups than in the DES and DEN-C group.
  • (12) On siratro, CIAT899 induced nodules that were ineffective in acetylene reduction, whereas the EPS-deficient mutants induced effective nodules.
  • (13) Yellow lupin nodule specific sequences were selected by screening of cDNA library prepared from lupin nodule poly(A)+RNA.
  • (14) These were not seen after the 35th day, however an occasional lymph nodule persisted in the intersitium.
  • (15) However, there is no reported study which compares the long-term outcome of patients with vocal cord nodules treated surgically with those treated with a combination of surgery and speech therapy, and those treated only with speech therapy.
  • (16) Fine needle aspiration of the thyroid is suggested as an initial diagnostic procedure in the evaluation of thyroid nodules.
  • (17) Here a diaphragm support breath pattern was used in voice therapy for patients with vocal nodules, recurrent laryngeal nerve paralysis, and incomplete glottal closure.
  • (18) The development of the nodules did not seem to affect the hosts.
  • (19) Neoplastic nodules showed a variable pattern of enzyme activities.
  • (20) Negative slit smears for AFB from the nodules repeatedly and the histology of one on the skin nodules clinched the diagnosis of multicentric reticulohistiocytosis.