What's the difference between rare and uncommon?

Rare


Definition:

  • (a.) Early.
  • (superl.) Nearly raw; partially cooked; not thoroughly cooked; underdone; as, rare beef or mutton.
  • (superl.) Not frequent; seldom met with or occurring; unusual; as, a rare event.
  • (superl.) Of an uncommon nature; unusually excellent; valuable to a degree seldom found.
  • (superl.) Thinly scattered; dispersed.
  • (superl.) Characterized by wide separation of parts; of loose texture; not thick or dense; thin; as, a rare atmosphere at high elevations.

Example Sentences:

  • (1) Guillain BarrĂ© syndrome following herpes zoster is rare and only 25 cases have been reported to date.
  • (2) Hypothyroidism complicated by spontaneous hyperthyroidism is an interesting but rare occurrence in the spectrum of autoimmune thyroid disorders.
  • (3) Oculomotor paresis with cyclic spasms is a rare syndrome, usually noticeable at birth or developing during the first year of life.
  • (4) The frequency of rare fragile sites was studied among 240 children in special schools for subnormal intelligence (IQ 52-85).
  • (5) Surgical repair of the rheumatologic should however, is performed rarely, and should be reserved for the infrequent cases that do not respond to medical therapy.
  • (6) Cor triatriatum (CT) is a rare congenital defect, surgically correctable, and sometimes difficult to diagnose by cardiac catheterization.
  • (7) During this period he developed autoimmune haemolytic anaemia, a rare complication of myelofibrosis.
  • (8) One rare case of blind-ending branch originating in the upper third of the ureter are described.
  • (9) This analysis demonstrated that more than 75% of cosmids containing a rare restriction site also contained a second rare restriction site, suggesting a high degree of CpG-rich restriction site clustering.
  • (10) These are rare tumours comparable to abdominal desmoid tumours.
  • (11) They can rarely be detected spontaneously but most often are provoked.
  • (12) A rare case of an extradural brucellosis granuloma in the thoracic region is presented.
  • (13) Massive osteoplastic bone tumor in hepatocellular carcinoma is very rare.
  • (14) Aneurysmal bone cyst is an uncommon benign lesion that rarely presents in the craniofacial region.
  • (15) Axons emerge from proximal dendrites within 50 microns of the soma, and more rarely from the soma, in a tapering initial segment, commonly interrupted by one or two large swellings.
  • (16) Useful studies on the relationship between these acute lesions and peptic ulceration are rare.
  • (17) calcium tung-state, rare-earths compounds, double halogenides.
  • (18) Spontaneous reports of suspected adverse reactions may be the only way of revealing very rare events but they present great difficulties of rational interpretation.
  • (19) Metastatic tumors of the small bowel from extra-abdominal sites are rare.
  • (20) Perinephric abscess is a rare condition; it may be acute, but can take a chronic and atypical course as a result of incomplete treatment with antibiotics.

Uncommon


Definition:

  • (a.) Not common; unusual; infrequent; rare; hence, remarkable; strange; as, an uncommon season; an uncommon degree of cold or heat; uncommon courage.

Example Sentences:

  • (1) Periosteal chondroma is an uncommon benign cartilagenous lesion, and its importance lies primarily in its characteristic radiographic and pathologic appearance which should be of assistance in the differential diagnosis of eccentric lesions of bones.
  • (2) Patients with sarcoidosis that present only cutaneous lesions are uncommon but have been described.
  • (3) Leprosy is an uncommon disease in Saudi population.
  • (4) Three diagnoses or less per patient were not uncommon; more than three diagnoses per patient were uncommon.
  • (5) Aneurysmal bone cyst is an uncommon benign lesion that rarely presents in the craniofacial region.
  • (6) We conclude that inflammatory lesions at these sites are not uncommon and that CT scans are diagnostic in the great majority.
  • (7) It is uncommon in children and usually associated with disease not localised to the gallbladder.
  • (8) The peculiar aspects of uncommon causes of IVH are discussed on the basis of a review of the literature.
  • (9) Although uncommon, the occurrence of seizures and elevated aminotransferase values are potentially serious side effects of clomipramine.
  • (10) ST-segment elevation is an uncommon finding in these patients and does not reliably differentiate those with and without fixed CAD.
  • (11) Substantial variations were identified in the point of origin of 6 of 41 arterial branches; extra vessels and absence of vessels were uncommon.
  • (12) When arterial lines are maintained for even a few days, it is not uncommon that some form of complication develops at the arterial site, such as redness, inflammation, positional problems, or even infection.
  • (13) Efferent units with spontaneous activity were uncommon at the start of the recording sessions but were more frequently encountered later in the experiments.
  • (14) While acromioclavicular joint injury is not uncommon, a complete posterior dislocation in which the distal clavicle penetrates and is entrapped by the trapezius muscle is among the most rare.
  • (15) D. latum infection has been an uncommon intestinal parasitosis, but it tends to increase nowadays.
  • (16) Sudden death in healthy athletes is uncommon but, when it occurs, the primary mechanism is cardiovascular.
  • (17) The literature on this uncommon syndrome was reviewed and it was found that there are an open prevalence of this entity in children younger than 15 years, as well as severe respiratory complications in affected patients.
  • (18) It is not uncommon for thyrotoxicosis to appear in an atypical manner in older patients.
  • (19) Foregut cysts are uncommon congenital defects of the developing airway and gut.
  • (20) Strains of this phage type were uncommon among patients attending the casualty department, and those found were usually either fully sensitive to antibiotics or resistant to benzylpenicillin only.