What's the difference between incidental and intervenient?

Incidental

Definition:

Example Sentences:

(1) Weddellite calcification was associated with benign lesions in 16 cases, but incidental atypical lobular hyperplasia and lobular carcinoma in situ were present, each in one case.
(2) The remaining case had a calibre persistent submucosal artery within the caecum that was found incidentally in a resection specimen.
(3) No increased incidence of pancreas divisum was found in any of four groups: an incidental group, a group with alcoholic pancreatitis, a group with unexplained upper abdominal pain, and an idiopathic pancreatitis group.
(4) (Incidentally, Australia had just revoked Blanc’s visa).
(5) We concluded that this case was incidentally successful with good regeneration of urethral mucosa of the anterior urethra by grafting a polytetrafluoroethylene tube.
(6) Whether the incidentally reported increase in multiword responses in some normal elderly forecasts an approaching dementia needs further research.
(7) As predicted, the blocking effect was found to be smaller in subjects who displayed a high degree of incidental learning in either of two tasks in which intentional vs. incidental learning corresponded to (1) words vs. word position, or (2) a target initial word letter vs. non-target initial letters.
(8) Unresolved etiological issues requiring clarification in the near future include the following: (1) Are stressful events important in the development of panic, or are they more incidentally related?
(9) We report on a 47-year-old man with a granular cell tumour of the appendix, discovered incidentally during surgery for a rectal adenocarcinoma that had been irradiated preoperatively.
(10) Incidental teaching and traditional discrete-trial procedures were used to teach two children with autism the expressive use of two color adjectives to describe preferred toys and food items.
(11) Ninety patients with a visually normal opposite ovary had no identifiable tumor in that ovary by investigative incision or incidental excision.
(12) It was intended, however, as a response to more radical reforms proposed by congressman Justin Amash, a Republican from Michigan, and is likely to have relatively limited impact on the NSA's ability to collect data on US citizens through incidental means, the so-called backdoor provisions , which was seen as a bigger threat as Snowden's revelations continued.
(13) The markedly dilated main pancreatic duct was noticed at the time of an incidental ultrasonogram during hospitalization for diabetes mellitus.
(14) Our data suggest that the risk for development of a wound infection after a staging laparotomy for Hodgkin's disease is increased by performing an incidental appendectomy as part of the procedure.
(15) 10.21am GMT Incidentally, we've just learned that September was a less cheery month for the eurozone.
(16) Ductal carcinoma in situ as an incidental finding may be treated by excision alone; papillary and micropapillary DCIS are best treated by therapy aimed at the entire breast, although axillary dissection may not be required.
(17) Nonfatal complications specifically related to splenectomy occurred in 15 per cent of patients with multi-organ injury and in 18 per cent of patients with incidental-accidental splenic removal.
(18) The use of other techniques, such as a gated blood pool scanning or computerized tomography, affects primarily the incidental discovery of a "silent" tumor.
(19) We report two patients receiving maintenance valproate, one with resolving acute hepatitis C and the other with chronic persistent hepatitis C, with incidental microvesicular steatosis demonstrated on oil-red O stains.
(20) It is recommended that incidental teaching procedures be included in future language development programs for children with autism.