Appendiceal neoplasm risk associated with complicated acute appendicitis—a population based study

Purpose Appendiceal tumors are rare, but high neoplasm rates have been reported at interval appendectomy after periappendicular abscess. Non-operative management of uncomplicated acute appendicitis has shown promising results. The data on appendiceal tumor incidence and presentation among acute appe...

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Bibliographic Details
Published in:International journal of colorectal disease 2019-01, Vol.34 (1), p.39-46
Main Authors: Lietzén, Elina, Grönroos, Juha M., Mecklin, Jukka-Pekka, Leppäniemi, Ari, Nordström, Pia, Rautio, Tero, Rantanen, Tuomo, Sand, Juhani, Paajanen, Hannu, Kaljonen, Anne, Salminen, Paulina
Format: Article
Language:English
Subjects:
Acute Disease
Appendectomy
Appendiceal Neoplasms - epidemiology
Appendiceal Neoplasms - etiology
Appendiceal Neoplasms - pathology
Appendicitis
Appendicitis - complications
Appendix
Cancer
Female
Finland - epidemiology
Gastroenterology
Gastrointestinal cancer
Hepatology
Humans
Internal Medicine
Male
Medicine
Medicine & Public Health
Middle Aged
Nose
Oncology, Experimental
Original Article
Patients
Population studies
Population-based studies
Proctology
Risk Factors
Surgery
Tumors
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Summary:Purpose Appendiceal tumors are rare, but high neoplasm rates have been reported at interval appendectomy after periappendicular abscess. Non-operative management of uncomplicated acute appendicitis has shown promising results. The data on appendiceal tumor incidence and presentation among acute appendicitis patients is limited, especially in patient cohorts differentiating between uncomplicated and complicated acute appendicitis. Objective was to assess appendiceal tumor incidence and tumor association to appendicitis in patients with uncomplicated and complicated acute appendicitis. Methods This nationwide population-based registry study was conducted from 2007 to 2013. The Finnish Cancer Registry and the National Institute for Health Registry were used to combine data on all appendiceal tumors and acute appendicitis diagnosis with medical reports evaluated at eight study hospitals. Results Altogether, 840 appendiceal tumors were identified, and out of these, 504 patient reports were reviewed, including 472 patients in this study. Tumor was diagnosed at appendectomy for suspected acute appendicitis in 276 patients (58%). In the whole study, histologically acute appendicitis and tumor were both present in 53% ( n  = 250), and out of these, 41% ( n  = 102) were complicated and 59% ( n  = 148) uncomplicated acute appendicitis. The associated tumor risk was significantly higher in complicated acute appendicitis compared with uncomplicated cases (3.24% vs. 0.87%, p  
ISSN:0179-1958
1432-1262
DOI:10.1007/s00384-018-3156-x