Rheumatoid arthritis is not associated with prior tonsillectomy or appendectomy

Area of Science:

• Rheumatology
• Immunology
• Epidemiology

Background:

• Previous research suggested a potential association between rheumatoid arthritis (RA) and antecedent tonsillectomy or appendectomy.
• The etiological factors of RA remain incompletely understood, prompting investigation into environmental influences.

Purpose of the Study:

• To rigorously re-evaluate the reported association between rheumatoid arthritis (RA) and prior lymphoid surgeries, specifically tonsillectomy and appendectomy.
• To determine if these surgical procedures are risk factors for developing RA.

Main Methods:

• A postal questionnaire survey was administered to 3673 patients diagnosed with either RA or osteoarthrosis (OA).
• Comparative analysis of prior tonsillectomy and appendectomy frequencies was conducted between RA and OA patient groups, including rheumatoid factor (Rf)-positive and Rf-negative subgroups.
• A matched case-control analysis was performed on a subgroup of Rf-positive RA patients.

Main Results:

• No statistically significant differences in the frequency of prior tonsillectomy or appendectomy were observed between RA and OA patient groups.
• Analysis of Rf-positive and Rf-negative RA subgroups, as well as a matched subgroup, also revealed no significant association with antecedent lymphoid surgery.
• Partitioning the data by the age of lymphoid surgery did not uncover any link to an increased occurrence of RA.

Conclusions:

• The study provides strong evidence refuting the hypothesis that RA is associated with antecedent tonsillectomy or appendectomy.
• The findings suggest that lymphoid surgery is unlikely to be a significant risk factor for the development of rheumatoid arthritis.