RT Journal Article SR Electronic T1 Peritonsillar abscess may not always be a complication of acute tonsillitis: A prospective cohort study JF bioRxiv FD Cold Spring Harbor Laboratory SP 2020.01.09.900068 DO 10.1101/2020.01.09.900068 A1 Sanmark, Enni A1 Wikstén, Johanna A1 Välimaa, Hannamari A1 Aaltonen, Leena-Maija A1 Ilmarinen, Taru A1 Blomgren, Karin YR 2020 UL http://biorxiv.org/content/early/2020/01/09/2020.01.09.900068.abstract AB The present study aimed to specify diagnostics for peritonsillar abscesses (PTAs) and to clarify the role of minor salivary glands. This prospective cohort study included 112 patients with acute tonsillitis (AT) and PTA recruited at a tertiary hospital emergency department between February and October 2017. All patients completed a questionnaire concerning their current disease. Serum amylase (S-Amyl) and C-reactive protein (S-CRP) levels, tonsillar findings, and pus aspirate samples and throat cultures were analyzed. Eight of 58 PTA patients (13.8%) had no signs of tonsillar infection. The absence of tonsillar erythema and exudate was associated with low S-CRP (p<0.001) and older age (p<0.001). We also observed an inverse correlation between S-Amyl and S-CRP levels (AT, r= −0.519; PTA, r= −0.353). Therefore, we observed a group of PTA patients without signs of tonsillar infection who had significantly lower S-CRP levels than other PTA patients. These findings support that PTA may be caused by an etiology other than AT. Variations in the S-Amyl levels and a negative correlation between S-Amyl and S-CRP levels may indicate that minor salivary glands are involved in PTA development.LEVEL OF EVIDENCE 1b(PTA)Peritonsillar abscess(AT)acute tonsillitis(GAS)Group A streptococcus(FN)Fusobacterium necrophorum(SAG)Streptococcus anginosus group(ID)incision and drainage