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Dentomaxillofacial Radiology (2009) 38, 480-483
© 2009 British Institute of Radiology
doi: 10.1259/dmfr/48774803

RESEARCH

Prevalence and risk factors of mucous retention cysts in a Brazilian population

CD Rodrigues1, GF Freire1, LB Silva2, MM Fonseca da Silveira2 and C Estrela*,3

1Brazilian Dentistry Association, Brasília, DF, Brazil; 2University of Pernambuco, Recife, PE, Brazil; 3Federal University of Goiás, Goiânia, GO, Brazil

*Correspondence to: Carlos Estrela, Centro de Ensino e Pesquisa Odontológica do Brasil, Avenida C-198, Quadra 487, Lote 9, Jardim América, Goiânia, GO, CEP: 74.270-040, Brazil; E-mail: estrela3{at}terra.com.br

Received 18 August 2008; revised 21 September 2008; accepted 20 October 2008

Objectives: The aim of this study was to estimate the prevalence and analyse the risk factors of mucous retention cysts (MRCs) of the maxillary sinus.

Methods: From November 2002 to May 2007, 6293 panoramic radiographs were taken and retrospectively reviewed to estimate the prevalence of MRCs and to analyse risk factors (month, relative air humidity and mean temperature). The months in which MRCs occurred were recorded and analysed. The Spearman rank correlation coefficient was used to correlate MRCs with relative air humidity, environmental temperature and month (significance level R2>0.85).

Results: Of the 6293 radiographs analysed, 201 (3.19%) images were suggestive of MRCs. No significant correlation was found between MRCs and relative humidity (R2 = 0.15) of the air or temperature (R2 = 0.40). The months with the highest numbers of MRC cases were September, October and November.

Conclusions: The prevalence of MRCs was low, and no statistical correlation was found between MRCs and relative humidity of the air, mean temperature or month.

Keywords: mucous retention cyst, cyst, panoramic radiograph, differential diagnosis, maxillary sinus






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