Korean J Otolaryngol-Head Neck Surg.
2003 Jan;46(1):54-58.
Sinus CT Findings of Antrochoanal Polyp
- Affiliations
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- 1Department of Otorhinolaryngology-Head and Neck Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.
Abstract
- BACKGROUND AND OBJECTIVES
Antrochoanal polyp (ACP) is defined as a polyp that originates in the maxillary sinus and passes through the sinus ostia. Physical examination and radiologic findings are the two most important aspects in the diagnosis and treatment of ACPs. However, there have been little attempts to describe the OMU CT findings of ACPs. In this study, authors reviewed the preoperative OMU CT findings of ACPS. MATERIALS AND METHOD: A total of 21 patients without the history of any previous nasal operations were entered into the study. The following seven radiologic parameters were reviewed: presence of polyp, origin of ACP, identification of accessory ostium, destruction in the OMU area, bony changes of the medial maxillary sinus wall, shapes of ACP that extended into nasopharynx in relation with sinusitis. RESULTS: ACPs were classified into three stages according to the level of extension. Of those 21 patients, polyps were observed in 20 patients, destructive changes only in 2 patients and bony changes of the medial wall in 17 patients. Lobulated contour in shape was observed in 24% of the patients. CONCLUSION: ACP is originated in the maxillary sinus and it grows into the nasal cavity via the posterior fontanelle area. It may regress due to insufficient blood supply, but its shape is retained.
