Volume 36, Issue 11 pp. 2227-2235
Original Research

Value of Sonography in the Diagnosis of Sialolithiasis: Comparison With the Reference Standard of Direct Stone Identification

Miguel Goncalves MD

Corresponding Author

Miguel Goncalves MD

Department of Otorhinolaryngology and Head and Neck Surgery, University of Erlangen–Nuremberg, Erlangen, Germany

Address correspondence to Miguel Goncalves, MD, Department of Otorhinolaryngology and Head and Neck Surgery, University of Erlangen–Nuremberg, Waldstraße 1, 91054 Erlangen, Germany. E-mail: [email protected]Search for more papers by this author
Mirco Schapher MD

Mirco Schapher MD

Department of Otorhinolaryngology and Head and Neck Surgery, University of Erlangen–Nuremberg, Erlangen, Germany

Search for more papers by this author
Heinrich Iro MD

Heinrich Iro MD

Department of Otorhinolaryngology and Head and Neck Surgery, University of Erlangen–Nuremberg, Erlangen, Germany

Search for more papers by this author
Wolfgang Wuest MD

Wolfgang Wuest MD

Institute of Radiology, University of Erlangen–Nuremberg, Erlangen, Germany

Search for more papers by this author
Konstantinos Mantsopoulos MD

Konstantinos Mantsopoulos MD

Department of Otorhinolaryngology and Head and Neck Surgery, University of Erlangen–Nuremberg, Erlangen, Germany

Search for more papers by this author
Michael Koch MD

Michael Koch MD

Department of Otorhinolaryngology and Head and Neck Surgery, University of Erlangen–Nuremberg, Erlangen, Germany

Search for more papers by this author
First published: 27 May 2017
Citations: 34

Abstract

Objectives

The aim of this study was to assess the effectiveness of sonography for diagnosing sialolithiasis in comparison with the existing reference standard of direct identification of a stone.

Methods

A total of 659 glands with signs of obstructive sialadenopathy were evaluated retrospectively. Sonographic examinations of the large head salivary glands had been performed initially in all cases. Direct depiction of a stone during sialoendoscopy or transoral ductal surgery or observation of stone fragmentation with discharge of concrements after extracorporeal shock wave lithotripsy, was regarded as definitive evidence and as the reference standard for the presence of sialolithiasis. The sonographic results were compared with those for direct identification of stones.

Results

The sensitivity of sonography was 94.7%, with specificity of 97.4%, a positive predictive value of 99.4%, and a negative predictive value of 79.6%. Stones that were not diagnosed correctly on sonography were most often located in the distal area of the duct.

Conclusions

These results show that sialolithiasis can be diagnosed by sonography with a high degree of certainty. Sonography thus appears to be highly appropriate as the examination method of choice.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.