Usefulness of Magnetic Resonance Sialography for the Evaluation of Radioactive Iodine-Induced Sialadenitis

Jeong Seok Choi, Hyun Gon Lim, Young Mo Kim, Myung Kwan Lim, Ha Young Lee, Jae Yol Lim

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Purpose: Radioactive iodine (RAI) ablation therapy after thyroidectomy commonly leads to obstructive sialadenitis. Magnetic resonance (MR) sialography is an emerging imaging modality that enables morphological and functional changes to be evaluated. This study was conducted to investigate the usefulness of MR sialography for the evaluation of RAI sialadenitis. In addition, the authors evaluated the correlation of MR sialographic grading with symptom severity using a symptom questionnaire (SQ), and salivary gland (SG) functions as determined by salivary flow rates (SFRs) and salivary scintigraphy (SSG) parameters. Methods: Eighteen patients with RAI sialadenitis who underwent MR sialography imaging were retrospectively enrolled. Subjective symptom scores were assessed and objective SG functions were evaluated. MR sialographic characteristics were analyzed and correlations between MR sialographic findings and clinicopathologic data, SQ, SFRs, and SSG parameters were investigated. Results: MR sialography demonstrated diagnostic findings of ductal stenosis and sialectasis, non-visualized ducts, and glandular atrophy mainly involving parotid glands. A significant correlation was found between obstructive symptom scores and ductal stenosis and sialectasis grades (both p < 0.05). Degrees of ductal stenosis and sialectasis were significantly correlated with SSG excretory variables [time from stimulation to minimum count (tmin) and maximum secretion; all p < 0.05]. Significant linear correlations were found between duct nonvisualization and uptake variables [uptake ratio (UR) and maximum accumulation (MA); both p < 0.05]. Glandular volumes were also significantly correlated with UR and MA (both p < 0.05). Conclusions: MR sialography images are useful for evaluating RAI sialadenitis, and its findings are in accordance with disease severity. An MR sialographic grading system is suggested to describe the severity of obstructive sialadenitis and SG dysfunction.

Original languageEnglish
Pages (from-to)1007-1013
Number of pages7
JournalAnnals of surgical oncology
Publication statusPublished - 2015 Dec 1

Bibliographical note

Funding Information:
This research was supported by an Inha University research grant.

Publisher Copyright:
© 2015, Society of Surgical Oncology.

All Science Journal Classification (ASJC) codes

  • Surgery
  • Oncology


Dive into the research topics of 'Usefulness of Magnetic Resonance Sialography for the Evaluation of Radioactive Iodine-Induced Sialadenitis'. Together they form a unique fingerprint.

Cite this