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Ultrasonographic echogenicity of normal salivary glands in adults: comparison of submandibular and parotid glands

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Abstract
Purpose: The normal submandibular gland (SMG) and parotid gland (PG) are thought to have similar homogeneous ultrasound (US) hyperechogenicity; however, this has not been extensively investigated. The aim of this study was to determine whether the normal SMG and PG have similar US echogenicity.

Methods: We included 969 consecutive adult patients with normal salivary glands. The patients were categorized into three age groups: group 1 (19 to 29 years, n=27), group 2 (30 to 49 years, n=273), and group 3 (≥50 years, n=669). The echogenicities of the SMG and PG were prospectively evaluated by an experienced radiologist. Computed tomography (CT) attenuation in Hounsfield units (HUs) was quantitatively measured for the SMG, PG, and sternocleidomastoid muscle in 140 patients.

Results: Relative to the PG, the echogenicity of the SMG was similar in 706 (73.0%) and homogeneously hypoechoic in 263 patients (27.0%). The frequency of SMG hypoechogenicity decreased with increasing age (group 1, 59.3%; group 2, 36.3%; group 3, 22.1%; P<0.001). The CT attenuation levels (in HUs) of the SMG and PG were significantly higher in patients with hypoechoic SMGs than in patients with SMG echogenicity similar to that of the PG (P<0.001).

Conclusion: Hypoechogenicity of the SMG was observed in approximately one-third of this sample of adults with normal salivary glands. The SMG may be inadequate as a reference standard for evaluating thyroid nodule echogenicity in patients with diffuse thyroid disease with decreased echogenicity.
Author(s)
나동규백우열최인식
Issued Date
2021
Type
Article
Keyword
Submandibular glandParotid glandThyroid glandUltrasonography
DOI
10.14366/usg.20070
URI
https://oak.ulsan.ac.kr/handle/2021.oak/7370
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_nrf_kci_oai_kci_go_kr_ARTI_9796790&amp;context=PC&amp;vid=ULSAN&amp;lang=ko_KR&amp;search_scope=default_scope&amp;adaptor=primo_central_multiple_fe&amp;tab=default_tab&amp;query=any,contains,Ultrasonographic%20echogenicity%20of%20normal%20salivary%20glands%20in%20adults:%20comparison%20of%20submandibular%20and%20parotid%20glands&amp;offset=0&amp;pcAvailability=true
Publisher
ULTRASONOGRAPHY
Location
대한민국
Language
한국어
ISSN
2288-5919
Citation Volume
40
Citation Number
3
Citation Start Page
342
Citation End Page
348
Appears in Collections:
Medicine > Medicine
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