Acute Calcific Tendinitis of the Longus Colli with Trismus: MRI Findings Suggestive of Inflammatory Extension to the Lateral Pterygoid Muscle
Abstract
A 48-year-old woman presented with acute right-sided neck pain and a trismus. Plain and contrast-enhanced computed tomography revealed prevertebral calcification at the atlantoaxial level and retropharyngeal edema without rim enhancement, consistent with acute calcific tendinitis of the longus colli muscle. Magnetic resonance imaging (MRI) revealed signal hyperintensity in the right lateral pterygoid muscle without diffusion restriction. Moreover, MRI suggested inflammatory involvement of the right lateral pterygoid muscle as a possible mechanism of trismus. Symptoms resolved rapidly following the administration of non-steroidal anti-inflammatory drugs and acetaminophen. MRI may help clarify the mechanism underlying trismus in acute calcific tendinitis of the longus colli.
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BibTeX
@article{kanagaki2026acute,
title = {{Acute Calcific Tendinitis of the Longus Colli with Trismus: MRI Findings Suggestive of Inflammatory Extension to the Lateral Pterygoid Muscle}},
author = {Hiromi Kanagaki and Yu Nakanishi and Ryo Takimoto},
journal = {Internal Medicine},
year = {2026},
month = oct,
doi = {10.2169/internalmedicine.7922-26},
url = {https://www.jstage.jst.go.jp/article/internalmedicine/advpub/0/advpub_7922-26/_article},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Acute Calcific Tendinitis of the Longus Colli with Trismus: MRI Findings Suggestive of Inflammatory Extension to the Lateral Pterygoid Muscle
AU - Hiromi Kanagaki
AU - Yu Nakanishi
AU - Ryo Takimoto
PY - 2026
DA - 2026/10/29
JO - Internal Medicine
DO - 10.2169/internalmedicine.7922-26
UR - https://www.jstage.jst.go.jp/article/internalmedicine/advpub/0/advpub_7922-26/_article
AB - A 48-year-old woman presented with acute right-sided neck pain and a trismus. Plain and contrast-enhanced computed tomography revealed prevertebral calcification at the atlantoaxial level and retropharyngeal edema without rim enhancement, consistent with acute calcific tendinitis of the longus colli muscle. Magnetic resonance imaging (MRI) revealed signal hyperintensity in the right lateral pterygoid muscle without diffusion restriction. Moreover, MRI suggested inflammatory involvement of the right lateral pterygoid muscle as a possible mechanism of trismus. Symptoms resolved rapidly following the administration of non-steroidal anti-inflammatory drugs and acetaminophen. MRI may help clarify the mechanism underlying trismus in acute calcific tendinitis of the longus colli.
SN - 1349-7235
SN - 0918-2918
ER -