Image evaluation of suprazygomatic masticator space lesions.

W. H. Yuan*, M. M. Teng, H. C. Hsu, S. S. Chen, J. F. Lirng, F. C. Chang, C. B. Luo, W. Y. Guo, J. H. Chiang, C. Y. Chang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


In order to understand lesions involving the suprazygomatic masticator space (SZMS) demonstrated on computered tomography (CT) or magnetic resonance (MR) images, we collected 45 cases of lesions in SZMS. There were hematomas in 26 cases, tumors in 16 cases, and abscesses in 3 cases. The location of these lesions in compartments of the SZMS and adjacent structures was analyzed. Most commonly hematoma was found in the deep loose connective tissue (80.8%), followed by the superficial dense connective tissue (61.5%). Only 2 SZMS hematoma involved the superficial fat pad. Five patients had air accumulation in the SZMS, and all were in the deep fat pad and with maxillary sinus fracture. Of the sixteen cases which were tumors, 12 were extended from adjacent structures, and four were primary tumor. In cases of tumor, compartments of SZMS involved most frequently were temporal muscles (15 of 16 cases), followed by deep fat pad (8 of 16 cases). The connective tissue layer of SZMS is a communication pathway for superficial spread of infection, hematoma, or tumor invasion to or from the scalp and face. Compartments of deep fat pad and temporal muscle are also pathways for the spread of disease to or from the face, intracranium and orbit. The primary tumors in infratemporal fossa and SZMS are rare. Malignant tumors in SZMS usually come from surrounding spaces.

Original languageEnglish
Pages (from-to)139-149
Number of pages11
JournalThe Kaohsiung journal of medical sciences
Issue number3
StatePublished - Mar 2001


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