Parotitis CT or MRI

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Parotitis Microchapters


Patient Information


Historical Perspective



Differentiating Parotitis from other Diseases

Epidemiology and Demographics

Risk Factors

Natural History, Complications and Prognosis


History and Symptoms

Physical Examination

Laboratory Findings



Medical Therapy


Primary Prevention

Cost-Effectiveness of Therapy

Future or Investigational Therapies

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Case #1

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Luke Rusowicz-Orazem, B.S.


CT Findings in Parotitis are dependent on the cause. They can include salivary duct stones, parotid gland swelling, malignant or benign neoplasia, markers of inflammation, parotid gland abscess, and lymphadenopathy. MRI images of parotitis reveal an enlarged parotid gland. The T2 signal is usually high for acute parotitis, but can vary between low-intermediate for recurrent parotitis depending on presence of fibrosis.

Key CT Findings in Parotitis[1]

Key MRI Findings in Parotitis

  • Parotitis MRI findings are based on visible enlargement of the parotid gland[3]
  • The following signal characteristics are present in MRI images of parotitis:[4]
    • T2:
      • Acute parotitis: high signal
      • Recurrent parotitis: low-to-intermediate signal due to the possibility of fibrosis

CT Examples of Parotitis


  1. "Parotid enlargement | Radiology Reference Article |".
  2. Brook I (1992). "Diagnosis and management of parotitis". Arch. Otolaryngol. Head Neck Surg. 118 (5): 469–71. PMID 1571113.
  3. "Sialadenitis | Radiology Reference Article |".
  4. Kaneda T, Minami M, Ozawa K, Akimoto Y, Kawana T, Okada H, Yamamoto H, Suzuki H, Sasaki Y (1996). "MR of the submandibular gland: normal and pathologic states". AJNR Am J Neuroradiol. 17 (8): 1575–81. PMID 8883659.
  5. 5.0 5.1 5.2 "".

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