PMC7433264_01
Axial non-contrasted computed tomography demonstrates a large, multiseptated focal collection of gas in the subcutaneous tissue overlying the left parotid gland (white arrowhead). Underlying communication with branching gas pattern in the ductal system of the left parotid gland is shown (black arrow). No gas is present in the parapharyngeal fat space or deep neck spaces.
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F0001
Non-contrast CT of the head and neck (performed with the patient under conscious sedation) demonstrated a circumscribed focus of subcutaneous surgical emphysema overlying the left parotid gland (Figure 1).
Magnified axial non-contrasted computed tomography with soft tissue window again demonstrates the gas-filled branching parotid ductal pattern (white arrow). The left parotid gland appears otherwise morphologically normal, with no features of inflammation.
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F0002
Gas was noted within the ductal system of the parotid gland (Figure 2) as well as intraductal gas following the trajectory of the left Stensen's duct (Figure 3).
Magnified axial non-contrasted computed tomography demonstrating gas in the mildly distended left Stenson's (parotid) duct (black arrowhead).
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F0003
Gas was noted within the ductal system of the parotid gland (Figure 2) as well as intraductal gas following the trajectory of the left Stensen's duct (Figure 3).