PMC7813659_01
PMC7813659_02
lateral view of the neck showing the left postauricular mass
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F1
Ten days after this operation, a pruritic, painless lesion of a size 2 cm x 2 cm was observed at the incision area (Figure 1).
otoscopic findings of the posterior wall of the left auditory canal showing a mass; a normal tympanic membrane was seen
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F2
Otoscope examination revealed an external auditory meatus protrusion, with a normal tympanic membrane (Figure 2).
MRI displaying a hypointense lesion
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F3
Magnetic resonance imaging (MRI) revealed a heterogeneous lesion (Figure 3).
facial nerve trunk exposed and protected
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F4
The superficial lobe of the parotid gland was gradually removed with caution to the facial nerve trunk (Figure 4).
removed parotid gland, lymph nodes, and adipose connective tissue of size 2 cm x 2 cm x 1.4 cm
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F5
The diameter of the larger lymph node being 2 cm (Figure 5).
sutured layer with a drainage tube
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F6
A drainage tube was inserted (Figure 6).
A,B) biopsy of the left parotid gland revealing a malignant tumour, a persistent mucoepidermoid carcinoma
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F7
Hematoxylin and eosin (H&E) staining indicated a D-PAS positive (Figure 7).