PMC3169831_01
Extraoral photograph of the patient in Case 1 showing the everted lower lip.
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Extraoral examination revealed that the left side of his lower lip was enlarged and grossly everted, and the right side of his upper lip was slightly everted and rather firm to palpation with indiscernible borders (Figure 1).
(a) and (b) show the upper and lower lip of the patient, respectively. There was painless swelling, and induration on both lips with abscess. The surface mucosa showed a color change and produced cloudy fluid at the sites of ductal openings.
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The left lower and the right upper labial mucosa had a round ulceration, approximately 8 mm in diameter (Figures 2(a) and 2(b)), and produced cloudy exudate at ductal openings.
Histologic findings of Case 1. Focal infiltration of lymphocytes and plasma cells is observed at interlobular region in the slightly hypertrophic labial gland. Original magnification x40 (a), x200 (b).
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The labial glands were slightly hyperplastic and associated with focal infiltration of lymphocytes and plasma cells at interlobular region (Figure 3).
PMC3169831_02
MR imaging of Case 2. (a) T1-weighted image, (b) T2-weighted image, and (c) short T1 inversion recovery image.
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The signal intensity of the mass was relatively low compared with the surrounding soft tissue on T1-weighted magnetic resonance (MR), but remarkably high on T2-weighted and short T1 inversion recovery MR, which suggested fluid collection (Figures 4(a), 4(b), and 4(c)).
Histologic findings of Case 2. Incisional biopsy (a) and wedge excision of the upper lip (b). Atrophic labial glands and dilated ducts were scattered among fibrosis associating with lymphocyte infiltration. Original magnification x40 (a), (b).
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Fibrosis and lymphocyte infiltration also occurred at interlobular region in the labial gland (Figure 5(a)). A few atrophic labial glands and dilated duct were scattered among the fibrosis (Figure 5(b)).