Abstract
A salivary duct cyst is a cavity delimited by an epithelium arising from salivary gland tissue, with its true development different from that of the adjacent normal salivary ducts, with uncertain cause. A 30-year-old black man noticed a labial growth with a 3-month evolution, accompanied by painful symptomatology and feeding difficulty. A physical examination showed a 1-cm, well-delimited nodule on the left lower lip, similarly-colored as the adjacent oral mucosa, but with a whitish center and soft consistency, clinically suggesting a mucocele. With an excisional biopsy, the histological sections revealed a lesion characterized by the presence of a salivary gland duct, lined by dilated cystic epithelium. In the lumen, the presence of a mucoid substance, presenting a discrete non-specific chronic inflammatory, predominantly lymphocytic, infiltrate was observed. A diagnosis of salivary duct cyst was established. The patient returned for an 8-month postoperative follow-up, with no clinical signs of recurrence.
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