Abstract
A female baby,18 months old, developed a Mucocele in her right lower lip and has been under observation after total extirpation of the Mucocele.
The extirpated Mucocele was examined neurohistologically
The results were as follows:
1. The cyst walls showed indistinct borders because of duct rupture and consisted of granulation tissue with slight proliferation of fibrous connective tissue.
2. The cyst contained mucous materials, many plasma cells, and macrophages.
3. The causative salivary duct showed indication of partially becoming a small cyst.
4. Almost no nerve fibers were observed around the causative salivary gland. Away from the gland, the so called sensory nerve bundles showed a tortuous course, swelling, and interruption. Although most nerve fibers had disappeared, some nerve fibers which still remained slightly argyrophil were observed sporadically.
On the basis of the foregoing results and review of the literature, the cause of the present case was postulated to be chronic stimulations accompanying eruption of the anterior deciduous teeth.
