IntroductionPolymorphous low-grade adenocarcinoma (PLGA) has been known as a comparatively less aggressive malignant tumor that predominantly occurs in the minor salivary glands. It has presented as a painless, slow growing tumor in the oral cavity. It has been reported to occur rarely in the palate and the prognosis of this lesion is far better than adenocarcinoma as the regional metastasis would be very minimal. A clear difference between the biologic behaviors of adenocarcinoma and PLGA has been reported in literature.Case PresentationA 63-year-old female reported at our institute with a swelling in relation to her upper left back region of her jaw for three months, gradual in onset and associated with pain. After clinical and radiological examination, the differential diagnosis were consolidated abscess or minor salivary gland tumor. An incisional biopsy was done and the lesion was diagnosed as PLGA. The lesion was treated by wide excision and reconstruction with immediate obturator. The post-operative follow up showed no evidence of recurrence and the healing was satisfactory.ConclusionsThe site of predilection of PLGA is more in favor of palate (49 - 77.8%) followed by either upper lip or buccal mucosa (7.4 - 13.4%). There are sporadic reports of metastasis sometimes even transformation to a high grade adenocarcinoma, sometimes ending in mortality. Cervical lymph node metastasis is rare with reported incidence of 5 - 15% and is more commonly seen in recurrent tumor than the initial diseases. Extra palatal PLGAs present with significant papillary growth or arising from ventral surface of tongue frequently metastasize to cervical lymph nodes. Distant metastasis is very rare with an incidence of 7.5% and the site involved is the lung which is attributed to the inadequate control of the disease.

Various surgical procedures are available for treating oral submucous fibrosis, but all of them have their inherent drawbacks. The superiorly based platysma myocutaneous flap is a common reconstruction option for intraoral defects followed after excision of fibrous bands in oral submucous fibrosis. The superiorly based flap has an excellent blood supply, but less efficient venous drainage when compared with posteriorly based flap. We present our results of using a superiorly based flap in the treatment of oral submucous fibrosis. Of 10 patients eight had no postoperative complications, one patient developed partial skin loss and other developed venous congestion which was managed conservatively.

Schwannoma is usually an uncommon, benign, encapsulated, very slow-growing, usually solitary tumor that originates from Schwann cells of the nerve sheath derived from the neuroectoderm. Only 1% of schwannomas was intraoral of which the most common site is always the tongue after which the palate, floor of the mouth, buccal mucosa, lips, and jaws can be affected. Schwannoma is an uncommon benign tumor that originates from the Schwan cell of the peripheral nerves. It is difficult to diagnose clinically. In our case, the patient reported a solitary swelling present on the left cheek. The swelling was warmth, tender, and consistency is soft. Inflamed buccal mucosa was also noted and the patient had restricted mouth opening. Then, surgical excision was done under general anesthesia. How to cite this article: Kumaravelu R, Sathyanarayanan R, Jude NJ. An Uncommon and Rare Soft Tissue Tumor of the Cheek (Schwannoma): A Case Report. J Sci Dent 2020;10(2):38–40.

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