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Cutaneous squamous-cell carcinoma is the second-most common cancer of the skin (after basal-cell carcinoma, but more common than melanoma). It usually occurs in areas exposed to the sun. Sunlight exposure and immunosuppression are risk factors for SCC of the skin, with chronic sun exposure being the strongest environmental risk factor. [26]
The salivary glands are classified as major or minor. The major salivary glands consist of the parotid, submandibular, and sublingual glands. The minor salivary glands consist of 800 to 1000 small mucus-secreting glands located throughout the lining of the oral cavity. [2] Patients with these types of tumours may be asymptomatic. [1]
Conditions of or affecting the human integumentary system associated with increased risk of nonmelanoma skin cancer Condition Squamous-cell carcinoma Basal-cell carcinoma; Xeroderma pigmentosum + + Oculocutaneous albinism + + Epidermodysplasia verruciformis + Recessive dystrophic epidermolysis bullosa + Ferguson–Smith syndrome + Muir–Torre ...
These are called Marjolin's ulcers based on their appearance, and can develop into squamous-cell skin cancer. Ionizing radiation such as X-rays, environmental carcinogens, and artificial UV radiation (e.g. tanning beds). [30] It is believed that tanning beds are the cause of hundreds of thousands of basal and squamous-cell skin cancer. [33]
Squamous-cell carcinoma (SCC), also known as epidermoid carcinoma, comprises a number of different types of cancer that begin in squamous cells. [1] These cells form on the surface of the skin, on the lining of hollow organs in the body, and on the lining of the respiratory and digestive tracts .
Mucoepidermoid carcinoma (MEC) [1] is the most common type of minor salivary gland malignancy in adults. Mucoepidermoid carcinoma can also be found in other organs, such as bronchi, lacrimal sac, [2] and thyroid gland. Mucicarmine staining is one stain used by pathologist for detection. [3]
The sublingual papilla or sublingual fold is a small fold of soft tissue located on each side of the lingual frenulum. [1] The sublingual papilla marks the site of the sublingual gland [ 2 ] with its major sublingual duct [ 3 ] and its minor sublingual ducts [ 4 ] opening upon the papilla.
The sublingual gland (glandula sublingualis) is a seromucous polystomatic exocrine gland. Located underneath the oral diaphragm ( diaphragma oris ), the sublingual gland is the smallest and most diffuse of the three major salivary glands of the oral cavity, with the other two being the submandibular and parotid .