Buccal mucosal cancer arises from malignant transformation of epithelial cells in the cheek's oral mucosa. Early symptoms are nonspecific, commonly including mucosal white patches, long-standing nonhealing ulcers, and cheek lumps.
Buccal mucosal cancer prevalence worldwide
Buccal mucosal cancer accounts for a proportion of oral malignancies. Incidence is higher in parts of Southeast Asia because of betel nut chewing. Men outnumber women at a ratio of about 2:1, and onset is usually around age 50.
Buccal mucosal cancer symptoms by stage
1.Early-stage buccal mucosal cancer symptoms
The tumor is confined to the mucosal layer, presenting as buccal white or red patches or mild erosion. Local roughness, discomfort, or mild pain may occur and is easily overlooked.
2.Intermediate-stage buccal mucosal cancer symptoms
The tumor infiltrates deeper layers, forming an obvious ulcer or lump. Pain worsens, mouth opening becomes restricted, teeth loosen, and enlarged cervical lymph nodes may be palpable.
3.Advanced-stage buccal mucosal cancer symptoms
Extensive invasion of the jaw, chewing muscles, and skin causes facial deformity, severe pain, heavy bleeding, extensive cervical lymph node metastasis, and distant organ metastasis.
When to Seek Medical Attention
Early signs of buccal mucosal cancer include white or red buccal patches, long-standing nonhealing ulcers, cheek lumps, and restricted mouth opening. Consult a doctor through "Chat with a Doctor" for early detection. During an online consultation, the doctor will ask about your oral hygiene habits and symptoms and guide you toward oral examination and biopsy.
Buccal mucosal cancer stages
Stage 0 buccal mucosal cancer
Cancer cells are confined to the mucosal epithelium, representing carcinoma in situ. Well-defined white or red buccal patches occur, often without obvious symptoms.
Stage I buccal mucosal cancer
The tumor is less than two centimeters in diameter, with invasion depth no more than five millimeters and no lymph node metastasis. It presents as a small ulcer or induration with mild pain.
Stage II buccal mucosal cancer
The tumor is two to four centimeters in diameter or has an invasion depth exceeding five millimeters, without lymph node metastasis. The ulcer enlarges, pain worsens, and eating is affected.
Stage III buccal mucosal cancer
The tumor exceeds four centimeters or invades adjacent structures, with ipsilateral cervical lymph node metastasis, causing difficulty opening the mouth and loose teeth.
Stage IV buccal mucosal cancer
The tumor invades the skull base or extensive soft tissue, or spreads to the lungs, bones, and liver, causing severe facial deformity and systemic wasting.
Buccal mucosal cancer symptoms in detail
1.Buccal leukoplakia
White or red patches appear on the buccal mucosa with a rough, thickened surface and persist without fading. These precancerous lesions require regular review and are among the earliest manifestations of buccal mucosal cancer.
2.Persistent nonhealing ulcers
A buccal ulcer persists beyond two weeks, with raised, everted edges and an uneven base, bleeding easily on contact and causing marked pain. It differs from an ordinary mouth ulcer.
3.Hard, painful cheek lump
Deep tumor infiltration forms a hard lump with indistinct borders. Buccal nerve invasion causes numbness or pain in the skin of the affected cheek, and the lump progressively enlarges.
4.Markedly restricted mouth opening
Posterior invasion of the pterygomandibular ligament, masseter, or temporalis muscle causes difficulty opening the mouth. Severe cases may prevent mouth opening entirely, affecting eating and speech.
5.Loose teeth and swelling
Downward invasion of the alveolar processes of the upper and lower jaws causes ipsilateral tooth loosening, displacement, and pain, with red, swollen, eroded gums. It is often misdiagnosed as periodontal disease, but symptoms persist after extraction.
6.Strong oral odor
Tumor necrosis with infection causes foul oral odor and copious purulent bloody secretions, affecting eating and social interaction. Mouth rinsing does not readily remove the odor.
7.Blood streaks in saliva
Erosion and bleeding of the tumor surface cause blood streaks in saliva. Friction during eating worsens bleeding, sometimes with oral pain and swallowing discomfort.
8.Enlarged cervical lymph nodes
Buccal mucosal cancer readily spreads early to submandibular and upper cervical lymph nodes, producing hard, painless neck lumps that progressively enlarge, indicating metastasis.
9.Facial skin invasion
Advanced tumors penetrate the buccinator muscle and invade facial skin, causing redness, swelling, and ulceration, forming an exophytic cauliflower-like mass with foul-smelling discharge and bleeding.
Conclusion
Early symptoms of buccal mucosal cancer are easily overlooked. Oral white patches or long-standing nonhealing ulcers warrant prompt medical evaluation. Quitting smoking, limiting alcohol, and avoiding betel nut chewing are important preventive measures.
