Diagnostic Approach for Tongue Lesion

The patient presents with a white plaque on the lateral border of the tongue, accompanied by soreness for two months. Key risk factors include being a smoker and having poor oral hygiene.

A persistent white plaque on the lateral border of the tongue, especially in a smoker, is concerning for leukoplakia, a potentially malignant disorder. The duration of symptoms (2 months) and soreness warrant further investigation.

Evaluating Management Options

• Oral vitamin C supplementation: While important for overall oral health, it is not a primary diagnostic or treatment step for a suspicious lesion like this.
• Oral antifungal treatment: This is indicated for oral candidiasis (thrush). While secondary candidiasis can occur on leukoplakia, the primary concern here is the nature of the white plaque itself, not solely a fungal infection.
• Edge biopsy of the lesion: This is the most crucial next step. A biopsy allows for histological examination to determine if the lesion is benign, pre-malignant (e.g., dysplasia), or malignant (e.g., squamous cell carcinoma). This definitive diagnosis guides further management.
• Local topical cauterization: This is a treatment method and should only be considered after a diagnosis is established. It is inappropriate as an initial step for an undiagnosed lesion with malignant potential.

Conclusion on Next Step

Given the clinical presentation (persistent white plaque, lateral border, smoker, duration), obtaining a tissue diagnosis is paramount. Therefore, an edge biopsy of the lesion is the appropriate next step to confirm the diagnosis and plan subsequent treatment.