Which condition is associated with a net-like or spider web-like appearance of lacy white lines on the mucosal surface of the cheek?

The condition characterized by a net-like or spider web-like appearance of lacy white lines on the mucosal surface of the cheek is indeed associated with lichen planus. This condition presents with a distinct clinical feature known as Wickham's striae, which are the white lines that create a lacy pattern on the oral mucosa. Lichen planus is a chronic inflammatory condition that affects the skin and mucous membranes and can cause a variety of symptoms, including discomfort and soreness in addition to the characteristic appearance.

In comparison, oral squamous cell carcinoma typically presents as lesions that are irregularly shaped, and they do not exhibit the specific lacy white lines that define lichen planus. Leukoplakia is defined by white patches on the oral mucosa that cannot be scraped off, and it does not have the same net-like pattern. Candidiasis, or oral thrush, results in creamy white lesions but lacks the distinct lacy white lines seen in lichen planus. Each of these conditions has its own unique clinical presentations, making the identification of lichen planus distinct among them.