This is seen commonly in
Surface of the papules in lichen planus often reveals a network of grey lines (Wickham's striae). Typically seen in oral mucosa Oral lichen planus (LIE-kun PLAY-nus) is an ongoing (chronic) inflammatory condition that affects mucous membranes inside your mouth. Oral lichen planus may appear as white, lacy patches; red, swollen tissues; or open sores. These lesions may cause burning, pain or other discomfo. Ref: Harrison 19e pg: 349
SLE
Lichen planus
Psoriasis
Leprosy
Papulosquamous disorders