Dermoscopic Features of Lichen Planus Pigmentosus-Inversus

Lichen planus pigmentosus inversus with epidermal melanin granules

“…Histopathologically, the papule showed abundant lymphocytic infiltrates with the presence of histiocytes and melanophages beneath a flattened dermoepidermal junction and narrow epidermis. To date, case reports of LPPI have described macules, patches or plaques as being brown, dark‐brown, greyish‐brown or brownish in colour, and they have tended to describe pigmentary incontinence or melanophages in the upper dermis similar to the findings of Pock et al . We found that melanin granules were present not only in the dermis but throughout the epidermis in our patient, who had a similar clinical presentation.…”

Pigmented Intertriginous Lesions and Bullous Plaques: A Quiz

“…This unusual clinical presentation may have resulted from the long disease duration. In cases described previously the mucous membranes as well as the scalp and nails were spared (3)(4)(5)(6)(7)(8)(9)(10)(11)(12). However, in the current case the hyperpigmented lesions were accompanied by lesions in the oral mucosa.…”

“…The larger lesions tend to be annular or linear, and the long axis follows the lines of cleavage (3)(4)(5)(6)(7)(8)(9)(10)(11)(12). Our patient presented with a rare reticular pattern of extensive hyperpigmented lesions and typical histology for LPP-inversus.…”

Lichen planus pigmentosus and its variants: review and update

“…7). [40][41][42][43] In a study of LPP associated with FFA, a dotted pattern was also found. A pseudonetwork pattern and telangiectasias were also found, particularly with facial involvement of LPP.…”

“…White dots are secondary to lack of pigmentation in the follicular openings, and the absence of pigment in skin furrows may be due to lack of exposure to friction (Fig. ) …”