Langerhans cell histiocytosis (LCH) is related diseases characterized by proliferation of Langerhans cell with involvement of bone, skin, lung and other organs. LCH usually occurs in childhood and are presented as multiple small papules or eczematoid lesion mostly. We report a 50-year-old man with 3 brown lichenoid patches on left dorsal foot. He was diagnosed pulmonary LCH 5 years ago. Typical...

This paper reports an interesting development in a 64 year old female originally referred for evaluation of oral lichenoid lesions. The patient had a previous diagnosis of discoid lupus erythematosus of the skin. The presenting oral clinical appearance varied between lichenoid areas and ectopic erythema migrans. At initial presentation the patient had an exophytic lesion on the vermilion of the...

FDG: fluorodeoxyglucose LPP: lichen planopilaris PET-CT: positron emission tomographye computed tomography PD-1: programmed cell death receptor 1 P embrolizumab, a programmed cell death receptor 1 (PD-1) inhibitor, has been used effectively for treatment of metastatic melanoma. Reported cutaneous adverse events ascribed to PD-1 inhibitors include lichenoid reactions such as lichen planus of the...

Actas Dermosifiliogr. 2009;100:615-34 619 7. Menzies SW, Westerhoff K, Rabinovitz H, Kopf AW, McCar thy WH, Katz B. Sur face microscopy of pigmented basal cel l carcinoma. Arch Dermatol. 2000;136: 1012-6. 8. Zaballos P, Blázquez S, Puig S, Salsench E, Rodero J, Vives JM, et al. Dermoscopic pattern of intermediate stage in seborrhoeic keratosis regressing to lichenoid keratosis: report of 24 cas...