Question: Can lichen communities be used to assess shortand long-term factors affecting seral quaking aspen (Populus tremuloides) communities at the landscape scale? Location: Bear River Range, within the Rocky Mountains, in northern Utah and southern Idaho, USA. Method: Forty-seven randomly selected mid-elevation aspen stands were sampled for lichens and stand conditions. Plots were characteri...

Lichen planus is a T-cell mediated autoimmune disorder affecting the skin and mucous membranes. Ulcerating lichen planus is uncommon mostly on oral and genital mucosa but not skin. Lichen planopilaris, however, is a subtype of lichen planus affection hair follicles and leading to permanent scarring alopecia. We report a case of lichen planopilaris of the scalp with multiple alopecic patches ulc...

background: lichen planus is a skin disease that rarely involves mucus membrane. case: in this study, we introduced a rare case of lichen planus of the right vocal cord in a 51- year -old male presented with hoarseness. the lesion started two years ago and the hoarseness became progressive. there were not any lesions found in his buccal mucosa and skin. the biopsy of the lesion showed lichen pl...

The cytotoxicity effect of aqueous extracts of the lichens species Myelochroa lindmanii and Canoparmelia texana (Lecanorales, Parmeliaceae) were evaluated using meristematic cells of lettuce (Lactuca sativa) and maize (Zea mays). The seasonal effect was also evaluated. Extracts of M. lindmanii and C. texana inhibited root growth and/or percentage germination, possibly due to alterations in the ...

Background: Lichen planus is a skin disease that rarely involves mucus membrane. Case: In this study, we introduced a rare case of lichen planus of the right vocal cord in a 51- year -old male presented with hoarseness. The lesion started two years ago and the hoarseness became progressive. There were not any lesions found in his buccal mucosa and skin. The biopsy of the lesion showed lichen...

Oral lichen planus which is one of the most common oral mucosal diseases in adults, it has been rarely described in children. There are very reports in the literature regarding oral lichen planus in children, here we report a case of intraoral lesions of lichen planus. Lichen planus should be considered in the differential diagnosis of hyperkeratotic or erosive lesions of the oral mucosa in chi...

Seven new mono- and bis-furanones, pezizolides A-G (1-7), have been isolated from the crude extract of the endolichenic fungus Peziza sp. inhabiting the lichen Xanthoparmelia sp. The structures of the new compounds were elucidated mainly by NMR and MS methods. The absolute configuration of 1-4 was assigned by the application of CD exciton chirality method, and 1 was further supported by electro...

INTRODUCTION Up to 30% of squamous cell carcinomas of the penis arise from a lichen sclerosus, but very few reports in which lichen planus was the preexisting lesion have been published. We report a male with verrucous carcinoma of penis that developed in an area of lichen planus. CLINICAL CASE A 53-year-old male presented with an exophytic tumor on the glans penis that had been present for a...