<P> Dermoscopy is a noninvasive technique utilizing a handheld magnifying device coupled with a transilluminating lift . It is often used in the evaluation of cutaneous lesions, but lacks the definitive diagnostic ability of biopsy - based tissue diagnosis . Histopathologic exam remains the gold standard </P> <P> Polarized contact dermoscopy of AKs occasionally reveals a "rosette sign," described as four white points arranged in a clover pattern, often localized to within a follicular opening . It is hypothesized that the "rosette sign" corresponds histologically to the changes of orthokeratosis and parakeratosis known as the "flag sign ." </P> <Ul> <Li> Non-pigmented AKs: linear or wavy vascular patterning, or a "strawberry pattern," described as unfocused vessels between hair follicles, with white - haloed follicular openings . </Li> <Li> Pigmented AKs: gray to brown dots or globules surrounding follicular openings, and annular - granular rhomboidal structures; often difficult to differentiate from lentigo maligna . </Li> </Ul> <Li> Non-pigmented AKs: linear or wavy vascular patterning, or a "strawberry pattern," described as unfocused vessels between hair follicles, with white - haloed follicular openings . </Li>

Which of the following apply to actinic keratosis