A 28-year-old female presented with multiple,asymptomatic maculopapule for 20 years,which started from the left upper back and gradually expanded to the left upper limb.She had an operation for thyroid cancer one year ago and some new asymptomatic lesions appeared on her posterior neck,palms and wrists after surgery.Dermoscopy of the lesions on the posterior neck,back,upper limb,palm and wrist disclosed a central homogenous brown to light red area with dots or linear vessels and whitish to brown-colored double-marginated track-like border.Skin biopsy of the neck showed hyperkeratosis with a coronoid lamella on the horny layer and several lymphocytes on the corium layer.Based on clinical manifestation,dermoscopy and histopathological findings,the diagnosis of generalized linear porokeratosis was made.
Linear porokeratosisBlaschko linesDermoscpopyThyroid cancer
万方数据
维普
