Dermatoscopy Assist in the Diagnosis of 12 Cases of Unrecognizable Porokeratosis
Objective To analyse the initial misdiagnosis and dermoscopic features of difficult-to-identify porokeratosis(PK),and to explore the application value of dermoscopy in the diagnosis of difficult-to-identify PK.Methods The clinical data of 12 patients who were initially misdiagnosed but with typical features of porokeratosis visible in dermoscopy were collected from April 2021 to January 2024 in our hospital,and their clinical manifestations and dermoscopic features were observed.Results Among the 12 patients with PK,5(41.67％)were plaque type,1(8.33％)was verrucous plaque type,4(33.33％)were inflammatory superficial disseminated type,and 2(16.67％)were inflammatory keratosis.The initial diagnosis was misdiagnosed as psoriasis in 5 cases,lichen planus in 3 cases,eczema in 2 cases and granuloma annulare in 2 cases.In all the cases,dermoscopy revealed the"double-track sign",a structure specific to porokeratosis,with the most common vascular structures being punctate vessels,and other relatively common dermatoscopic findings were as follows:scaling,grey-brown dots at the margins,and light-brown hyperpigmentation within the margins.Conclusion The clinical course,morphology and distribution of PK subtypes vary and need to be differentiated from a variety of skin diseases,including lichen planus,psoriasis,seborrheic keratosis,lupus erythematosus,etc.Dermoscopy can be used to assist in the diagnosis of difficult-to-identify porokeratosis to further clarify the diagnosis and reduce the misdiagnosis rate.
万方数据
维普
