Pityrisasis rubra pilaris
User=linear vesselsLinear mildly curved vessels considered irregular when different sizes shapes and curves with a haphazard or random distribution are presented and considered regular when short and fine (thin) linear vessels prevail various diagnoses either solely or mixed with dotted vesselstiny pinpoint vessels flat melanocytic lesions inflammatory diseases Bowen disease on a yellowish background are the most frequent dermoscopic features reported for pityriasis rubra pilarisThis glossary term has not yet been described.. This observation suggests that pityriasis rubra pilaris shows no typical characteristics of psoriasisThis glossary term has not yet been described., which is the most common differential diagnosisis the identification of the nature and cause of a certain phenomenon. Diagnosis is used in many different disciplines with variations in the use of logic, analytics, and experience to determine "cause and effect". In systems engineering and computer science, it is typically used to determine the causes of symptoms, mitigations, and solutions. 
- Abdel-Azim et al.: Differentiation of pityriasis rubra pilaris from plaque psoriasis by dermoscopy. Arch. Dermatol. Res. 2017;309:311-314. PMID: 28280914. DOI.
- López-Gómez et al.: Dermoscopy of circumscribed juvenile pityriasis rubra pilaris. J. Am. Acad. Dermatol. 2015;72:S58-9. PMID: 25500045. DOI.
- Lallas et al.: Photoletter to the editor: Dermoscopy for discriminating between pityriasis rubra pilaris and psoriasis. J Dermatol Case Rep 2013;7:20-2. PMID: 23580911. DOI.