Die Krankheiten der Nägel

Nail psoriasis: a questionnaire-based survey

“…It might be expected that our prevalence number is an overestimation, as patients who are members of a patients' association might have more severe psoriasis, but the prevalence rate of 66·0% seems in line with the discussed cohort studies. Only two studies found prevalence rates below 40·0% . The prevalences found in the remaining studies varied between 40% and 80%, and are in line with the result of the present study.…”

“…The true percentage of nail involvement in patients with psoriasis will therefore lie between 17·8% and 66·0%. In the literature, percentages of patients with psoriasis with nail involvement vary between 10·0% and 81·8% . Comparison of the different prevalence numbers of nail psoriasis found in different studies is difficult as a consequence of the different methodological designs.…”

Yellow nail syndrome: a review

“…The first case of yellow nail syndrome (YNS; OMIM 153300, ORPHA662) was probably reported by Heller in 1927 [ 1 ], but Samman & White described the first series of patients who had yellow nails associated with lymphedema in 1964 [ 2 ]. That report included 13 patients (six men, seven women; age range at onset 25–65 years), all of whom had very slow measured nail growth associated with abnormal nail-plate discoloration, ranging from pale yellow to dark greenish, and frequent onycholysis.…”

The Nail in Lichen Planus

“…Characteristically, one sees: (1) irregular, longitudinal grooving and ridging of the nail plate; (2) "pterygium" formation; (3) shedding of the nail plate with atrophy of the nail bed; (4) subungual keratosis; and (5) subungual hypergimentation.…”

“…The nail area is covered by a thick horny layer (hematoxylin-eosin, x 16). trix; (3) proximally and laterally overlap¬ ping skin folds; (4) the hyponychium, which is continuous from the nail bed but behaves as volar skin.…”