Median Canaliform and Habit‐Tic Deformity of the Nail: Is there an Association with Macrolunulae?

Coexisting median canaliform nail dystrophy and habit‐tic deformity in a patient with atopic dermatitis

“…However, thickened and clumped elastotic fibres as well as fragmentation of elastic fibres in the reticular dermis to go along with scattered elastotic globes in the papillary dermis may also be appreciated in some cases. 1 Herein, we report a case with distinct vacuolar interface dermatitis previously undocumented. A 43-year-old woman presented with slightly pruritic papules on her neck for the past 2 years.…”

“…Fibroelastolytic papulosis is a rare, acquired fibroelastolytic disorder characterised by white-yellow papules and plaques most commonly in elderly women, which encompasses the spectrum of white fibrous papulosis, pseudoxanthoma elasticum-like papillary dermal elastolysis and the recently described papillary dermal elastosis. 1 Histopathologic features demonstrate elastolysis and fibrosis in the upper dermis. However, thickened and clumped elastotic fibres as well as fragmentation of elastic fibres in the reticular dermis to go along with scattered elastotic globes in the papillary dermis may also be appreciated in some cases.…”

“…Median canaliform nail dystrophy and habit-tic deformity are nail abnormalities that may be on the same disease spectrum. 1,2 However, coexistence of these two conditions is rarely observed. We describe a rare case of median canaliform nail dystrophy and habit-tic deformity coexisting in a patient with atopic dermatitis.…”

“…4 An association between median canaliform nail dystrophy and macrolunulae supports the role of trauma in the pathogenesis of median canaliform nail dystrophy; more nail matrix lies outside of the proximal nail fold and thus is more susceptible to damage. 1,2 Median canaliform nail dystrophy has also been associated with the use of systemic retinoids and familial occurrence. 4,5 Coexistence of both conditions suggests the two have a similar pathogenesis and may be on the same disease spectrum.…”