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169 Possible Causes for Elongation of Rete Ridges

  • Penile Intraepithelial Neoplasia

    Elongation of rete ridges with bridging/anastomoses between rete ridges. Nuclear atypia - esp. of the basal layer. Nuclei in stratum corneum ( parakeratosis ).[] Image C Image D Histology: Differentiated PEIN (HPV-unrelated): elongated rete ridges with abnormal maturation (pinker cytoplasm); whorling and keratin earl formation.[] Histopathological examination demonstrates hyperkeratosis, parakeratosis, acanthosis, elongated rete ridges, and mild lower epidermal dysplasia with a nonspecific dermal inflammatory[]

  • Dyschromatosis Universalis Hereditaria 1

    Skin biopsy from the hypopigmented macule over the lower abdomen also showed elongation of the rete ridges but with pigmentation limited only to the tips of the rete pegs[] .  Epidermal atrophy  Elongated thin rete ridges  Increased basal layer pigmentation at tips of rete ridges  Special staining shows increased number of dopa-positive melanocytes[] The acanthosis and elongation of rete ridges, though typical were much lesser in the hypopigmented macule compared to the hyperpigmented macule.[]

  • Angiokeratoma Circumscriptum

    […] of rete ridges.[] It interestingly showed features of hyperkeratosis, acanthosis and elongation of rete ridges, dilated and congested blood vessels in papillary dermis.[] (b and c) Epidermis showing hyperkeratosis and acanthosis with elongation of rete ridges.[]

  • Dowling-Degos Disease Type 1

    Figure 2: (a) Skin biopsy from the hyperpigmented macules showing hyperkeratosis, elongated and bifurcated rete ridges (‘antler like’ rete ridges) with increased melanin pigment[] […] of rete ridges in a reticulated or fenestrated pattern and a few horn cysts [ Figure 2h ].[] Skin biopsy from the hypopigmented macule over the lower abdomen also showed elongation of the rete ridges but with pigmentation limited only to the tips of the rete pegs[]

  • Familial Supernumerary Nipples

    Figure 4: Hyperkeratosis, acanthosis, elongated rete ridges, increased pigmentation of basal keratinocytes from a hyperpigmented, and hyperkeratotic plaque over groin area[] Epidermis is acanthotic with variable hyperkeratosis and elongation of rete ridges. [13] Histopathological association that is common with Becker's nevus is smooth muscle[] Histopathological examination revealed hyperkeratosis, acanthosis, elongated rete ridges, and increased pigmentation of basal keratinocytes: these observations were suggestive[]

  • Sacral Hemangiomas - Multiple Congenital Abnormalities Syndrome

    The relatively few biopsies performed have shown extension of the surrounding normal skin with some acanthosis, elongation of rete ridges and proliferation of capillaries[] In only one case in this study there was some acanthosis along with elongation of rete ridges. [2] , [3] , [4] Upper dermal edema, telangiectasias and mild infiltration of[]

  • Psoriasis

    […] of rete ridges with shortening of epidermal keratinocyte transit time due to decreased cyclic guanosine monophosphate.[] […] reddish, silvery-scaled maculopapules; the lesions occur predominantly on the elbows, knees, scalp, and trunk, and microscopically show characteristic parakeratosis and elongation[]

  • Phenobarbital

    The histological examination of the lesion revealed a hyperplastic epithelium, epithelial acanthosis, and elongated rete ridges as well as obviously enhanced dense collagenous[]

  • Balanitis

    […] of rete ridges.[] […] which coalesce to form larger "geographic" areas with a white margin. 82 The histology shows spongiform pustules in the upper epidermis with parakeratosis, acanthosis and elongation[]

  • Dyschromatosis symmetrica hereditaria

    Histological features include filiform elongation of rete ridges involving the follicular infundibulum and melanocyte proliferation without melanin incontinence.[] The histology is diagnostic, showing elongation, tufting and deep hyperpigmentation of the rete ridges. [8] Although presence of axillary freckle-like macules points to the[] […] and increased melanin in of rete ridges, and increased numbers of DOPA-positive melanocytes. [2] , [19] Treatment and prognosis There is very little that can change the course[]

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