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164 Possible Causes for Orthokeratosis

  • Autosomal Recessive Congenital Ichthyosis ARCI5

    Light microscopy of skin biopsies revealed typical histopathologic features of ichthyosis, including hyperkeratosis or more extensive orthokeratosis, mild thickening of the[]

  • Angiokeratoma Circumscriptum

    Characteristic findings are: Hyperkeratosis (orthokeratosis or parakeratosis) Acanthosis Papillomatosis Thin-walled, dilated capillaries in the papillary dermis Occasionally[]

  • Necrobiotic Xanthogranuloma

    Histology of an erythematous flat papule on the arm revealed orthokeratosis, mild papillomatosis, hypergranulosis, and large vacuolated cells with grayish cytoplasm and vesicular[]

  • Diffuse Palmoplantar Keratoderma

    Histologic findings include orthokeratosis, normogranulosis, and a pronounced stratum lucidum without epidermolysis.[] Histologic findings include acanthosis, accentuation of the granular layer, and orthokeratosis; Langerhans cells are almost completely absent in the affected skin.[]

  • Erythrokeratoderma

    Skin biopsy showed epidermis with mild acanthosis, confluent parakeratosis interposed between orthokeratosis.[] A biopsy was performed that showed papillated epidermal hyperplasia, hypergranulosis, compact orthokeratosis, and focal parakeratosis.[] Skin biopsy showed epidermis with acanthosis, papillomatosis, orthokeratosis, and parakeratosis with preserved granular layer.[]

  • Tinea Corporis

    Commonly described histologic 'clues' to the diagnosis of dermatophytosis include neutrophils in the stratum corneum and/or epidermis, compact orthokeratosis and identification[]

  • Tinea Capitis

    The stratum corneum may show compact orthokeratosis or sometimes the "sandwich sign": ortho- or parakeratosis alternating in layers with the normal basket-weave stratum corneum[]

  • Epithelial Cyst

    […] cell reaction may be prominent Epithelial cell rests frequently in cyst wall May give rise to daughter cysts and dystrophic calcification Occasional findings Only focal orthokeratosis[] (30-60%) Less recurrence if completely removed May take 5-10 years to recur Orthokeratotic odontogenic cyst Rare, about 1% of cysts As above but has a granular layer and orthokeratosis[]

  • Subungual Fibroma

    Thickened collagen Hyperkeratosis and acanthosis Proliferating fibroblasts and capillaries Compact orthokeratosis Various images Polypoid dermal proliferation Prominent dense[] […] collagen in dermis is oriented predominantly in the vertical direction Stellate stromal cells may be present Covered by variably acanthotic epidermis with hyperkeratotic orthokeratosis[] Lacks adnexal structures Microscopic (histologic) images Images hosted on other servers: Dome shaped tumor Collagen fibers perpendicularly arranged Acanthosis and massive orthokeratosis[]

  • Bazex Syndrome

    Anatomopathological examination of the palmar region found hyperkeratosis with orthokeratosis and parakeratosis ( Figures 4 ).[] Transgredient plantar hyperkeratosis FIGURE 3 constrictive bands on the fifth toe (pseudo-ainhum) FIGURE 4 Anatomopathological examination of the palmar region: Hyperkeratosis with orthokeratosis[]

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