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Wyprysk z hiperkeratozą - Objawy, Diagnoza i Leczenie
Lokalizacje modzeli:
- palce stóp (okolica grzbietowa i podeszwowa oraz boczna)
- pięta
- przodostopie
- boczna krawędź stopy
ODCISK
BRODAWKA WIRUSOWA
Często występują u dzieci
Dr n.med. Danuta Nowicka ”Dermatologia. Ilustrowany podręcznik dla kosmetologów”, Wrocław 2014
ROGOWIEC
Choroba genetyczna cechująca się hyperkeratynizacją skóry i paznokci. Jest to pogrubienie ograniczone do powierzchni dłoniowych i podeszwowych, pojawiające się zwykle z powodu mutacji.
GŁÓWNE OBJAWY ROGOWCA:
- nadmiernie zrogowaciały naskórek
- żółte lub woskowe zabarwienie skóry
- zgrubiałe i przerosłe płytki paznokciowe
Odmiany rogowca
Unna-Thost pojawia się ok. 1-2 roku życia. Zmiany rogowe są symetryczne, występuje nadpotliwość dłoni i stóp.
Keratoma disseminatum pojawia się po 20 roku życia. Charakteryzuje się drobnymi, rozsianymi wykwitami. Z wiekiem może ich przybywać.
Keratoma trnsgrediens et progrediens pojawia się w pierwszych miesiącach życia. Ogniska hyperkeratotyczne występują poza dłońmi i stopami i najczęściej znajduję się na łokciach i kolanach.
Pathophysiology
The skin is composed of three layers: the epidermis, the dermis (composed of the superficial papillary and deeper reticular dermis), and the hypodermis. The skin has structural differences among the different areas of the body in terms of epidermal and dermal thickness, distribution of appendages, and pigmentation. The epidermis is composed of multiple layers of maturing keratinocytes: the basal layer (stratum basale), the squamous layer (stratum spinosum), the granular layer (stratum granulosum), and the cornified layer (stratum corneum). This stratified epithelium is in a constant process of self-renewing and exfoliation that takes 20-40 days to complete. The cells in the outer layer are the most differentiated in the keratinocyte line, composed almost entirely of keratin lamels of high molecular weight, and those are the ones that undergo desquamation, completing the maturation cycle.
When the epidermis is exposed to repetitive injury, it usually elicits an increased proliferative rate of the keratinocytes and accelerates their maturation. Keratinocytes also tend to produce more keratin, thus increasing the stratum corneum's thickness.
Genetic mutations resulting in hyperkeratosis is seen in ichthyoses and keratoderma. There are several damages in keratin-encoding genes such as KRT1 and KRT10, which cause defects in keratin structure. Defective keratin causes irregular aggregates of intermediate filaments, which leads to cellular collapse and blistering. The barrier function is then compromised, and the skin reacts with compensatory hyperproliferation, which leads to hyperkeratosis.
Treatment / Management
Basic skincare measures are important to prevent excessive dryness and to encourage exfoliation. Those remedies include soaps with skin-specific pH, soap-free cleansers, and avoidance of hot baths. Emollients and topical keratolytic agents (lactic acid, salicylic acid, urea) should be advised to be applied over affected areas at the appropriate times.
Surgical procedures have limited relevance in the treatment of hyperkeratosis. In cases of untreatable plantar keratosis with significant daily limitation, skin grafts with rotation skin flap have been demonstrated effective.[25][26]
Corticosteroids are the treatment of choice for inflammation-driven diseases such as lichen planus or psoriasis. Topical application is the best choice for localized disease. Topical applications should last one to two weeks.
Immunosuppressant or immunomodulators (cyclosporin, hydroxychloroquine, mycophenolate mofetil, sulfasalazine, alefacept, efalizumab) can be used in severe recurrent cases.
Topical calcineurin inhibitors (tacrolimus or pimecrolimus) can also be used.
Retinoids, topical or oral-based, are used in disorders of keratinization such as ichthyoses, keratosis folliculitis, and psoriasis. Topical administration is variable and must be evaluated in the appropriate clinical context, treatment usually lasts 8 to 12 weeks.
Combination treatments with lasers (e.g., pulsed-dye laser, 755-nm alexandrite laser, 810-nm diode laser, 1064-nm Nd:YAG laser) and microdermabrasion are noninvasive techniques currently under approval for different hyperkeratotic diseases.
