📂 Diseases
xeroderma pigmentosum variant type — Definition
Xeroderma pigmentosum varyant tipi / xeroderma pigmentosum variant type
Xeroderma pigmentosum variant type is a rare genetic disease characterized by hypersensitivity to sunlight and pronounced increase in the risk of skin cancer. This variant is caused by mutation of polymerase ether enzyme on the path of an alternative DNA damage tolerance called transletion synthesis, not from a defect in DNA repair mechanisms. The disease is distinguished by different neurological findings from classic xeroderma pigment, often not being seen and the appearance of skin lesions in later ages. Clinically manifests itself with intense freckling, dryness and early ageing symptoms in areas exposed to sun during early childhood.
Disease Definition
🔬 Disease Definition
Xeroderma pigmentosum variant type (XP-V), DNA hasarının onarımında rol oynayan polimeraz eta (POLH) genindeki mutasyonlar sonucu oluşan, güneş ışığına aşırı duyarlılık ve yüksek cilt kanseri riski ile karakterize otozomal resesif bir hastalıktır.
🧬 Causes & Risk Factors
POLH genindeki mutasyonlar, translesiyon sentezi yapan DNA polimeraz eta'nın işlevini bozarak UV kaynaklı DNA hasarının tamirini engeller.
🩺 Symptoms & Signs
Güneşe maruz kalan bölgelerde erken yaşta çillenme, pigmentasyon değişiklikleri, kuru cilt, aktinik keratoz, bazal hücreli karsinom, skuamöz hücreli karsinom ve melanom gelişimi.
📋 Diagnostic Methods
Klinik bulgular, aile öyküsü, güneşe duyarlılık testleri ve POLH gen mutasyon analizi ile konur.
💊 Treatment Options
Güneşten korunma (fiziksel bariyerler, yüksek faktörlü güneş kremleri), düzenli dermatolojik takip, prekanseröz ve kanseröz lezyonların cerrahi veya topikal tedavisi.
⚠️ Complications
Cilt kanserleri (bazal hücreli, skuamöz hücreli, melanom), oküler yüzey hasarı, nadiren nörolojik bulgular.
Frequently Asked Questions
❓ What is Xeroderma pigmentosum varyant tipi?
Xeroderma pigmentosum varyant tipi; xeroderma pigmentosum variant type is a rare genetic disease characterized by hypersensitivity to sunlight and pronounced increase in the risk of skin cancer. This variant is caused by mutation of polymerase ether enzyme on the path of an alternative DNA damage tolerance called transletion synthesis, not from a defect in DNA repair mechanisms. The disease is distinguished by different neurological findings from classic xeroderma pigment, often not being seen and the appearance of skin lesions in later ages. Clinically manifests itself with intense freckling, dryness and early ageing symptoms in areas exposed to sun during early childhood.
❓ What is xeroderma pigmentosum variant type in Turkish?
The Turkish equivalent of "xeroderma pigmentosum variant type" is Xeroderma pigmentosum varyant tipi.
❓ Which medical field is Xeroderma pigmentosum varyant tipi related to?
This term belongs to the Diseases category.