Types of Melanoma Quiz
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Questions and Answers

Which condition is associated with partial or complete loss of skin pigmentation?

  • Pernicious anemia
  • Diabetes
  • Vitiligo (correct)
  • Melanoma
  • What is a characteristic clinical feature of melanoma?

  • Psoriasis-like scales
  • Eczema-like rash
  • Hyperpigmentation
  • Hypopigmentation (correct)
  • Which of the following is a strong risk factor for developing melanoma?

  • Excessive UV exposure (correct)
  • Vegetarian diet
  • Genetic engineering
  • African descent
  • What is a common genetic mutation associated with melanoma pathogenesis that leads to uncontrolled cell growth?

    <p>Loss-of-function mutation in CDKN2A</p> Signup and view all the answers

    Which of the following is NOT a marker used to identify melanoma cells?

    <p>Cytokeratins</p> Signup and view all the answers

    In which phase of growth does metastatic melanoma invade deeper dermal layers?

    <p>Vertical Growth Phase</p> Signup and view all the answers

    Which condition is strongly associated with the presence of red hair and freckles from sun exposure?

    <p><strong>Xeroderma pigmentosum</strong></p> Signup and view all the answers

    What is the main responsibility of small GTPases in cell signaling pathways?

    <p>Control cell growth, migration, adhesion, and differentiation</p> Signup and view all the answers

    How does a RAS mutation in melanoma typically occur?

    <p>Through the switch signaling from CRAF to BRAF</p> Signup and view all the answers

    Which syndrome is associated with germline mutations in BRAF?

    <p>Cardiofaciocutaneous syndrome</p> Signup and view all the answers

    What is the main effect of TERT mutations on telomerase activity?

    <p>Increase telomerase activity</p> Signup and view all the answers

    Which type of cancer is NOT associated with mutations in TERT promoters?

    <p>Pancreatic cancer</p> Signup and view all the answers

    What clinical feature is associated with Hutchinson's sign?

    <p>Presence of longitudinal melanonychia on cuticle</p> Signup and view all the answers

    Which of the following conditions is NOT associated with Hutchinson's sign?

    <p>Vitiligo</p> Signup and view all the answers

    How do TERT mutations contribute to carcinogenesis?

    <p>Through impaired telomere maintenance and DNA damage</p> Signup and view all the answers

    What aspect of cell signaling pathways does BRAF primarily affect?

    <p>Differentiation and secretion</p> Signup and view all the answers

    Which subtype of melanoma is characterized by malignant cells staying within the basal and upper epidermis?

    <p>Superficial Spreading Melanoma</p> Signup and view all the answers

    What is a distinguishing feature of Lentigo Maligna Melanoma?

    <p>Presence of spindle-shaped melanocytes in the dermis</p> Signup and view all the answers

    Which subtype of melanoma is known for its aggressive nature with early vertical growth phase?

    <p>Nodular Melanoma</p> Signup and view all the answers

    What is a characteristic feature of Invasive Melanoma?

    <p>Presence of nuclear pseudoinclusions</p> Signup and view all the answers

    Which sign is associated with Invasive Melanoma?

    <p>Hutchinson's sign</p> Signup and view all the answers

    What differentiates Pagetoid spread in Melanoma from Pagetoid spread in Adenocarcinoma?

    <p>S100/HMB45 positive, cytokeratin negative in Melanoma</p> Signup and view all the answers

    Which subtype of melanoma affects the skin of soles, palms, digits, and nail apparatus?

    <p>Acral Lentiginous Melanoma</p> Signup and view all the answers

    What is a distinguishing feature of Amelanotic Melanoma?

    <p>Reddish slightly elevated plaque</p> Signup and view all the answers

    What is a characteristic feature of multinucleated melanoma cells in the basal layer?

    <p>Highly pigmented with starburst forms</p> Signup and view all the answers

    Which type of melanoma shows nests or single cells at the basal layer along with marked elastosis?

    <p>Superficial Spreading Lentigo Maligna</p> Signup and view all the answers

    What is a distinguishing feature of Invasive Melanomas in terms of their spread?

    <p>Vertical growth</p> Signup and view all the answers

    Which marker is typically POSITIVE in both benign nevus and melanoma?

    <p>S100</p> Signup and view all the answers

    What is a key characteristic of Clark's Level III of invasion in melanoma?

    <p>Papillary dermis expansion</p> Signup and view all the answers

    Which condition shows a negative reaction to HMB45 and S100 markers?

    <p>Pyogenic Granuloma</p> Signup and view all the answers

    In Lentigo Maligna, what is a common feature seen in the underlying dermis?

    <p>Solar elastosis</p> Signup and view all the answers

    Which system measures tumor thickness using an ocular micrometer at right angles to the tumor?

    <p>Breslow's System</p> Signup and view all the answers

    What type of differential diagnosis is important when considering Paget's disease?

    <p>HMB45 melanA S100 negative, CK7 positive</p> Signup and view all the answers

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