Podcast
Questions and Answers
What skin condition is characterized by depigmented macules that may coalesce into extensive areas lacking melanin?
What skin condition is characterized by depigmented macules that may coalesce into extensive areas lacking melanin?
- Acanthosis Nigricans
- Vitiligo (correct)
- Tinea Versicolor
- Hemangioma
In tinea versicolor, where are the hypopigmented, slightly scaly macules typically found?
In tinea versicolor, where are the hypopigmented, slightly scaly macules typically found?
- Extensor surfaces
- Eyelids
- Face and hands
- Trunk, neck, and upper arms (correct)
Which skin condition is characterized by a violaceous eruption over the eyelids and is associated with dermatomyositis?
Which skin condition is characterized by a violaceous eruption over the eyelids and is associated with dermatomyositis?
- Dermatofibroma
- Herpes Simplex
- Acanthosis Nigricans (correct)
- Psoriasis
What type of skin lesion is a vesicle filled with serous fluid?
What type of skin lesion is a vesicle filled with serous fluid?
What term describes a superficial area of localized skin edema that is relatively transient?
What term describes a superficial area of localized skin edema that is relatively transient?
Which skin condition results in macules that appear reddish or tan in lighter skin instead of pale?
Which skin condition results in macules that appear reddish or tan in lighter skin instead of pale?
What is the term for the somewhat bluish color visible in toenails and toes due to impaired venous return?
What is the term for the somewhat bluish color visible in toenails and toes due to impaired venous return?
What condition is characterized by a red hue and increased blood flow, like the 'slapped cheeks' of erythema infectiosum?
What condition is characterized by a red hue and increased blood flow, like the 'slapped cheeks' of erythema infectiosum?
What skin condition results in a diffusely yellow appearance and is most easily seen in the sclera?
What skin condition results in a diffusely yellow appearance and is most easily seen in the sclera?
What dietary factor can lead to a yellowish palm, known as carotenemia?
What dietary factor can lead to a yellowish palm, known as carotenemia?
What is the term for a slightly but uniformly pigmented macule or patch with an irregular border, usually benign?
What is the term for a slightly but uniformly pigmented macule or patch with an irregular border, usually benign?
How can one distinguish carotenemia from jaundice based on the color change's effect on the eyes?
How can one distinguish carotenemia from jaundice based on the color change's effect on the eyes?
Study Notes
Skin Conditions and Their Characteristics
- Vitiligo: Characterized by depigmented macules that may merge into larger areas devoid of melanin.
- Tinea Versicolor: Hypopigmented, slightly scaly macules are primarily found on the trunk, neck, and upper arms.
- Heliotrope Rash: A violaceous eruption over the eyelids associated with dermatomyositis, indicating possible underlying muscle disease.
Types of Skin Lesions
- Vesicle: A type of skin lesion that contains serous fluid, often presenting as small blisters.
- Wheal: Refers to a superficial, localized area of skin edema that is often transient and can result from allergic reactions or insect bites.
Color Changes in Skin Conditions
- Tanning Response: Certain skin conditions can cause macules that appear reddish or tan in lighter skin tones, differentiating them from the paler lesions seen in other conditions.
- Cyanosis: The bluish hue in toenails and toes, indicative of impaired venous return or poor oxygenation.
Erythema and Jaundice
- Erythema Infectiosum: Noted for a red hue and increased blood flow, often referred to as 'slapped cheeks' appearance in children.
- Scleral Icterus: Characterized by a diffusely yellow appearance primarily visible in the sclera, indicating elevated bilirubin levels due to jaundice.
Dietary Influences
- Carotenemia: Can cause yellowing of the palms and skin due to excessive dietary beta-carotene, which does not affect the sclera like jaundice.
Distinguishing Carotenemia from Jaundice
- Carotenemia vs. Jaundice: Carotenemia leads to a yellowish tint without affecting the sclera, while jaundice causes yellow discoloration that is also visible in the eyes, particularly in the conjunctiva.
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Description
This quiz explores skin color changes related to cyanosis, erythema, and carotenemia through visual examples and descriptions. Learn to differentiate between these conditions and normal skin color variations.
