Skin Conditions Lecture Notes

Fitzpatrick Scale

  • Developed: 1975 by Dr. Fitzpatrick (Dermatologist)

  • Purpose: Classifies skin according to color and reaction to sun exposure, aiding in predicting patient responses to photo-based and ablative treatments.

  • Indications: Helps determine healing capabilities and potential reactions to UV exposure.

Skin Types Based on UV Exposure and Healing

  • Skin Type I:

    • Characteristics: Always burns easily, never tans. Extremely sensitive; typically very fair skin.

    • Common Individuals: Red-headed and blonde individuals with light complexion.

  • Skin Type II:

    • Characteristics: Always burns, tans minimally; sensitive to sun.

    • Common Individuals: Predominantly Caucasian.

  • Skin Type III:

    • Characteristics: Sometimes burns, tans gradually to light.

    • Common Individuals: Fair/Asian skin tones.

  • Skin Type IV:

    • Characteristics: Burns minimally, always tans to moderate brown; minimally sun sensitive.

    • Common Individuals: Oriental, American Indian, Mediterranean, and Latin American descent.

  • Skin Type V:

    • Characteristics: Rarely burns, tans well; insensitive to sun.

    • Common Individuals: Dark brown and light complexion, including African-American and individuals of Indian descent.

  • Skin Type VI:

    • Characteristics: Never burns; deep pigmented and sun insensitive.

    • Common Individuals: Black and dark-skinned individuals.

Glogau Scale for Photoaging

  • I. Mild:

    • Age Range: 28-35

    • Condition: No wrinkles, early photoaging (mild pigment changes), no keratosis.

  • II. Moderate:

    • Age Range: 35-50

    • Condition: Wrinkles in motion, early brown spots, palpable keratosis.

  • III. Advanced:

    • Age Range: 50-65

    • Condition: Wrinkles at rest, obvious discolorations, and visible vessels.

  • IV. Severe:

    • Age Range: 60-75

    • Condition: Severe photoaging, yellow-grey skin, wrinkles throughout.

Skin Assessment Techniques

  • Woods Lamp Assessment:

    • Purpose: Assesses depth of pigmentation using UV light (365nm).

    • Outcome: Epidermal pigmentation is more visible; dermal pigmentation remains unchanged.

  • Facial Imaging:

    • Advantages: No dark room needed, clearer photos, better documentation, and treatment monitoring.

  • Digital Microscope:

    • Advantages: Precise detection, portable, apps available, and efficient for diagnosis.

Dermatologic vs Cosmetic Conditions

  • Dermatologic Conditions:

    • Reflect systemic health issues, usually require therapeutic treatment.

    • Examples: Psoriasis, warts, fungal infections, dermatitis, eczema.

  • Cosmetic Conditions:

    • Relate only to appearance, do not indicate inherent health issues, addressed mainly by dermal therapies.

    • Examples: Telangiectasia, acne scarring, seborrhoeic keratosis, melasma.

Common Dermatologic Skin Conditions

  • Psoriasis

  • Warts

  • Fungal infections

  • Bacterial infections

  • Dermatitis

  • Eczema

  • Acne Vulgaris

  • Rosacea

Common Cosmetic Skin Conditions

  • Telangiectasia

  • Rosacea

  • Acne and post-acne scarring

  • Vitiligo

  • Seborrhoeic keratosis

  • Androgenic alopecia

  • Freckles

  • Solar lentigines

  • Melasma

  • Poikiloderma

  • Elastosis

  • Actinic keratosis

  • Keratosis pilaris

Freckles (Ephelides)

  • Characteristics:

    • Controlled by the MC1R gene; small melanin spots appearing predominantly in fair-skinned and red-haired individuals.

    • Darken in summer, lighten in winter.

Treatment of Freckles

  • Treatment Options:

    • Significant Results: Very superficial chemical peeling (AHAs), superficial chemical peeling (Jessners, TCA), microdermabrasion, IPL, laser.

    • Pigments may return without continued UV protection.

Solar Lentigines

  • Characteristics:

    • Benign lesions from UV exposure; flat or slightly raised, appearing after age 30.

Treatment of Solar Lentigines

  • Treatment Options:

    • Similar modalities as freckles; including IPL and laser treatments.

    • Re-education about sun protection is essential.

Melasma

  • Characteristics:

    • Overproduction of melanin; common during pregnancy.

    • Appears as symmetrical brownish facial pigmentation.

Treatment of Melasma

  • Treatment Options:

    • Very superficial chemical peeling, QS Nd:YAG laser, skin needling.

    • Regular use of sun protection SPF 50+ is important.

Poikiloderma of Civatte

  • Characteristics:

    • Involves thinned epidermis, dilated superficial blood vessels, leading to hyperpigmentation.

Treatment of Poikiloderma

  • Treatment Options:

    • Very superficial and superficial chemical peeling, IPL, laser therapy.

    • Consistent sun protection is crucial.

Solar Elastosis

  • Characteristics:

    • Affects dermis due to UV damage, leading to yellowish, fine wrinkled skin.

Treatment of Solar Elastosis

  • Treatment Options:

    • Similar to other skin conditions; requires sun protection for longevity of results.

Post-Inflammatory Hyperpigmentation (PIHP)

  • Characteristics:

    • Results from skin inflammation; darker skin types are more susceptible.

Treatment of PIHP

  • Treatment Options:

    • Chemical peeling, microdermabrasion, skin needling, topical treatments for pigment control.

Actinic Keratosis

  • Characteristics:

    • Pre-cancerous lesions due to chronic sun exposure; appear scaly or flaky.

Treatment of Actinic Keratosis

  • Options include: PDT, chemical peeling, laser treatments, cryotherapy.

Telangiectasia

  • Characteristics:

    • Visible small blood vessels due to chronic inflammation; often found on the face and legs.

Treatment of Telangiectasia

  • Treatments include IPL, laser therapy, and sclerotherapy.

Rosacea

  • Characteristics:

    • Chronic inflammation leads to redness and visible blood vessels; different stages indicate severity.

Cosmetic Treatment of Rosacea

  • Options: IPL, laser treatment, topical antibiotics.

Acne

  • Characteristics:

    • Influenced by androgen hormones and bacterial colonization, leading to varied presentations.

Treatment of Acne

  • Treatments vary by severity; include chemical peels, laser treatments, topical medications.

Post Acne Scarring

  • Characteristics:

    • Result from inflammation; types include atrophic and hypertrophic scars.

Cosmetic Treatment of Post Acne Scarring

  • Treatments may involve microdermabrasion, laser therapy, and fillers.

Keratosis Pilaris

  • Characteristics:

    • Genetic condition causing small bumps; commonly affects arms and thighs.

Treatment of Keratosis Pilaris

  • Options include light chemical peels, laser therapy, and topical treatments.

Cherry Angiomas

  • Characteristics:

    • Benign growths caused by proliferation of endothelial cells; appear as red domes.

Treatment of Cherry Angiomas

  • Treatment methods include IPL and laser therapy.

Vitiligo

  • Characteristics:

    • Autoimmune condition leading to loss of skin pigment; commonly seen in defined areas.

Treatment of Vitiligo

  • Options include skin needling, cosmetic tattooing, and UVB phototherapy.

Seborrhoeic Keratosis

  • Characteristics:

    • Benign tumors appearing in various sizes and colors; can be found on different body parts.

Treatment of Seborrhoeic Keratosis

  • Options include cryotherapy, chemical peeling, and laser treatment.

Hirsutism

  • Characteristics:

    • Increased hair growth in women due to sensitivity to androgens; manifests in male-pattern areas.

Treatment of Hirsutism

  • Treatments like electrolysis, laser hair removal and hormonal therapies are effective.

Hyperhidrosis

  • Characteristics:

    • Overactive sweating; can be localized or generalized and is often hereditary.

Treatment of Hyperhidrosis

  • Options include MirDry laser treatment, botulinum toxin injections, and topical agents.

Striae

  • Characteristics:

    • Stretch marks resulting from skin changes during pregnancy or rapid growth.

Treatment of Striae

  • Options include skin needling, IPL, and topical retinoids.

Sebaceous Hyperplasia

  • Characteristics:

    • Enlarged sebaceous glands often mistaken for acne; appear as soft yellow bumps.

Treatment of Sebaceous Hyperplasia

  • Often treated with cryotherapy, laser, or surgical excision.

References

  • Barrionuevo et al. (2018), Baumann (2002), Buddenkotte & Steinhoff (2018), various authors on specific conditions and treatment references.