بسم الله الرحمن الرحيم
Dr.Rzan A.
]ACNE VULGARIS
Objectives:
Explain etiology and Pathogenesis of Acne vulgaris. Label different types of Acne. List available modalities to treat acne. Compare acne to rosacea.Acne vulgaris
Definition: a chronic inflammatory disease of pilosebaceous unit. It is a polymorphic disorder(comedons, papules , pustules, nodules, pseudocysts, and sometimes scarring) The sites of predilection face, upper trunk and upper arms. It usually affect adolescent. is of multifactorial aetiology.The etiology and Pathogenesis of Acne vulgaris:
I – Increase sebum production. II- Obstruction of the pilosebaceous duct (comedogenesis). III- Colonization of the duct with (P.acnes). IV- The production of inflammation.All these occurs on a hormonal background ofAndrogen.Clinical Presentation of Acne:
The types of lesions in Acne: A – Non inflammatory lesions: (comedones) which consist of: White heads (closed comedones). Black heads (open comedones). B – Inflammatory lesions include: The superficial lesions are usually papules and pustules. The deep lesions are deep pustules, nodules and pseudocysts & Sinusesذ
Other factors affecting the pathogenesis:
A. Endogenous factors Genetics. Stress and anxiety.++ Menstruation.+B- Exogenous factors: UV. radiation. Hot humid environment and sweating.+Diet.*’’Occupation.
Acne varients
Pomade acne Cosmetic Acne. Acne venenata. Drug induced acne. Endocrine acne. Acne astevalisNeonatal acne
Persistent acneComplications of acne: 1- Scarring. 2-Psychological impact. Types of acne scarring: Atrophic scars. Ice pick scars. Hypertrophic scars. Keloid scars. .
Differential diagnosis of acne:
1-Rosocea. 2-Perioral dermatitis. 3-Pitrosporum folliculitis. 4-Folliculitis barbae and Psudofolliculitis barbae. 5-Acneform drug eraption 6-Acneform secondary syphilis.Treatment of Acne:
A-General measures. B-Topical treatment. C-Systemic therapy. The choice of therapy. Mild acne:topical therapy. Moderate acne:topical and oral therapies. Severe acne: isotretinoin unless it is contraindicated.A - General measures: Reassurance. Education. Avoidence of comedogenic applications. Avoid squeezing the lesions. Gentle cleansing.
Topical antibiotics: erythromycin (1.5-2% gel or cream). clindamycin (1% lotion) Benzyl peroxide.
B- Topical treatments: 1- Those directed towards microorganisms. 2- Those directed towards comedogenesis.
2-Topical treatment directed towards comedogenesis:
Retinoids: 1- Anti-seborrheic effect. 2- Anti-comedonal effect. 3- Anti-inflammatory effect. 4- Inhibiting the growth of P. acne . Tretinoin may be used as solution, cream or gel. It is available in 0.025% , 0.05% and 0.1% concentration (2). Tazarotene (0.1% gel) applied once daily. Adapalene: Adapalene (0.1% gel). Azelaic acid: cream with 20%C) Systemic Treatment of acne:
1-Those directed against microorganisms (antibiotics). 2-Those directed against comedogenesis and seborrhea (retinoids). 3-Those acting on hormonal bases (antiandrogens).Systemic antibiotic: * Moderate or severe inflammatory acne. *Acne resistant to topical treatment. *Acne that covers large area of the body. Tetracycline: Tetracycline dose for an adult is 250 mg four times daily. Doxycycline: It is usually given in a dose of 100 mg once or twice daily . Minocyclin: The usual dose is 50-100 mg once or twice daily. Erythromycin and Azithromysin: Clindamycin: In a dose of 75-150 mg.
2- Systemic Retinoids:
(Isotretinoin) is the single most effective treatment. Indications: 1- Severe acne. 2- Moderate unresponsive acne. 3- Acne with scarring. 4- Acne with severe depression or dysmorphophobia. 5- High sebum excretion rate. 6- Some unusual variants, such as acne fulminans, gram-negative folliculitis .3- Hormonal therapy:
Acne is not responding to conventional therapy. If there are signs of hyperandrogenism. A- Androgen production inhibitors: glucocorticoids and oral contraceptives. B-Androgen receptor blockers: cyproterone acetate, spironolactone and flutamide.
acne vulgaris
MILDRosacea
Rosacea (Latin: “like roses”) is a chronic inflammatoy disorder of the facial pilosebaceous units, with an increased reactivity of capillaries to heat, leading to flushing and telangiectasia... Age of incidence between 30 to 50 years, Sex Females predominantly; Race WHITE peoples.DISTRIBUTION Characteristic is a a symmetrical localization on the faceSkin Symptoms/ facial appearance?; Flushing, “heat” in the face. Stages of Evolution // episodic (flushing) in response to (hot liquids), spicy foods; alcohol ,exposure to sun, heat and emotional stress. *Episodic erythema, “flushing and blushing” Stage I: Persistent erythema with telangiectases Stage II: Persistent erythema, telangiectases, papules, tiny pustules Stage III: Persistent deep erythema, dense telangiectases, papules, pustules, nodules; marked sebaceous hyperplasia edema of the central part of the face "glandular rosacea"causing disfigurement of the nose {Rhinophyma (enlarged nose) }
Eye Lesions/// “Red” eyes ,chronic blepharitis, conjunctivitis, and episcleritis. Rosacea keratitis Differential Diagnosis Acne, (note: in rosacea No comedones) Perioral dermatitis, folliculitis, and SLE Dermatopathology 1-Dilated capillaries.2-Marked sebaceous gland hyperplasia 3-Inflammatory infiltrate with foci of neutrophils within the follicle 4 -epithelioid granuloma without caseation,
Course Prolonged. Recurrences are common. After a few years, the disease tends to disappear spontaneously. Management Reassurance. Reduction of alcoholic and hot beverages. Topical :\Metronidazole gel or cream, 0.75 %, twice daily orTopical antibiotics (e.g., erythromycin gel).
Systemic: oral antibiotics: Tetracycline, 250mg 4td. until clear; then gradually reduce to once-daily doses of 250 to 500 mg. Minocycline and doxycycline, 50 to 100 mg twice daily. Oral Isotretinoin
Acne
RosaceaONSET
ADOLESCENCE
THIRTIEs TO FIFTIES
2.SEX
MALE>.F
FEMALES.>MALES
3.SITE
FACE,UPPER TUNCK, UPPER ARMS
FACE
4.FLUSHING&TELEANGECTASIa
_
+
5.Comedons
+
_
6.Eye complecations
_-----
+
7.Rhinophyma
_
+
8.Responce to treatment
slow
rapid