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ACNE Disorders of sebaceous gland. Omar Abdulaziz Al-Sheikh, M.D. College of Medicine King Saud University. Definition:.
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ACNEDisorders of sebaceous gland Omar Abdulaziz Al-Sheikh, M.D. College of Medicine King Saud University
Definition: Is a chronic inflammatory disorder of the pilosebaceous apparatus of certain body area (Face> Torso > rarely the Buttocks), resulting in greasiness and polymorphic skin eruption.
Incidence: Acne affect all skin types, the male and female ratio is virtually the same but tend to be more severe in males. 85% affect the age group 12 – 24 years 8% affect the age group 25 – 34 years 3% affect the age group 35 – 44 years
Etiology: • Genetic Aspect, (Acne runs in family) other example the case of severe acne that is associated with XXY syndrome. • Occupation (Environmental, Mechanical) e.g. exposure acnegenic mineral oil (Pomade acne) dioxin • Drugs Oral and topical Hydrocortison (Steroid acne) Lithium, Hydantoin, contraceptives • Endocrine Factors (Recalcitrant Acne, POD/s, MARSH Syndrome) .
Pathogenesis: ( three main steps recognized and hypothesized) 1.Follicular Hyperkeratosis (the cause not fully understood) theory suggest: • deficiency in Linoleic acid, • the effect off 5-a reductase enzyme on converting Androgen (Testosterone) hormone to the active acnegenic and potent (Dihydrotestosterone) DHT, • the direct effect of Interleukin-1 on follicular hyperkeratosis
Fig 1 Fig 2 Fig 3 Perifollicular Hyperkeratosis histology
Seborrhoeais a common feature between patients with acne. 2.Abnormal production of abnormal sebum increasing the ratio of wax easter to cholesterol and cholesterol easter and is believed to be the response of sebaceous glands to DHEA
3. Colonization of the affected unit with bacteria Propionibacteriumacne and yeast named Malassezia furfur Fig 4 Fig 5 Malassezia furfur Propionibacterium acne
P acne is potent activator of complement via classical pathway Fig 6 Fig 7
Propionobacterium acne lipases act on sebaceous fatty acid (Triglycrides) to release irritant free fatty acid and low-molecular- weight peptide an extra cellular factor that penetrate the follicular wall and stimulate Polymorphs and Lymphocytes initiating inflammation Fig 8
Hydrolytic enzymes released from the activated complement antibodies complex together with exoenzymes produced from P acne cause rupture of follicular wall Fig 9
Once the wall is damaged Various agents (prostaglandin-like substance, amino acid, short chain fatty acid are) that are produced by the inflammatory cells and P acne extrude to the dermis causing more inflammation
Clinical features: (Acne and acne related Disorders) • Acne Vulgaris: Papules: (Less than 0.5 cm) • Comedones (Open “Blackheads” or closed “Whitheads”)
Open Comedones (Blackheads) Fig 10 Fig 11 Open Comedones
Closed Comedones (Whitehead) Fig 12 Fig 13 Closed Comedones
Inflammatory papules Fig 14 Fig 15 Inflammatory papules
Pustules : Fig 16 Fig 17 Pustules
Nodule (more than 0.5 cm) Fig 18 Fig 19 Nodule
Cystic acne: the cysts are usually large 1-4cm Fig 20 Fig 21
2.The nodules and cysts could be associated with sinuses as in Acne inversea • Acne inversea (Hidradinitis supprativa “a misleading name”) because it is considered by some to be disorder of apocrine gland (Sweat gland) but In my opinion Acne inversea affect primarily pilo Seb. Unit and affect secondarily the sweat gland, hence the correct name Acne inversea rather than Hidradinitis supprativa is preferred.
3.Neonatal Acne and Infantile Acne • Neonatal acne: cause unknown but some believed is due to passing of Transplacental androgen other suggest the role of Mlalassezia furfur and sympodalis . affect 1 in 5 mainly inflammatory comedones on nose and cheeks affect new born between the 1st and 6th week of age
Infantile Acne: affect males more than females, usually between 3 and 6 months of age, and tend to be severer than the neonatal one and believed to be due to Endogenic androgen from the infant’s gonads.
4. Recalcitrant Acne Affect Women and associated with (Adrenal hyperplasia "11-B- or 21-B hydroxlase deficiencies) acne is usually nodulocystic
5. Acne Fulminans Affect youngsters 13 – 17 years of age, very severe with ulceration and puss discharge, associated symptoms include (fever malase myalgia arthritis and bone pain) laboratory investigation shows ESR Can be induced by starting the patient on high dose of isotretinion (Roaccutane).
6. Acne Conglobata Very severe Acne, Nodulocystic form with abscess formation, affect Torso more than the face, usually associated with XYY Syndrome.
Fig 26 Fig 27
7. Acne Agminata (Lupus Milliaris Disseminatus Faciei) Some believe it is form of Rosacea (Granulomatous type), diagnosis is made at Histological base, Caseating Granulomata at the dermal level.
8. Acne as part of other syndromes • MARSH Syndrome (Melsma, Acne, Rosacea, ,Seborrhoeic eczema, and Hirsutism) • Acne Conglobata • Favre Racouchot syndrome elderly with elastosis as part of Helioderma, sun exposure is a predisposing factor. • Polycystic ovarian syndrome • Atrophoderma vermiculatum as part of so called Ulerythema ophryogenes triat in Noonan Syndrome, de Lange Syndrome, and Rubinstein-Taybi Syndrome Not considered acne
9. Occupational I Environmental • Chloracne rare forms of acne affect patients exposed to Halogenated Hydrocarbons or who ingested Chlorinated Phenols (Dioxin) • Pomade acne or known as Oil Folliculitis • Acne Aestivalis or so called Mallorca Acne
Occupational II mechanical acne • Folicullitis Nuchae or so called Acne Keloidalis • Pseudofollicultis barbae • Acne excoriee as part of Psychodermatosis
TRAETMENT • Note: All medications used for the treatment of acne act as: • Anti comedonal • Anti inflammatory • Anti microbial
Topical Keratolytic • Retinoid ( Retinoic acid 0.025, 0.05, 0.1%) • Adapelene (Diffrine 0.1%) • Salicylic acid • Benzoic acid • Azelaic Acid (10, 15, 20 %)
Topical Antibiotic • Topical clindamycin (Dalacin T) • Erythromycin • Mupirocin (Bactroban) • Sodium Fusidic acid (less significant in the treatment)
Systemic therapy • Antibiotic (Macrolides and Tetracyline) • Tetracycline • Doxycycline • Minocycline (Photo sensitivity and LE) • Erythromycines • Clarythromycines • Azithromycine
Systemic Retinoid Isotretinoine caps (Roaccutane) New promising and potentially safe medication SMT D002 Phase I clinical trial Is believed to treat seborrhoea a symptom of Parkinson's disease and the primary cause of acne
Other form of therapy • Systemic steroid (Prednisolone) acne fulminans and intralesional steriods for forms of cystic acne. • Photodynamic therapy i.e. Laser therapy and phototherapy (Less significant) • Hormonal therapy (Antiandrogen) Spironlacton (Potassium sparing agent) and Metformin as (Hypogylcemic agent) in treatment of POS have good results on acne
Fig 1, 2 www.scf-online.com/.../keratinization38_e.htm keratinization of the duct of the hair follicle. www.nlm.nih.gov/.../ency/imagepages/2087.htm open (Blackheads) comedones, Medical Encyclopedia Fig.3 Fig 4. Malassezia furfur www.doctorfungus.org/thefungi/Malassezia.htmClosed comedones Skin and allergy centre. Fig 5 Fig 6 www.ohiohealth.com/bodymayo.cfm?id=6&action=t... Mayo Foundation for Medical and research. Fig 7 Fig 8 bacterial colonization www.healthcaresouth.com/pages/acnewhatis.htm Fig 9 Breakage of follicular wall www.healthyskinbydesign.com/acne.cfm papule Fig 10 open comedones www.healthcaresouth.com/pages/acnewhatis.htm Fig 11 Fig 12 closed comedones www.healthcaresouth.com/pages/acnewhatis.htmfig www.dermalogix.net/acne/acne.html open and closed comedones schematic pictures www.dermalogix.net/acne/acne.html proriobionacterium acne in pilosabaceous unit www.healthyskinbydesign.com/acne.cfm. follicular hyperkeratosis in acne Fig 13 Fig 14 Fig 15 Fig 16 www.healthyskinbydesign.com/acne.cfm pustule Fig 17. Courtesy of Skin and allergy centre Fig 18 www.healthyskinbydesign.com/acne.cfm nodule Fig 19 nodule www.acnekil.com/What's_Acne/photo_gallery2.htm Fig 20 Fig 21 Courtesy of Skin and allergy centre Fig 22 Courtesy of Skin and allergy centre Fig 23 www.adhb.govt.nz/.../BenignLesions.htm at neonatal dermatology benign lesions Auckland district health board. Fig 24 http://www.virtualendocrinecentre.com/diseases.asp?did=860 (infantile) Fig 25 Fig 26 Courtesy of Skin and allergy centre Fig 27 Acne conglobata www.consultantlive.com/showArticle.jhtml?arti... Fig 28 acne Agminata Granulomatous rosacea in infants. Report of three cases and discussion of the differential diagnosis João Borges da Costa, Sousa Coutinho V, L Soares de Almeida, M Marques Gomes PhDDermatology Online Journal 14 (2): 22
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