common dermatolgical conditions in adult · pdf filepruritus •epidemiology •very...
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Common Dermatological Conditions in Adults in Ghana
Margaret Lartey FWACP
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Outline
• Introduction
• Two Common disorders
• Discussion
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Case 1
• 34 yr old female
• C/o pruritus of 2 months duration
• First episode
• Seen GP
• Prescribed ceterizine for 2 weeks
• Completed tablets but still itching
• Referred dermatologist
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Pruritus
• Epidemiology
• Very common
• Pathophysiology
• Complex, interplay of peripheral and central receptors and many chemical agents
• Pattern of itching
• Localised or generalised but ear canals, eyelids, nostrils perianal and genital areas more susceptible to pruritus
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Aetiology
• Dermatological causes – Eczema – Lichen planus – Scabies – Pediculosis – Insect bites – Cutaneous Larva Migrans – Urticaria – Drug eruptions – Dermatitis herpetiformis – Bullous pemphigoid – Prurigo – + localized ones like pruritus vulvae or ani
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• Non dermatological causes – Drugs-opiates and derivatives, chloroquine
– Haem-primary polycythaemia, IDA
– Hepatic-extra hepatic obstruction, cholestasis of pregnancy, drugs, PBC
– Renal disease-CKD
– Malignancy-lymphomas, leukaemia
– Endocrine-hyper/hypothyroidism
– psychological
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• History
• Basic Minimum
– Duration
– Site
– With or without rash
– Aggravating/releasing factors
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• Physical examination
• Examination in well lit room
• Good exposure
• General exam if indicated
• Systemic examination
• Normal skin-dermographism
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Laboratory investigations
• Battery of Investigations??
• Focused investigations??
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Treatment Modalities
• Not all pruritus responds to antihistamines which are very useful in urticatia and histamine mediated pruritus
• Topical/Systemic steriods have limited value and should be used when indicated.
• Topical antihistamines • Lotions containing phenol, menthol or camphor may
be effective • Amitriptyline, doxepin • Naloxone • Cholestyramine
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Urticaria
• Definition-Transient, itchy, (red) swellings of the skin and mucous membranes secondary to the release of histamine and other vasoactive agents from granules within mast cells
• Histology-vasodilatation, dermal odema with mild perivascular infiltrates
• Clinical Features-itchy, varying colour and sizes of wheals not lasting more than few hours, occurring in crops and worse in areas of pressure.
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Causes
• Anything under the sun!!!
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Types
• Acute<2months, chronic>2 months
• Physical Urticarias
– Pressure
– Solar, cold, heat
– Aquagenic
– Cholinergic-very tiny wheals sometimes difficult to see in response to exercise, emotion sweating and hot food. Common in young people
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Diagnosis
• If wheals are not present can be demonstrated by the presence of dermographism
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Laboratory investigations
• Most often non rewarding and DEFINITELY NOT STOOL MICROSCOPY (Routine Examination)
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Management
• Prophylactic Antihistamines
• Must be taken regularly and NOT prn or when the rash appears
• Doses can be stepped up
• After urticaria has cleared COMPLETELY tail off antihistamines watching carefully for recurrence.
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Acne Vulgaris
• Epidemiology • common inflammatory skin disorder commonly
occurring during adolescence. • It is a disorder of the pilo-sebaceous gland (oil
glands in the skin). • It can range from very mild to very severe forms • common in adolescents and teenagers due the
following reasons: – There are higher levels of sex hormones at puberty than in younger
children. – These hormones stimulate oil glands in the skin to enlarge.
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Pathophysiology
• Androgenic stimulation of sebacceous glands
• Impaction and distension of the follicles with tightly packed horny cells
• Proliferation of propionibacterium acnes which metabolize sebum to FFA, also staph epidermidis
• Disruption or rupture of follicle into dermis releasing FFA and other irritants resulting in inflammation
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• Can occur in anybody, neonates to adults
• Scarring disease- atrophic, hypertrophic and keloids
• Primary and secondary forms
• Can be exacerbated by steroids (both topical and systemic)
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AGGRAVATING FACTORS
• Genetic factors • Hormonal factors (higher levels of androgenic
hormones) • Diseases of the ovaries (Polycystic ovaries) • Pregnancy • Psychological stress and depression • Certain medications e.g. steriods-creams and tablets • Cosmetics application especially certain moisturizers,
foundation and pomades (watch out for lanolin, petrolatum, vegetable oils, butyl stearate, lauryl alcohol and oleic acid)
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Acne myths
• Diet- nuts, chocolate
• If you did not have acne as an adolescent you cannot have acne as an adult
• Acne and pimples are different diseases
• Acne does not require treatment
• Washing your face often and with cleansers will get rid of acne
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Physical examination
• Lesions commonly of face, upper chest(anterior and posterior) and upper arms
• Closed and open comedomes, papules, pustules, nodules, cysts, scars, hyper and hypo pigmentary changes
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Laboratory diagnosis
• If history suggestive of secondary acne
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Principles of Treatment
• Treatment depends on severity
• Multi drug treatment
• Patient education and buy in
• Treatment is long term
• Plan for complications-scars and pigmentary changes
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Treatment Options
• Long term antibiotics-topical and systemic
• Salycilic acid and azelaic acids-topical
• Hormonal Therapy- oestrogen therapy and anti androgens ((OCP) and high dose oestrogen
• Benzoyl peroxide
• Retinoids- topical
• Steriods- intralesional and acne fulminans
• Systemic retinoids- ISOTRETINION
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Acknowledgements
• Fiesta Organisers
• Dr. S B Ofori for some of photographs
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• Thank you