Summary

This document provides an overview of various eczema/dermatitis conditions, including dyshidrotic eczema, lichen simplex chronicus, nummular eczema, and contact dermatitis. It outlines clinical features, causes, symptoms, and treatment strategies for each condition. The document is suitable for medical professionals or those studying dermatology.

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Overview Dermis: hair follicles, nerve endings, sweat glands and connective tissue Skin Cell Formation: Diagnosis Criteria (CLAMPS TN): 1.​ Cell division: keratinocytes divide in the 1.​ Color deepest (basal) layer 2....

Overview Dermis: hair follicles, nerve endings, sweat glands and connective tissue Skin Cell Formation: Diagnosis Criteria (CLAMPS TN): 1.​ Cell division: keratinocytes divide in the 1.​ Color deepest (basal) layer 2.​ Location/distribution (extent, pattern) 2.​ Cell differentiation: as cells move up in the 3.​ Arrangement (grouped vs disseminated & dermis, they change shape and composition confluence (yes or no)) 3.​ Keratinization: cells secrete keratin 4.​ Margination (well or ill-defined) proteins and lipids to form a matrix that 5.​ Palpation (consistency, temp, mobility, protects the skin and gives it strength tenderness, depth) 4.​ Desquamation: the outermost layer of skin 6.​ Shape cells die and shed off from the skin 7.​ Type (papule, macule, pustule) 8.​ Number: single vs multiple (# of lesions) Papulo-Squamous Diseases ❖​Eczema/Dermatitis ❖​Dyshidrotic Eczema ❖​Lichen Simplex Chronicus ❖​Nummular Eczema ❖​Contact Dermatitis ❖​Stasis Dermatitis ❖​Atopic Dermatitis ❖​Seborrheic Dermatitis ❖​Perioral Dermatitis ❖​Fixed Drug Eruption ❖​Lichen Planus ❖​Pityriasis Rosea ❖​Psoriasis Eczema/Dermatitis Overview What? ❖​ Inflammatory reaction of epidermis & dermis ❖​ “The itch that rashes” Etiology ❖​ Multiple etiologies ❖​ Wide range of clinical findings Symptoms ❖​ Hyperkeratosis ❖​ Scaling ❖​ +/- fissuring Acute ❖​ Pruritus ❖​ Erythema ❖​ Vesiculation Chronic ❖​ Pruritus ❖​ Xerosis ❖​ Lichenification Eczema/Dermatitis Dyshidrotic Eczema Lichen Simplex Chronicus What Clinical Features ❖​ Localized lichenification in circumscribes ❖​ Acute, chronic, and recurrent plaques ❖​ Fingers, palms, soles ❖​ Thickened skin, excoriations ​ Lateral fingers and toes ❖​ Usually >20 y/o ❖​ F>M ❖​ Chronic - usually relapsing Symptoms ❖​ Sudden, deep-seated pruritic, clear “tapioca-like” vesicles Cause ❖​ Repetitive rubbing and scratching Complications ❖​ Painful when erosive Common Sites: ❖​ May develop bullae ❖​ Scalp, neck, extensor forearms, scrotum, and lower legs Treatment ❖​ Strong steroids Treatment ❖​ IL steroids ❖​ D/c scratching! ❖​ Severe cases: PO prednisone ❖​ Occlusive bandages ❖​ Topical steroids ❖​ Tar preps ❖​ IL steroids (small lesions) ❖​ PO hydroxyzine Eczema/Dermatitis Nummular Eczema Contact Dermatitis What? What? ❖​ Acute or chronic ❖​ Chronic Inflammatory ❖​ Etiology unknown ❖​ Most > 50 y/o Causes ❖​ M>F ❖​ Irritant: chemical (ex. hands) ​ Soaps, detergents, solvents Symptoms ❖​ Allergic: ​ nickel/jewelry, plants ❖​ Coin-shaped plaques of grouped small ❖​ **plastics, chemical residues on clothes, papules and vesicles on erythematous plants base ❖​ Working in the yard? Plant exposure? ❖​ Highly pruritic ❖​ Most common in legs and upper extremities Symptoms ❖​ Stinging, itching, burning, pain with Treatment fissures, weeps, crusting ❖​ Moisturizer ❖​ Topical steroid Presentation ❖​ PUVA or UVB (sunlight) ❖​ Well-demarcated erythema and edema, non umbilicated vesicles or papules Treatment ❖​ Remove etiologic agent ❖​ Wet dressings (Burrow’s solution - OTC) ❖​ Topical glucocorticoids ❖​ PO prednisone (if severe) Eczema/Dermatitis Stasis Dermatitis Atopic Dermatitis What? What? ❖​ Related to venous insufficiency ❖​ **not cellulitis** ❖​ Acute, subacute, chronic relapsing ❖​ Common in infancy, itch-scratch cycle ❖​ Frequent w/ personal or FHx AD, *Physical Exam* allergic rhinitis, & asthma ❖​ Skin barrier dysfunction, IgE reactivity ❖​ Inflammatory papules ❖​ Infantile, child, & adults types ❖​ Hyperpigmentation ❖​ Scaly and crusted erosions in lower legs and ankles Eliciting/Exacerbating Factors ❖​ Inhalants, microbials, aeroallergens, Treatment foods, season (winter), and emotional stress ❖​ Avoid scratching ❖​ Emollients throughout the day ❖​ Topical corticosteroids Symptoms ❖​ Wrap legs/compression stockings ❖​ Dry skin, pruritus ❖​ “The itch that rashes” ​ Itch > scratch > rash > itch > scratch > rash ❖​ Poorly defined erythematous patches, papules, & plaques with or without scaling *Treatment* ❖​ Avoid scratching ❖​ Wet dressings ❖​ Topical steroids ❖​ Topical or PO antibiotics ❖​ Hydration ❖​ Emollients ❖​ Topical calcineurin inhibitors ❖​ PO H1 antihistamines ❖​ PO steroids only for severe intractable cases Eczema/Dermatitis Seborrheic Dermatitis Perioral Dermatitis Risk Factors Risk Factors ❖​ Female 20-45 ❖​ Ages: infancy, puberty, 20-50 y/o ❖​ Fluoridated toothpaste ❖​ M>F ❖​ Topical corticosteroids ❖​ Worse in fall/winter (dry environment and stress) ❖​ Summer: worse in some, better in others Distribution ❖​ Common in immunosuppressed - HIV, Parkinson’s, nutritional deficiencies ❖​ Periorbital skin (zinc) ❖​ Spares the vermillion border Distribution Physical Exam ❖​ Scalp, face, genitalia, and body folds ❖​ Erythematous grouped papulopustules ❖​ “Cradle cap” - yellow greasy scales on that may become plaques with scales scalp ❖​ Can have satellite lesions ❖​ Often seen in hair bearing regions ❖​ May include perinasal and periorbital skin (eyebrows, central face, scalp) - looks like dandruff Treatment Physical Exam ❖​ Eliminate steroids and irritants ​ Cosmetics, skin care products ❖​ Pruritus ❖​ Topical metronidazole, erythromycin, or ❖​ Red plaques pimecrolimus ❖​ Greasy looking ❖​ Yellowish scales may be present on areas w/ plethora of sebaceous glands Treatment ❖​ Selenium sulfide (Selsen BLUE, Head and Shoulders) ❖​ Topical antifungals ❖​ Tar shampoo (neutrogena T-gel) ❖​ Mild topical steroids Eczema/Dermatitis Seborrheic Dermatitis Lichen Planus What? What? ❖​ Acute or chronic inflammation involving ❖​ Adverse cutaneous reaction to ingested skin or mucous membranes drug ❖​ 30-60 y/o ❖​ Resolves in a few weeks after d/c ❖​ F>M offending agent ❖​ Idiopathic Distribution Distribution ❖​ Solitary (or multiple) erythematous patch ❖​ Flexor creases of arm and legs or plaque ❖​ Usually asymptomatic ​ May have some pruritus, pain, or Symptoms burning ❖​ Sharpy demarcated macule, round or oval ❖​ 4 P’s: ​ Initially red, then dusky red ​ Papule to violaceous ​ Purple ​ May evolve to bulla, then erosion ​ Polygonal ​ Pruritic Causes *Treatment* ❖​ TCN ❖​ Sulfa ❖​ Topical or PO steroids ❖​ NSAIDs ❖​ Cyclosporine ❖​ OCPs ❖​ Others such as barbiturates, quinine, yellow food coloring *Treatment* ❖​ D/c drug ❖​ Topical steroids (non-eroded) ❖​ Antibiotic ointment (eroded) ❖​ PO steroids for severe mucosal lesions Pityriasis Rosea What? ❖​ Resolves spontaneously in 6-12 weeks ❖​ Acute rash, self-limited course ❖​ More common in the fall Etiology ❖​ Reactivation of HSV-7 & HSV-6 Symptoms ❖​ Initial: ​ Single, primary herald patch usually on trunk (80% of pts) ❖​ Secondary: ​ Eruption 1-2 weeks later ​ Fine scaling papules and patches in “christmas tree” pattern (lines of cleavage) on back ❖​ Herald patch: oval, salmon-red plaque or patch 2-5 cm with fine collarette peripheral scale Treatment ❖​ PO or topical antihistamines ❖​ Topical steroids ❖​ UVB phototherapy or natural sunlight ❖​ PO steroids Psoriasis Guttate Psoriasis History Taking What? ❖​ Usually a + FHx ❖​ All ages ❖​ Drop-like scattered (scaly) red to pink ❖​ M=F lesions - diffuse ❖​ Worse with stress, obesity ❖​ Often preceded by strep infection ❖​ +/- joint pain - psoriatic arthritis ❖​ Usually in children or young adults 10 days ❖​ Macule >papule > vesicles and bullae ❖​ Hands , feet, palms, soles, elbows, knees, mouth, torso, face, genitals Stevens-Johnson Syndrome / Toxic Epidermal Necrolysis What? Management ❖​ Acute life-threatening ❖​ Admit to ICU or burn center + d/c mucocutaneous reaction offending agent/drug ❖​ Necrosis and detachment of epidermis ❖​ IV fluids and electrolytes (treat as burn ❖​ Differ by % of body surface involved pt) ❖​ SJS < 10 % epidermal detachment ❖​ Narcotics for pain ❖​ TEN > 30 % epidermal detachment ❖​ Systemic glucocorticoids controversial (overlap 10-30%) ❖​ IVIG (if started early) ❖​ 90% of the time, mucous membranes ❖​ Surgical debridement not recommended affected - ocular, oral, and genital ❖​ Lasts approx 8-12 days ​ Rarely present on palms/soles Risk Factors ❖​ Higher incidence in HIV and active cancer ❖​ F>M ❖​ Often idiopathic or drug induced: anti-seizure meds, sulfa, allopurinol, NSAIDs Presentation ❖​ Usually 4 days to 4 wks after drug exposure ❖​ Fever, malaise, and arthralgias (flu like sx) for 1-3 days then… ❖​ Skin is sloughing off and painful - burning, paresthesia, etc - conjunctival burning/itching, and painful mouth lesions ❖​ Lesions: ill-defined, coalescing, Nikolsky Sign erythematous macules w/ purpuric centers or diffuse erythema ❖​ The ability to extend the area of ​ Pain out of proportion superficial sloughing by applying gentle ❖​ Lesions usually start on face and thorax lateral pressure on the surface of the skin and symmetric at an apparently uninvolved site ❖​ Pathognomonic for pemphigus - TEN Vesicular Bullae ❖​Bullous Pemphigoid ❖​Pemphigus Bullous Pemphigoid What? ❖​ Autoimmune disease of elderly pts (60-80 years) Symptom ❖​ Pruritic, large, tense, bullae scattered but also in groups ❖​ Often started with urticarial eruption ❖​ Don't rupture as easily as pemphigus Distribution ❖​ Axillae ❖​ Medial thigh ❖​ Groin ❖​ Flexor UE ❖​ Lower LE ❖​ Can be in the mouth Treatment ❖​ PO or topical steroids 50 - 100 mg OD ❖​ Immunosuppressives Pemphigus What? ❖​ Chronic or acute ❖​ Bullous autoimmune disease ❖​ Adults 40-60 Symptoms ❖​ Usually starts in mouth ❖​ No pruritus ❖​ Burning and painful Distribution ❖​ Scalp ❖​ Face ❖​ Chest ❖​ Axillae ❖​ Groin ❖​ umbilicus Physical Exam ❖​ Vesicles and bullae ❖​ Easily rupture ❖​ Flaccid and weeping ❖​ + Nikolsky sign Treatment ❖​ Dermatologist ❖​ High dose steroids and immunosuppression Acneiform Lesions ❖​Acne Vulgaris ❖​Rosacea ❖​Folliculitis ❖​Hidradenitis Suppurativa Acne Vulgaris Comedones What ❖​ Open = blackheads ❖​ Closed = white heads ❖​ Inflammation of pilosebaceous units Course Risk Factors ❖​ Often clears by early 20’s ❖​ Primarily young people (on face, trunk, ❖​ Flares in winter and with onset of menses upper arms, and sometimes buttocks) ❖​ More severe in males than females ❖​ Less often in Asians and African Treatment Americans ❖​ Cystic acne can be familial ❖​ Long term goal is scar prevention ❖​ Worse in fall and winter ❖​ Remove plugging, treat bacteria ❖​ Mild: ​ Topical antibiotics (clindamycin Pathogenesis and erythromycin 3%, 5%, BID) ​ Benzoyl peroxide gels 2%, 5%, 10% ❖​ Follicular keratinization, androgens, ​ Bleaches fabrics propionibacterium acnes ​ Can get in combo ​ Topical retinoids: ​ Gradual inc in strength Follicular Plugging from 0.01%, 0.025%, 0.05% cream, gel, liquid, ❖​ (comedone) traps sebum → androgens or ointment produce more sebum → bacteria produce ​ Retinoic acid, Adapalene, inflammatory response tazarotene ​ Can't use if pregnant ❖​ Moderate: same regimen for minor Contributing Factors PLUS ​ PO antibiotics (minocycline ❖​ Meds (lithium, isoniazid, steroids, OCP, 50-100 mg or doxycycline 50-100 androgens) mg BID tapered to 50mg as acne ❖​ Stress lessens) ❖​ occlusion/pressure (hand on face) ​ Spironolactone 25-50 mg QD ❖​ Cosmetics, pomade, sweat ❖​ Severe: same as above w/ PO isotretinoin for cystic or refractory acne ❖​ PO isotretinoin - complete remission Presentation for months to years - inhibits sebaceous gland function and keratinization ❖​ Seen with comedones (must have for ​ Extremely teratogenic diagnosis) cysts, pustules, and/or ​ NEED effective contraception + 2 nodules negative preg test prior ❖​ Can result in pits, depressions, scars, or ​ Pseudotumor cerebri when used in hyperpigmentation combo w/ tetracycline ❖​ Nodulo-cystic type can be painful ​ Can cause elevated triglycerides & mild - mod elevations of transaminases ​ Dry skin & mucosa ​ Can cause depression Rosacea What Treatment ❖​ Chronic inflammation of facial ❖​ Reduce of eliminate alcohol & caffeine pilosebaceous units ❖​ Metronidazole gel or cream, ivermectin ❖​ Recurrences common; usually lifetime cream ❖​ 30-50 y/o ❖​ Topical antibiotics ❖​ F>M ❖​ PO antibiotics better than topical (minocycline, doxycycline, TCN) - papulopustular rosacea Physical Exam ❖​ PO isotretinoin for severe disease ❖​ Surgery for rhinophyma ❖​ Episodic erythema ❖​ Telangiectasia (lasers) ​ “Flushing and blushing” ❖​ Stages I, II, III: ​ Persistent erythema, telangiectasis, papules, tiny pustules, nodules ❖​ No comedones Triggers ❖​ Hit liquids, spicy foods, alcohol/wine, aged cheese, exposure to sun & heat, stress Duration ❖​ Days, weeks, months Late Stage ❖​ Rhinophyma ❖​ Metophyma ❖​ Blepharophyma ❖​ Otophyma ❖​ Gnatophyma Distribution ❖​ Symmetric on face ❖​ Rarely on neck, chest, back and scalp Folliculitis What? ❖​ Inflammation or infection of superficial hair follicles ❖​ More common males Etiology ❖​ Most common staph aureus ❖​ Hot tub → pseudomonas aeruginosa Risk Factors ❖​ Prolonged antibiotic use ❖​ Topical corticosteroids ❖​ Hot tubs Presentation ❖​ Perifollicular papules and /or pustules w/ surrounding erythema ❖​ Hair bearing skin ❖​ Often pruritic Treatment ❖​ Benzoyl peroxide wash (bleaches) ❖​ Topical mupirocin, clindamycin, erythromycin ❖​ If no improvement → PO cephalexin Hidradenitis Suppurativa What? Pathogenesis ❖​ Chronic, suppurative ❖​ Follicle plugging > dilated follicle & ❖​ Apocrine gland skin apocrine ducts > inflammation > bacterial growth > extension of suppuration/tissue destruction > ulceration, fibrosis, sinus Etiology tracts > scarring ❖​ No known etiology Treatment Distribution ❖​ Usual spontaneous remission at > 35 y/o ❖​ Intralesional steroids then I&D abscess ❖​ Axillae, inguinocrural, anogenital, ❖​ Prednisone for severe pain and inframammary, rarely scalp inflammation ❖​ F (axillae) > M (anogenital) ❖​ Surgery (excision, skin grafting) ❖​ Isotretinoin for early disease ❖​ Adalimumab (Humira) Risk Factors ❖​ Psychological ❖​ Obesity, smoking, genetic predisposition to acne ❖​ FHx: NC acne & NS Presentation ❖​ Lesions: ​ Tender open & double comedones ​ Red nodules/abscesses ​ Sinus tracts ​ “Bridge” scars ​ Hypertrophic & keloidal scars ​ Contractures

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