Pediatric Dermatology DDX Deck

Table of Contents:
SECTION 1: BLISTERS (VESICLES AND BULLAE) 1 Herpes simplex infections 2 Varicella and herpes zoster 3 Hand, foot, and mouth disease 4 Impetigo and ecthyma 5 Staphylococcal scalded skin syndrome (SSSS) 6 Linear IgA dermatosis 7 Dermatitis herpetiformis (DH) 8 Pemphigus 9 Pemphigoid 10 Epidermolysis bullosa, non-scarring 11 Epidermolysis bullosa, scarring 12 Epidermolytic ichthyosis 13 Incontinentia pigmenti 14 Diffuse cutaneous mastocytosis 15 Sucking blisters 16 Miliaria 17 Bullous drug reactions SECTION 2: MUCOSAL EROSIONS (BLISTER BASES) 18 Aphthous ulcers 19 Geographic tongue 20 Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) 21 Mycoplasma-induced rash and mucositis (MIRM) 22 Mucosal erosions in immunobullous and hereditary bullous diseases SECTION 3: PUSTULAR LESIONS 23 Erythema toxicum and transient neonatal pustular melanosis 24 Infantile acropustulosis 25 Folliculitis 26 Acne and periorificial dermatitis 27 Pyoderma gangrenosum 28 Acute generalized exanthematous pustulosis (AGEP) SECTION 4: RED PAPULES AND NODULES 29 Furunculosis and cellulitis 30 Necrotizing fasciitis 31 Mycobacterial infections 32 Viral exanthems 33 Gianotti-Crosti syndrome 34 Scarlet fever 35 Kawasaki disease 36 DRESS syndrome 37 Cutaneous larva migrans 38 Papular urticaria and spider bites 39 Scabies 40 Syphilis 41 Erythema multiforme (EM) 42 Fixed drug eruptions 43 Morbilliform and urticarial drug eruptions 44 Erythema nodosum (EN) 45 Panniculitis 46 Dermatofibromas 47 Keloids and hypertrophic scars 48 Angiofibromas 49 Congenital self-healing reticulohistiocytosis (CSHR) 50 Malignant tumors SECTION 5: FLAT VASCULAR LESIONS, BLANCHING 51 Mottling 52 Cutis marmorata telangiectasia congenita (CMTC) 53 Livedo reticularis 54 Urticaria and dermographism 55 Port-wine stains and nevus simplex 56 Vascular spiders 57 Neonatal lupus erythematosus SECTION 6: RAISED BLANCHING VASCULAR LESIONS 58 Hemangiomas 59 Diffuse neonatal hemangiomatosis 60 Tufted angiomas 61 Hemangioendothelioma 62 Pyogenic granuloma 63 Lymphatic malformations 64 Venous malformations SECTION 7: NON-BLANCHING VASCULAR LESIONS (PETECHIAE AND PURPURA) 65 Vasculitis (Henoch-Schönlein purpura) 66 Periarteritis nodosa 67 Pernio 68 Progressive pigmented purpura (PPP) SECTION 8: PAPULOSQUAMOUS ERUPTIONS 69 Pityriasis rosea (PR) 70 Psoriasis 71 Pityriasis lichenoides 72 Lichen planus (LP) and lichen nitidus 73 Pityriasis rubra pilaris (PRP) 74 Lichen striatus 75 Porokeratosis of Mibelli 76 Lupus erythematosus (LE) 77 Dermatomyositis 78 Ichthyosis 79 Darier’s disease (keratosis follicularis) 80 Tinea (dermatophyte infections) SECTION 9: ECZEMATOUS DISORDERS (RED WITH DISRUPTION OF SKIN SURFACE) 81 Atopic dermatitis (AD) 82 Allergic contact dermatitis (ACD) 83 Juvenile plantar dermatosis 84 Nummular dermatitis 85 Seborrheic dermatitis 86 Langerhans cell histiocytosis (LCH) 87 Diaper dermatitis 88 Intertrigo 89 Candidiasis 90 Perianal cellulitis 91 Acrodermatitis enteropathica (AE) SECTION 10: SKIN-COLORED PAPULES AND NODULES WITH A ROUGH SURFACE 92 Warts 93 Epidermal nevi 94 Keratosis pilaris (KP) 95 Corns and calluses SECTION 11: SKIN-COLORED PAPULES AND NODULES WITH A SMOOTH SURFACE 96 Molluscum contagiosum 97 Milia and sebaceous hyperplasia 98 Epidermal cysts 99 Dermoid cysts 100 Pilomatricoma and trichoepithelioma 101 Granuloma annulare 102 Neurofibroma and lipomas 103 Piezogenic papules 104 Sweat gland tumors SECTION 12: WHITE LESIONS 105 Post-inflammatory hypopigmentation and pityriasis alba 106 Vitiligo 107 Lichen sclerosus (LS) 108 Morphea 109 Halo nevus 110 Nevus depigmentosus and linear and whorled nevoid hypomelanosis (LWNH-Blaschkoid hypomelanosis-hypomelanosis of Ito) 111 Nevus anemicus 112 Ash leaf macules 113 Piebaldism 114 Waardenburg syndrome (WS) 115 Oculocutaneous albinism (OCA) 116 Tinea versicolor SECTION 13: FLAT BROWN LESIONS 117 Mongolian spots 118 Nevus of Ota 119 Café-au-lait macules (CALMs) 120 Freckles 121 Lentigines 122 Nevus spilus 123 Junctional nevi 124 Becker’s nevus 125 Post-inflammatory hyperpigmentation 126 Mosaic hyperpigmentation SECTION 14: RAISED BROWN LESIONS 127 Congenital melanocytic nevi (CMN) 128 Intradermal melanocytic nevi 129 Melanoma 130 Pilar and smooth muscle hamartomas 131 Mastocytosis 132 Benign cephalic histiocytosis 133 Acanthosis nigricans (AN) 134 Confluent and reticulated papillomatosis (CARP) SECTION 15: YELLOW LESIONS 135 Nevus sebaceus 136 Juvenile xanthogranuloma (JXG) 137 Necrobiosis lipoidica diabeticorum (NLD) 138 Focal dermal hypoplasia SECTION 16: CONGENITAL CIRCUMSCRIBED HAIR LOSS 139 Aplasia cutis congenita (ACC) 140 Congenital triangular alopecia SECTION 17: ACQUIRED CIRCUMSCRIBED HAIR LOSS 141 Alopecia areata (AA) 142 Tinea capitis and kerion 143 Traction alopecia and hair pulling SECTION 18: CONGENITAL DIFFUSE HAIR LOSS 144 Ectodermal dysplasias (ED) 145 Hair shaft defects 146 Congenital atrichia with papules SECTION 19: ACQUIRED DIFFUSE HAIR LOSS 147 Telogen and anagen effluvium SECTION 20: THICKENED NAILS 148 Congenital malalignment of the great toe 149 Pachyonychia congenita (PC) 150 Ectodermal dysplasia (nails) 151 Median nail dystrophy 152 Trachyonychia (20 nail dystrophy) 153 Psoriasis nails 154 Lichen planus nails SECTION 21: THIN, SLOW-GROWING, OR LOSS OF NAIL 155 Ectodermal dysplasia and nail-patella syndrome SECTION 22: PITTED LESIONS 156 Ear pits and lip pits 157 Pitted keratolysis SECTION 23: INVOLVEMENT OF PALMS AND SOLES 158 Palmoplantar keratodermas (PPK) SECTION 24: PHOTODISTRIBUTION (SUN-INDUCED LESIONS) 159 Sunburn 160 Phytophotodermatitis 161 Polymorphous light eruption (PMLE) 162 Erythropoietic protoporphyria (EPP) SECTION 25: ANNULAR ARRANGEMENTS 163 Annular arrangement SECTION 26: LINEAR OR CURVILINEAR ARRANGEMENTS 164 Linear or curvilinear arrangement