2 Diagnostic Clues and “Need-to-know” Items
Painful subcutaneous nodules 13
Drug-induced subacute cutaneous LE 13
Elastosis perforans serpignosum associated disorders and causes 14
Markers to differentiate 14
Red groin common etiologies 14
Nevus sebaceous growth risk 14
Multiple facial tumors 15
Acute attack porphyrias 15
Porphyria acute attack triggers 15
Disorders with an infiltrate filling the papillary dermis 15
Mounds of parakeratosis differential 15
Subepidermal blister with neutrophils 15
Subepidermal blister, cell-poor 15
Malignant spindle cell tumors 16
Superficial and deep dermal lymphocytic infiltrate causes 16
Septal panniculitis differential 16
Associations with erythema nodosum 16
Pale epidermis differential 16
Multiple umbilicated “molluscum contagiosum-like” lesion differential 17
Papillomatosis differential 17
Deep nodule differential 17
Intracellular parasites on H & E 17
Teeth and jaw abnormalities 17
Wiskott-Aldrich syndrome 17
Marked papillary dermal edema 17
Superficial perivascular lymphocytic infiltrate with no epidermal involvement 17
Disorders with bone and calcification presentation clues 18
X-linked dominant syndromes 18
Causes of leukocytoclastic vasculitis 18
Collodion baby differential 18
X-linked recessive syndromes 18
Conditions often associated with a monoclonal gammopathy 19
Drugs often associated with acral erythema 19
Neutrophilic dermatosis 19
Fluorescent-positive ectothrix fungal infections 19
Polarizable conditions 19
Grenz zone differential 19
“Good-to-know” clinical and dermatopathology clues 20
Dermatofibrosarcoma protuberans 21
Acquired digital fibrokeratoma 21
Pityriasis rubra pilaris 22
Actinic (solar) keratosis 24
Fibroepithelioma of Pinkus 24
Epidermolytic hyperkeratotic acanthoma 26
Electrodesiccation artifact 27
Invisible dermatoses differential 27
Spindle cell tumor differential 28
Dermoscopy classic images 29
Congenital melanocytic nevus 29
Benign melanocytic nevi 29
Nail abnormalities overview 31
Color change of nail 33
Azure (or blue) lunulae 34
Red and white longitudinal lines with V-shaped indentation on distal margin 34
Spindle cell tumor differential
SLAM DUNK
Nail abnormalities overview
