Histologic Diagnosis of Inflammatory Skin Diseases

Scleromyxedema

Scleromyxedema Synonyms Papular mucinosis Lichen myxedematosus Presentation stereotypical Age and sex Adults of either sex Distribution of lesions Widespread Individual lesions Papules that produce diffuse thickening of the skin Course Protracted Va…

Differential Diagnosis in Dermatopathology

Lichen planus vs. Lichenoid discoid lupus erythematosus

An inflammatory disease of children and adults that tends to involve skin and skeletal muscle mostly, the findings in the skin being patches with the color of heliotrope, especially in the periocular region. The disease manifests itself as poikilode…

Differential Diagnosis in Dermatopathology

Study By Disease

“Blue nevus” (Jadassohn-Tièche) (Quiz #360) “Blue nevus” (Jadassohn-Tièche) (Quiz #525) “Blue nevus” (Masson’s blue neuronevus) (Quiz #359) “Collagenous” nevus, papillary dermal type* (Quiz #11…

Differential Diagnosis in Dermatopathology

Lupus profundus vs. Morphea profundus

An inflammatory disease of children and adults that tends to involve skin and skeletal muscle mostly, the findings in the skin being patches with the color of heliotrope, especially in the periocular region. The disease manifests itself as poikilode…

Differential Diagnosis in Dermatopathology

Images

Discoid lupus erythematosus Dermatomyositis

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema figuratum

Erythema figuratum Synonyms Erythema figuratum perstans Figurate erythema Annular erythema Presentation stereotypical Age and sex Adults of both sexes, but women especially Distribution of lesions Localized or widespread, trunk and proximal extremit…

Differential Diagnosis in Dermatopathology

Discussions

The panniculitis of lupus erythematosus, known conventionally as lupus profundus, and the panniculitis of morphea, referred sometimes to as morphea profundus, have several findings histopathologic in common: infiltrates of lymphocytes and plasma cel…

Differential Diagnosis in Dermatopathology

Discussions

Lichen planus and lichenoid discoid lupus erythematosus have many findings histopathologic in common, among them hyperkeratosis of surface epidermis and plugs of cornified cells in infundibular epidermis; individual necrotic keratocytes; a lichenoid…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Discoid lupus erythematosus Dermatomyositis 1. Infundibula dilated commonly by plugs of cornified cells 1. Infundibula not plugged by cornified cells 2. Follicles atrophy and disappear consequent to the effects of products of lymphocytes 2. Fo…