Differential Diagnosis in Dermatopathology

Discussions

…locytes are gone. Short-lived urticaria often is explosive in onset and almost always is allergic in cause. If the patient does not identify the cause (e.g., an ingestant, inhalant, or injected substance), it is unlikely that it ever will be discover…

Histologic Diagnosis of Inflammatory Skin Diseases

Gas gangrene

…al myonecrosis Presentation stereotypical Age and sex Usually adults of both sexes Distribution of lesions Localized to sites of deep wounds Individual lesions Dusky erythematous plaques and hemorrhagic bullae through which bubbles of gas percolate,…

Differential Diagnosis in Dermatopathology

Discussions

…oma is a solitary excrescence that arises from the skin of an adult near an interphalangeal joint of a finger. The projection may be elongated (polypoid) or domed (sessile), but always is keratotic. Other fibromas that have attributes histopathologic…

Differential Diagnosis in Dermatopathology

Discussions

…attributes histopathologic of xanthogranulomas (childhood and adult) and the for reticulohistiocytic granuloma, a student could conclude that the two “granulomas” were separate and distinct from one another. On closer inspection and on re…

Histologic Diagnosis of Inflammatory Skin Diseases

Lichen striatus

…ypical Age and sex Mostly girls, but sometimes boys and young adults of both sexes Distribution of lesions Usually an extremity Arrangement of lesions Linear Individual lesions Papules, some of which may be scaly, that coalesce to form plaques Variat…

Differential Diagnosis in Dermatopathology

Discussions

…h sometimes is referred to imprecisely as the drug-induced or adult form of toxic epidermal necrolysis) because those two conditions have so many features in common. Both diseases are typified clinically by widespread reddish lesions, involvement of…