Morbilliform skin eruptions
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Morbilliform Skin Eruptions: Causes, Manifestations, and Management
Introduction to Morbilliform Skin Eruptions
Morbilliform skin eruptions, characterized by widespread erythematous maculopapular rashes, are a common dermatologic condition often triggered by various factors including medications, infections, and systemic diseases. These eruptions can present with varying degrees of severity and are frequently associated with pruritus and discomfort.
Drug-Induced Morbilliform Eruptions
Diethylstilbestrol and Prostatic Cancer
One notable cause of morbilliform eruptions is the administration of diethylstilbestrol in patients with prostatic cancer. In such cases, the rash typically resolves upon withdrawal of the drug, indicating a direct correlation between the medication and the skin reaction .
Antibiotics and Penicillin
Antibiotics, particularly penicillin, are another common cause of morbilliform eruptions. These reactions usually occur several days to weeks after the initiation of therapy. Histological examinations reveal intercellular edema and other changes similar to those seen in pemphigus vulgaris, although no specific antibodies or delayed sensitivity to penicillin derivatives are typically detected . The prevalence of these eruptions varies with different classes of antibiotics, making it essential for clinicians to consider recent antibiotic use when diagnosing skin rashes .
Telaprevir and Hepatitis C Treatment
Telaprevir, used in combination with pegylated interferon alfa and ribavirin for hepatitis C treatment, is also associated with severe morbilliform eruptions. Dermatologic consultation and the use of antihistamines, topical corticosteroids, and emollient creams can help manage these reactions, allowing patients to continue their treatment regimen .
COVID-19 Vaccines
Recent reports have also documented morbilliform eruptions following COVID-19 vaccination, particularly with the Oxford/AstraZeneca vaccine. These eruptions typically appear within hours of vaccination and respond well to corticosteroids and antihistamines .
Infections and Morbilliform Eruptions
COVID-19
COVID-19 has been associated with various cutaneous manifestations, including morbilliform eruptions. Histological studies of these eruptions in COVID-19 patients show mild, non-specific features with no detectable viral RNA, suggesting that these rashes may be paraviral rather than directly caused by the virus Fattori2020Caputo2021.
Graft-Versus-Host Disease (GVHD)
In the context of solid organ transplantation, graft-versus-host disease (GVHD) can present with morbilliform eruptions. These rashes typically appear within weeks of transplantation and are associated with high mortality rates due to complications such as sepsis and multiorgan failure .
Systemic Diseases and Morbilliform Eruptions
Non-Hodgkin's Lymphoma
Morbilliform eruptions can also be an initial or later manifestation of systemic diseases such as non-Hodgkin's lymphoma. These eruptions are characterized by a perivascular infiltrate of atypical lymphoid cells, highlighting the need for thorough evaluation in patients with unexplained skin rashes .
Conclusion
Morbilliform skin eruptions are a multifaceted dermatologic condition with various etiologies including medications, infections, and systemic diseases. Accurate diagnosis and management require a comprehensive understanding of the potential causes and appropriate therapeutic interventions. Clinicians should maintain a high index of suspicion for drug-induced and infection-related eruptions, particularly in patients with recent medication changes or systemic symptoms.
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