RESUMO
Acute phase reactants (APRs) are a heterogeneous group of plasma proteins whose concentration either increases or decreases by at least 25% during an inflammatory process. The conditions that commonly lead to acute phase response are infection, trauma, burns, tissue infarction, inflammatory conditions, and advanced malignancy. APRs are elevated in all infective conditions. In skin and soft tissue infection, the levels of erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) help to predict the severity of infection. Procalcitonin can be used to differentiate between viral and bacterial infections. During active stages of systemic lupus erythematosus (SLE), ESR is elevated, but CRP either remains normal or shows only moderate elevation. In the case of superadded bacterial infection in SLE, CRP is elevated. In SLE, ferritin levels are elevated during the active stage of the disease. Serum amyloid antigen (SAA) and CRP levels are significantly higher in patients with early and late stages of diffuse systemic sclerosis. Elevated levels of serum ferritin are seen in rheumatoid arthritis and adult-onset Still's disease. CRP, SAA, and α2-macroglobulin (α 2M) are elevated in active psoriasis. In severe psoriasis, the ferritin-iron ratio is elevated. In drug-induced maculopapular rash, drug-induced hyperaemic vasculitis, and severe drug-induced cutaneous adverse reactions, CRP levels are elevated during the active stages. Neoplastic diseases in general are accompanied by increased serum ferritin. Further detailed studies are required to explore the clinical significance of APRs in dermatology and the scope of their possible application as a diagnostic tool.
RESUMO
CONTEXT: Drug reaction with eosinphilia and systemic symptoms (DRESS) and drug-induced hypersensitivity syndrome (DiHS) represent the same spectrum of a drug reaction. AIMS: To compare the clinical profile of patients diagnosed as definite/probable DRESS by the Registry of Severe Cutaneous Adverse Reaction (RegiSCAR) scoring system and as atypical DiHS by Japanese consensus group criteria. SETTINGS AND DESIGN: We did a retrospective study in a tertiary referral center. MATERIALS AND METHODS: We included patients who satisfied the criteria for definite/probable DRESS and/or atypical DiHS and who received inpatient care in our department from January 2011 to December 2018. We compared the clinical and laboratory findings in patients diagnosed by the two criteria. STATISTICAL ANALYSIS: Pearson Chi-square test was used to compare the proportion of patients with severe reactions diagnosed by the RegiSCAR DRESS validation scoring system and the Japanese consensus group criteria. RESULTS: Among the 390 case records reviewed, 138 patients could be classified as definite/probable DRESS and/or atypical DiHS. Japanese criteria did not diagnose atypical DiHS in 88/137 (64.2%) patients with definite/probable DRESS. RegiSCAR scoring system made a diagnosis of definite/probable DRESS in 49/50 (98%) patients with atypical DiHS. A total of 58/138 (42%) patients had a severe reaction. RegiSCAR scoring system diagnosed 57/58 (98.3%) patients with severe reaction as definite/probable DRESS. A total of 32/58 (55.2%) patients with severe reactions were diagnosed as atypical DiHS. The difference was statistically significant (<0.001). CONCLUSION: Japanese criteria for atypical DiHS showed reduced sensitivity to diagnose definite/probable DRESS, and this included more than 40% of patients with severe DRESS.
