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Anaphylactic reaction to intravenous corticosteroids in the treatment of ocular toxoplasmosis: a case report
© Fieß et al.; licensee BioMed Central Ltd. 2014
Received: 31 July 2013
Accepted: 17 January 2014
Published: 2 April 2014
This case report presents for the first time an acute systemic allergic reaction to corticosteroids in a patient with ocular toxoplasmosis after treatment with intravenous cortisone, and discusses alternative treatments.
We present the case of a 57-year-old Caucasian woman with an anaphylactic reaction after intravenous injection of prednisolone-21-hydrogensuccinate (Solu-Decortin® H) given for the treatment of toxoplasmosis-associated chorioretinitis. Immediately after the injection, she developed an acute erythema of the legs and abdomen, angioedema, hypotension (blood pressure 80/40mmHg), tachycardia (heart rate 140/minute), hyperthermia (38.8°C), and respiratory distress. Allergological examinations showed a positive skin-prick test to prednisolone and methylprednisolone. In addition, an oral exposure test with dexamethasone (Fortecortin®) and betamethasone (Celestamine®) was conducted to find alternative corticosteroids for future treatments. After oral application, no local or systemic reactions were observed for these two substances.
This case report demonstrates that systemic allergic reactions are possible in patients with uveitis or other inflammatory ophthalmological conditions treated with intravenous corticosteroids. Intravenous administration of cortisone, for example, in the treatment of ocular toxoplasmosis, should always be conducted with caution because of a possible allergic reaction. For patients who react to a particular steroid, it is necessary to undergo allergological testing to confirm that the compound in question is indeed allergenic, and to identify other corticosteroids that are safe for future anti-inflammatory treatments.
Glucocorticoids are among the most effective and longest known pharmaceuticals for the suppression of immunological reactions. Since their initial therapeutic use in medicine in 1948 , they have been used for their anti-inflammatory effect in a variety of indications. There are also a lot of indications in ophthalmology, for example, treatment of uveitis or ocular toxoplasmosis (OT). However, since their first use, many intolerance reactions have been described. These were mainly reported for local , intramuscular , oral , and inhalation  applications. Only a few cases report an anaphylactic reaction after intravenous administration of cortisone [6, 7]. Therefore, we report for the first time the case of a systemic allergic reaction by a patient with OT treated with a single dose of intravenous prednisolone-21-hydrogensuccinate (Solu-Decortin® H) to reduce the ocular inflammatory response of OT.
Skin-prick test 24 hours
0.9% Sodium chloride
In addition, an oral exposure test with a step-by-step elevation of doses up to 2.0mg of dexamethasone (Fortecortin®) and 1.5mg betamethasone (Celestamine®) was conducted to find alternative corticosteroids for future treatments. For both substances, no local or systemic side effects were observed.
After 1 month of treatment with clindamycin (Clindamycin® H) monotherapy without any increase in visual acuity, the patient underwent a vitrectomy with balanced salt solution filling because of heavy vitreous opacities, and to obtain a sample of the vitreous body. The polymerase chain reaction (PCR) on the sample was positive for Toxoplasma gondii.
The first unquestionable anaphylactic reaction to intravenous corticosteroids was described in the year 1974 after treatment of a patient with methylprednisolone and hydrocortisone during an acute asthma attack . The medical literature describes only approximately 40 cases of allergic reactions after systemic administration of cortisone [8, 9]. Moreover, this is the first reported case of an acute allergic reaction to intravenous prednisolone in a patient with OT. Accordingly, this case demonstrates that the use of intravenous cortisone requires caution because of a possible allergic reaction, albeit very rare. In the case of a severe systemic reaction to intravenous corticosteroids, we advise allergological testing of the most frequently administered corticosteroids and of all other components of the administered formulation. This is, on the one hand, to find the compound responsible for the allergic reaction and, on the other hand, to identify corticosteroids for future treatment.
A few publications report a dramatic clinical course with subsequent death of the patient after intravenous administration of corticosteroids. However, in these cases the correlation between intravenous corticosteroids and subsequent death was hypothesized only due to the chronological connection [10, 11]. Our patient showed the typical signs of anaphylaxis as described in a few publications and recovered completely after 2 days . However, the hyperthermia of the patient after the cortisone administration is not a typical feature of anaphylaxis. Nevertheless, since there was no concurrent infection other than OT, it was concluded that hyperthermia was part of the anaphylactic reaction in this case, although it is not commonly so.
In the literature, there is epidemiological data about the incidence of corticosteroid allergies. In a routine epicutaneous test in 2073 patients there was a positive test result in 61 patients (2.9%) . In a study by Alexiou et al., in three of 300 patients an anaphylactic reaction to prednisolone-21-hydrogensuccinate (Solu-Decortin® H) occurred during a 3-day therapy with intravenous cortisone up to 1000mg per day. This would correspond to a frequency of 1%. In contrast to this study, the number of case reports in the medical literature is very low [8, 9].
To confirm the suspected allergy to corticosteroids in the present case, a skin-prick test and an epicutaneous test were carried out. The skin-prick test was performed by puncturing the skin of the patient’s lower arm with a lancet in an area where a drop of the possible allergenic solution had been applied. Immediately after puncturing the antigen solution was wiped off and following 5 to 15 minutes and 24 hours, the skin reaction was evaluated. A positive reaction was noted if there was a wheal at the puncture. There was a positive control (histamine application) and a negative control (0.9% sodium chloride application). In the present case, the skin-prick test was positive in the form of a 5mm wheal for prednisolone and methylprednisolone after 24 hours. Due to the fact that the skin-prick test was positive for pure preparations of corticosteroids, there was no need to test for other candidate substances. Solu-Decortin® H is sealed in glass ampules under nitrogen, which can hardly be a cause for an allergy. If there had been additional ingredients such as preservatives, these should have been tested as well. It is important to conduct allergological testing for every suspected substance because every compound administered could indeed be allergenic. Given the positive prick-test an intracutaneous test was waived because of the danger of a possible anaphylactic reaction. The epicutaneous test of our patient was negative for all substances being tested. This could be because an epicutaneous test is a test for Type IV reactions. The epicutaneous test was performed to test if the patient had a possible contact allergy for corticosteroids. However, the anaphylactic reaction in our case was a Type I reaction, which could be confirmed with the skin-prick test that tests Type I reactions. Overall, immunological reactions to systemic corticosteroids are frequently of Type I according to the classification by Gell and Coombs .
Detection of antibodies is often difficult because there are no specific data for the technical analysis of serum samples. Specific serum IgE antibodies to corticosteroids were detected in only a few cases [15–17] and often antibodies could not be found .
The clinical course of OT is usually self-limiting but can recur after years. However, in some cases, OT can lead to loss of vision, optic nerve or macular affection, and vitreous opacities . Previous studies  have shown that pars plana vitrectomy can be performed safely on patients with OT who suffer from vitreoretinal complications. Our findings in this case report are consistent with these results. In the case of our patient, after the vitrectomy, her visual acuity recovered due to the removal of vitreous opacities. Moreover, another benefit is the diagnostic certainty obtained by conducting PCR analysis on a sample of vitreous body when a diagnosis remains inconclusive solely based on clinical symptoms.
The most common therapy for OT is a triple therapy consisting of pyrimethamine, sulfadiazine, and corticosteroids . Steroids are successful in reducing the ocular inflammatory response. To reduce ocular inflammation, the use of intravitreal triamcinolone or dexamethasone is an alternative treatment for patients with OT. A study by Soheilian et al. compared intravitreal injection of clindamycin and dexamethasone with the standard treatment for OT, consisting of systemic pyrimethamine, sulfadiazine, and prednisolone. The authors showed that intravitreal injections of clindamycin and dexamethasone resulted in lower systemic side-effects and greater convenience than systemic OT medications. However, in the case of a proven prednisolone allergy, intravitreal injection of an alternative steroid, for example dexamethasone, would only be feasible if an allergic reaction towards the intravitreal deposit of the drug can definitely be excluded. Due to the possibility of an allergic cross-reaction toward dexamethasone, which would probably reside in the eye for weeks after intravitreal deposition, we strictly avoided such a treatment.
In summary, this case report demonstrates that systemic allergic reactions are possible in patients with uveitis or other inflammatory ophthalmological conditions treated with intravenous corticosteroids. Intravenous administration of cortisone, for example in the treatment of OT, should always be conducted with caution because of a possible allergic reaction. For patients who react to a particular steroid, it is necessary to undergo allergological testing to confirm that the compound in question is indeed allergenic, and to identify other corticosteroids that are safe for future anti-inflammatory treatments.
Written informed consent was obtained from the patient for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
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