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  • Title: Severe multisystemic hypersensitivity reaction to carbamazepine including dyserythropoietic anemia.
    Author: Lombardi SM, Girelli DG, Corrocher R.
    Journal: Ann Pharmacother; 1999 May; 33(5):571-5. PubMed ID: 10369620.
    Abstract:
    OBJECTIVE: To report a case of multisystemic hypersensitivity reaction to carbamazepine. CASE SUMMARY: An 81-year-old white man was admitted to our hospital because of fever, morbilliform pruritic rash, and jaundice. Fifty days before admission he had taken carbamazepine 200 mg p.o. tid because of seizures. During the first few days following admission, a maculopapular rash progressed to generalized erythroderma with subsequent extensive skin exfoliation. After discontinuing carbamazepine the fever disappeared within 72 hours and hepatic function tests returned to normal within four days. Moreover, after admission the hemoglobin values gradually fell to 6.7 g/100 mL. A bone marrow aspirate showed hypercellularity with marked dyserythropoietic abnormalities, and the bone marrow biopsy showed large and diffused infiltration due to the presence of a low-grade small lymphocytic lymphoma. No specific therapy for the lymphoma was undertaken. The biochemical follow-up showed a total improvement of hemoglobin values. Eight months after drug discontinuation, the patient was asymptomatic; peripheral blood cell count and hemoglobin concentrations were persistently normal. DISCUSSION: To the best of our knowledge, this is the first published case report implicating carbamazepine as the cause of anemia associated with bone marrow hypercellularity and dyserythropoietic changes, instead of hypocellularity and reduction of erythroid precursors. An interesting point raised by our observation is the possible relation between carbamazepine intake and actual lymphoproliferative disease. The development of non-Hodgkin's lymphoma following carbamazepine treatment has been reported, with regression after the drug was discontinued. However, in our case, a bone marrow biopsy repeated eight months after drug discontinuation confirmed the diagnosis of low-grade lymphoma. CONCLUSIONS: This case report describes a severe multisystemic reaction, characterized by generalized erythroderma; and renal, hepatic, and bone marrow failure in a patient who started carbamazepine therapy 50 days beforehand.
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