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Blood, 15 May 2007, Vol. 109, No. 10, pp. 4539-4547.
Prepublished online as a Blood First Edition Paper on February 6, 2007; DOI 10.1182/blood-2006-10-048652.
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Submitted October 4, 2006
Accepted January 21, 2007
Review of 54 patients with complete DiGeorge anomaly enrolled in protocols for thymus transplantation: outcome of 44 consecutive transplants
M. Louise Markert*, Blythe H. Devlin, Marilyn J. Alexieff, Jie Li, Elizabeth A. McCarthy, Stephanie E. Gupton, Ivan K. Chinn, Laura P. Hale, Thomas B. Kepler, Min He, Marcella Sarzotti, Michael A. Skinner, Henry E. Rice, and Jeffrey C. Hoehner
Human Vaccine Institute, Duke University Medical Center, Durham, NC
Department of Pediatrics, Duke University Medical Center, Durham, NC
Department of Pathology, Duke University Medical Center, Durham, NC
Center for Computational Immunology, & Department of Biostatistics & Bioinformatics, Duke University Medical Center, Durham, NC
Department of Immunology, Duke University Medical Center, Durham, NC
Department of Surgery, Duke University Medical Center, Durham, NC
* Corresponding author; email: marke001{at}mc.duke.edu.
The purpose of this study was to characterize a large group of infants with complete DiGeorge anomaly and to evaluate the ability of thymus transplantation to reconstitute immune function in these infants. DiGeorge anomaly is characterized by varying defects of the heart, thymus, and parathyroid glands. Complete DiGeorge anomaly refers to the subgroup that is athymic (<1%). The characteristics of 54 subjects at presentation and results from 44 consecutive thymus transplants are reported. Remarkably, only 52% had 22q11 hemizygosity and only 57% had congenital heart disease requiring surgery. Thirty one percent developed an atypical phenotype with rash and lymphadenopathy. To date, 33 of 44 transplanted subjects survive (75%) with post transplantation follow up as long as 13 years. All deaths occurred within 12 months of transplantation. All 25 subjects who were tested one year post-transplantation had developed polyclonal T cell repertoires and proliferative responses to mitogens. Adverse events developing post-transplantation included hypothyroidism in five subjects and enteritis in one subject. In summary, diagnosis of complete DiGeorge anomaly is challenging because of the variability of presentation. Thymus transplantation was well tolerated and resulted in stable immunoreconstitution in these infants.

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