Cornelia de Lange Syndrome (CdLS) is a rare multisystem disorder characterized by craniofacial dysmorphism, growth restriction, limb anomalies, intellectual disability, and mild to moderate immune abnormalities. We present the case of a newborn female with CdLS who was found to have severe transient T-cell lymphopenia following abnormal newborn T-cell receptor excision circle (TREC) screening. She was treated with immunoglobulin replacement and antimicrobial prophylaxis. She experienced normalization of T cells and no severe infections over a two-year period. To our knowledge, this is the first detailed report of a case of CdLS presenting with profound T-cell lymphopenia identified by newborn screening, underscoring the utility of TREC screening in syndromic infants and the need for further study of immune defects in CdLS.
Retif et al. (Tue,) studied this question.