“…In this report we describe a fourth case of an infant with trisomy 4 mosaicism. Only three cases have been reported previously in literature to date [Marion et al, ; Wieczorek et al, ; Brady et al, ; Lal and Di, ]. Based on these four patients the common phenotype of trisomy 4 mosaicism seems to include: IUGR (3/3), low birth weight/length/OFC (3/3), congenital heart defects (3/3), characteristic thumb anomalies (3/3), skin abnormalities (3/4) and several facial dysmorphisms (asymmetry of the face, eyebrow anomalies, low‐set ears, posteriorly rotated ears, and micro/retrognathia).…”