Warkany syndrome 2 or trisomy 8 mosaicism is a well-described, but very rare, chromosomal abnormality. The phenotype is extremely variable ranging from normal to a severe malformation syndrome. Because of the broad spectrum of clinical findings, this condition is often underdiagnosed. Trisomy 8 mosaicism can affect several organs causing intracranial, genitourinary and skeletal system anomalies, congenital cardiovascular disorders, deep palmar and plantar creases, and neoplastic and hematological disorders. Here, we report trisomy
8 mosaicism in a 3-year-old boy evaluated for facial dysmorphism and delayed development.
Keywords: trisomy 8 mosaicism, warkany syndrome 2, facial dysmorphism, delayed development