TURKISH JOURNAL OF PEDIATRICS, vol.64, no.1, pp.171-178, 2022 (SCI-Expanded)
Background. Tetrasomy 9p is a rare genetic condition which usually results from a supernumerary isochromosome derived from the short arm of chromosome 9. Phenotypic findings include multiple congenital anomalies, facial dysmorphism, growth and developmental delays, and also vary according to the presence and degree of mosaicism.