Ring chromosome 9 in a newborn.

Ring chromosome 9 in a newborn: Ring chromosome 9 is a rare genetic disorder observed in the children with variable clinical presentation and phenotype. Among several ring formation, individuals with r(9) generally have less distinct clinical features. We examined in a newborn patient with trigonocephaly, upward-slanting palpebral fissures, small face, micrognathia, high arched palate, low set ears, hypertrichosis and broad eyebrows, short neck and we diagnosed this patient as ring chromosome 9 by chromosomal analysis. We compared the clinical findings of our cases with previously reported patients in the literature.