LAUSR

Partial trisomy 13 is a rare syndrome that usually culminates in death within the first six months of the infant's life. We present a rare case of partial trisomy 13q with exclusive clinical manifestations. The full-term male baby was born by normal vaginal delivery, his birth weight was 3500 grams, and head circumference was 30 cm. He had dysmorphic features in the form of microcephaly, trigonocephaly, depressed nose bridge, hypotelorism, long philtrum, high arch palate, left-sided inguinal hernia, hydrocele, and laryngomalacia. He was operated for pyloric stenosis at the age of 28 days. He also had left-sided severe pelvic-ureteral junction stenosis which was repaired by nephrostomy followed by pyeloplasty. Furthermore, he had right-sided vesicoureteral reflux grade III, right-sided hydronephrosis, small ventricular septum defect, small atrial septum defect, left lung lower lobe sequestration, and craniosynostosis of metopic suture. The baby had global developmental delay and failure to thrive. Cytogenetic study showed a 46,XY, der(8)t(8;13)(p23;q14) karyotype, emphasizing a partial trisomy 13q syndrome with a concomitant partial monosomy in 8p. The baby passed away, in the intensive care unit, at the age of 7 months due to respiratory failure resulting from recurrent chest infections. This is the first reported case of a partial trisomy 13q associated with chromosome 8 with unique clinical presentations. Cytogenetic study for both parents is recommended in order to pinpoint the origin of the translocation and to provide the proper counseling for the family.