Genetic and phenotypic continuum of HOXA genes: A case with double HOXA9/HOXA13 mutations

The HOXA genes cluster plays a key role in embryologic development. Mutations in HOXA genes have been linked to different human phenotypes, including developmental delay, limb anomalies, and urogenital malformations. The present study reported a clinical and genetic investigation of a female patient with polymalformative syndrome including left arm agenesis, bicornuate uterus and bicuspid aortic valve. Using whole exome sequencing, two heterozygous missense variants were identified. Of these, one was a novel variant in the HOXA13 gene [p.(Tyr290Ser)] and the second a heterozygous variant in the HOXA9 gene [p.(Ala102Pro)]. To the best of our knowledge, this is the first association of HOXA9/HOXA13 point mutations linked to a syndromic case. In conclusion, the present study suggested that the phenotypic spectrum of vertebral anomalies, anal atresia, cardiac defects, tracheo‑esophageal fistula, renal anomalies and limb abnormalities/hand‑foot‑genital syndrome may be attributable to the combination of different HOXA variants, particularly in patients with a severe clinical presentation. The current report contributed as well to the molecular understanding of HOXA genes‑related phenotypes via the identification of novel variant and genes associations.

Pyrimidine 5'-nucleotidase deficiency associated to a polymalformative syndrome

A pyrimidine 5'-nucleotidase deficiency in an adult is reported. Interestingly, the P5'N-1 deficiency was associated to a polymalformative syndrome and was characterized by a chronic, pancytopenic evolution with concomitant dyserythropoiesis.

[Holoprosencephaly alobar amid polymalformative syndrome: contribution of imaging in a case report]

L'holoprosencéphalie est une malformation cérébrale rare, d’étiologies multiples et souvent associée à des anomalies faciales évocatrices. Cette pathologie, résultant d'un défaut de développement précoce du prosencéphale, est de pronostic fœtal extrêmement réservé en particulier pour la forme alobaire. Nous rapportons à travers ce cas clinique, une holoproséncéphalie alobaire diagnostiquée à l'imagerie (ETF, tomodensitométrie) et relevée par un syndrome polymalformatif chez un nouveau-né de 03 mois.