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A male infant was born by emergent caesarean section at 39 weeks gestational age secondary to maternal and fetal distress. Initial physical examination was notable for macrocephaly (greater than+2SD), postaxial polydactyly of the hands and facial dysmorphism. Head imaging demonstrated diffuse polymicrogyria without hydrocephalus. All findings were consistent with a diagnosis of megalencephaly, polymicrogyria, postaxial polydactyly and hydrocephalus (MPPH) syndrome. At the 4-year follow-up, megalencephaly persisted without evidence of hydrocephalus. The child was severely delayed with a stable seizure disorder controlled with dual antiepileptic therapy. This case meets the classic criteria for MPPH syndrome, adding to the limited experience with this disease. The 4-year follow-up and absence of hydrocephalus, once thought to be a key diagnostic criterion, adds to our understanding of the long-term sequelae.
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http://dx.doi.org/10.1136/bcr-2012-007826 | DOI Listing |
Mol Genet Genomic Med
September 2025
Genomic Health, West Leederville, Western Australia, Australia.
Background: Culler-Jones syndrome (CJS) is an autosomal dominant disorder characterized by hypopituitarism, postaxial polydactyly, and craniofacial anomalies, associated with pathogenic GLI2 variants. Genotype-phenotype correlations suggest missense variants may present with isolated pituitary phenotypes.
Methods: We evaluated an 8-year-old boy referred for short stature, failure to thrive, and neurodevelopmental concerns.
HGG Adv
August 2025
Pediatrics and Rare Diseases Group, Sanford Research, Sioux Falls, SD 57104, USA; Sanford School of Medicine, University of South Dakota, Sioux Falls, SD 57105, USA. Electronic address:
The increasing availability and affordability of genetic testing has resulted in the identification of numerous novel variants associated with neurodevelopmental disorders. There remains a need for methods to analyze the functional impact of these variants. Some methods, like expressing these variants in cell culture, may be rapid, but they lack physiologic context.
View Article and Find Full Text PDFAm J Med Genet A
August 2025
Department of Pediatrics, University of California, San Diego, California, USA.
We report on two patients with four-limb postaxial polydactyly and a recurrent de novo missense variant (c.179G>A) in the MAX gene. This variant has been previously reported in four other cases of polydactyly, progressive macrocephaly, and ophthalmologic abnormalities.
View Article and Find Full Text PDFMol Syndromol
December 2024
Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University Islamabad, Islamabad, Pakistan.
Background: Polydactyly is one of the most common hereditary limb malformations, characterized by presence of additional digits in hands and/or feet. It is present either in isolated form or in combination with other features. Preaxial polydactyly with extra digit on the outside of the thumb or big toe, and postaxial polydactyly with extra digit on the outside of the little finger or little toe are the two main forms of polydactyly.
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