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Fetal anomalies v1.35 PLCH1 Zornitza Stark Phenotypes for gene: PLCH1 were changed from Holoprosencephaly spectrum; Severe developmental delay; Brain malformations to Holoprosencephaly 14, MIM# 619895
Fetal anomalies v1.34 PLCH1 Zornitza Stark reviewed gene: PLCH1: Rating: AMBER; Mode of pathogenicity: None; Publications: ; Phenotypes: Holoprosencephaly 14, MIM# 619895; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Fetal anomalies v0.3183 PLCH1 Zornitza Stark Marked gene: PLCH1 as ready
Fetal anomalies v0.3183 PLCH1 Zornitza Stark Gene: plch1 has been classified as Amber List (Moderate Evidence).
Fetal anomalies v0.3183 PLCH1 Zornitza Stark Classified gene: PLCH1 as Amber List (moderate evidence)
Fetal anomalies v0.3183 PLCH1 Zornitza Stark Gene: plch1 has been classified as Amber List (Moderate Evidence).
Fetal anomalies v0.3151 PLCH1 Krithika Murali gene: PLCH1 was added
gene: PLCH1 was added to Fetal anomalies. Sources: Literature
Mode of inheritance for gene: PLCH1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: PLCH1 were set to 33820834
Phenotypes for gene: PLCH1 were set to Holoprosencephaly spectrum; Severe developmental delay; Brain malformations
Review for gene: PLCH1 was set to AMBER
Added comment: No new published evidence since last PanelApp review April 2021

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PMID: 33820834 (2021) - Two sibling pairs from two unrelated families with a holoprosencephaly spectrum phenotype and different homozygous PLCH1 variants (c.2065C>T, p.Arg689* and c.4235delA, p.Cys1079ValfsTer16, respectively). One family presented with congenital hydrocephalus, epilepsy, significant developmental delay and a monoventricle or fused thalami; while sibs from the second family had alobar holoprosencephaly and cyclopia. 3/4 individuals also displayed a cleft palate and congenital heart disease. Human embryo immunohistochemistry showed PLCH1 to be expressed in the notorcord, developing spinal cord (in a ventral to dorsal gradient), dorsal root ganglia, cerebellum and dermatomyosome.
Sources: Literature