The following genetic variant occurs in LOC129936407, STT3B (ATAC-STARR-seq lymphoblastoid silent region 14161| STT3 oligosaccharyltransferase complex catalytic subunit B) on Chromosome 3. Classify its clinical effect — pathogenic or benign — and list any associated condition.
Pathogenic; STT3B-congenital disorder of glycosylation