Mutations in this gene result in autosomal recessive severe congenital neutropenia.
G6PC3 deficiency results in a phenotypic continuum. At one end the affected individuals have only neutropenia and related complications but no other organ is affected. This is sometimes referred to as non-syndromic or isolated severe congenital neutropenia. Most affected individuals have a classic form of the disease with severe congenital neutropenia and cardiovascular and/or urogenital abnormalities. Some individuals have severe G6PC3 deficiency (also known as Dursun syndrome) and they have all the features of classic G6PC3 deficiency but in addition show involvement of non-myeloid hematopoietic cell lines, some other extra-hematologic features and pulmonary hypertension.
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^Banka S, Newman WG, Ozgül RK, Dursun A (October 2010). "Mutations in the G6PC3 gene cause Dursun syndrome". American Journal of Medical Genetics. Part A. 152A (10): 2609–11. doi:10.1002/ajmg.a.33615. PMID20799326.