Specification of small distal 6q deletions in two patients by gene dosage and in situ hybridization study of plasminogen and alpha-L-fucosidase 2

American Journal of Medical Genetics
K NaraharaK Wakui


Gene-dosage and in situ hybridization study of plasminogen (PLG) and alpha-L-fucosidase 2 (FUCA2) was performed on two patients with a small deletion of the distal long arm of chromosome 6, to define the structural abnormality more precisely. The results led to the cytogenetic diagnosis of an interstitial 6q deletion, del(6)(q25.1q25.3), in one patient and of a terminal 6q deletion resulting from a paternal t(1;6)(q44;q2605) translocation in the other patient. The latter patient had congenital noncommunicating hydrocephalus due to obstruction at the level of the foramen of Monro or the third ventricle which has not previously been described in terminal 6q deletions. Review of the literature suggests the emergence of a clinical syndrome associated with terminal 6q deletions.


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