Note | patients show a remarkably constant clinical phenotype probably due to high cellular mortality induced by the aneuploidies; similar clinical findings have also been found in other patients with an expected increased cellular mortality (variegated aneuploidy without PCD and the "ring syndrome") |
Phenotype and clinics | the clinical phenotype of the 11 patients described in the literature includes microcephaly (11/11), central nervous system (CNS) anomalies (5/6) with cerebellar defects and migration defects, mental retardation (8/9), prenatal (always noted over 23 weeks of gestation) and postnatal growth retardation (10/10), flat and broad nasal bridge (4/7), apparently low-set ears (5/8), eye abnormalities (8/10), skin abnormalities (3/9) and ambiguous genitalia in male patients (4/6); seizures have been reported in 5 patients; cancer is a major concern in the clinical management of these patients (5/11); birth weight corrected for gestational age ranges from -1.3 to -4.1 SD, birth length from -0.8 to -5.4 SD and OFC from -2.6 to -5.8 |
Neoplastic risk | the occurrence of Wilms tumor in three patients, rhabdomyosarcoma in two others and acute leukemia in a fifth characterizes this condition as a chromosome instability disorder with a high risk of malignancy; interestingly enough, preferential loss of maternal 11p15.5 chromosome region has been repeatedly reported in Wilms tumor as well as in rhabdomyosarcoma |
Prognosis | although published data is incomplete, at least 4 patients have died before 2 years of age, a fifth deceased at 42 years and one patient aged 18 month has an advanced, relapsed rhabdomyosarcoma; patient's death had been related to pneumonia (one patient), leukemia (one patient), and Wilms tumor (three cases) |
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