Neurofibromatosis type 2 in Phelan-McDermid syndrome: Institutional experience and review of the literature.

Neurofibromatosis type 2 in Phelan-McDermid syndrome: Institutional experience and review of the literature. Eur J Med Genet. 2020 Aug 18;:104042 Authors: Ziats CA, Jain L, McLarney B, Vandenboom E, DuPont BR, Rogers C, Sarasua S, Nevado J, Cordisco EL, Phelan K, Boccuto L Abstract Phelan-McDermid syndrome (PMS) is a rare neurodevelopmental disorder caused by rearrangements on chromosome 22q13.3 or sequence variants in SHANK3. Individuals with PMS caused by a 22q terminal deletion and a ring chromosome are at increased risk for Neurofibromatosis type 2 (NF2). However, the prevalence of NF2 in individuals with PMS and a r (22) is unknown. Individuals with PMS and a r (22) chromosome evaluated at the Greenwood Genetic Center (GGC) or by international collaborators, or identified through the PMS International Registry (PMSIR) were contacted and participated in a clinical questionnaire. Forty-four families completed the questionnaire and consented for the study. Of the individuals with a r (22), 7 (16%) carried a diagnosis of NF2. The average age of diagnosis of r (22) was 18 years old in individuals with NF2 and three years old in individuals without NF2 (p-value <0.001). Clinical findings were similar among all individuals in our sample with the exception of hearing loss, present in 57% of individuals with NF2 and 8% of individuals without NF2 (p-value <0.01). This is the largest clinical report of individuals with PMS and a r (2...
Source: European Journal of Medical Genetics - Category: Genetics & Stem Cells Authors: Tags: Eur J Med Genet Source Type: research