ron thibertdo,$ msph$ dup15qcenter ... · mghdup15q$center$! 38– isodicentric15q11q13(...
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Ron Thibert DO, MsPH Dup15q Center
Massachusetts General Hospital
MGH Dup15q Center � Opened in late 2009/early 2010 � Families seen both at Massachusetts General Hospital and the Lurie Center for Autism (children & adults)
� Specialties: � Neurology/epilepsy � Psychiatry � Neuropsychology � Sleep Medicine � GI � Genetics/genetic counseling
� 60 Families seen to date
MGH Dup15q Center � 38 – isodicentric 15q11-‐q13 (idic(15))
� 1 – mosaic: ½ cells normal and ½ with 6X copies � 11 – interstitial duplications of 15q11-‐q13 (int dup(15))
� 1 – interstitial duplication/triplication mosaic � 5 – interstitial duplications of 15q11.2 (int dup(15BP1-‐2))
� 2 – interstitial duplications of 15q13.2-‐q13.3 or q13.3 � 2 – without disease causing duplications
Seizures/EEG Findings � Isodicentric chromosome 15q (idic15) � 36 children (20M, 16F) – avg. age 9.9 yrs (2-‐20 yrs)
� 89% of M with seizures; 60% F with seizures (1st 40) � Age of onset later in F
� 32/36 with ASD � 15/36 (42%) non-‐verbal
� 29/36 (81%) had seizures � 7/29 (24%) had spasms (5M, 2F) � 7 had very refractory epilepsy with multiple seizure types (including spasms) and characteristic EEG patterns (LGS variant)
Seizures/EEG Findings � Isodicentric chromosome 15q (idic15) � EEG – 16 children (13 with seizures, 3 without)
� 8/16 with background slowing (0/3 without seizures) � 8/16 with generalized discharges (0/3 without seizures) � 6/16 with focal discharges (1/3 without seizures) � 16/16 with excessive beta activity � 6 had bursts of very high voltage 12-‐14 Hz polyspikes during sleep, at times with subtle tonic posturing (all had refractory LGS variant epilepsy)
EEG – idic15 12-‐14 Hz ac?vity
EEG – idic15 12-‐14 Hz ac?vity
EEG – idic15 12-‐14 Hz ac?vity
EEG – idic15 fast ac?vity
EEG – idic15 fast ac?vity
Seizures/EEG Findings � Interstitial Duplications � 11 children (8M, 3F) – avg. age 5.2 yrs (4 mo-‐16 yrs) � 9/11 with ASD
� Only 1/11 is non-‐verbal � The 2 without ASD <1 year old (twins of affected sibling)
� 2/11 have seizures (18%) � Both have focal seizures and on monotherapy � None had spasms
Seizures/EEG Findings � Interstitial Duplications � EEG – 7 children (2 with seizures, 5 without)
� Focal spikes in 2/7 (1 with seizures, 1 without) � None with generalized discharges � 3/7 had background slowing � 7/7 had excessive beta activity
EEG – Inters??al Duplica?ons
EEG – Inters??al Duplica?ons
Seizures/EEG Findings � BP1-‐2 Duplications � 3 children (2F, 1M) – avg. age 7.3 years (4-‐11) � 3/3 with ASD (2 mild, 1 more severe) � 1/3 with seizures (most severe with seizures – no spasms)
� EEG (1 EEG – child with no seizures) � Normal, no excessive fast activity
EEG – BP1-‐2
Seizures/EEG Findings � 15q13.3 Duplications � 2 children (2F) – both age 5 � 2/2 with ASD � 1/2 with seizures – focal seizures and no spasms (also severe prematurity)
� EEG (1 EEG – child with seizures) � Occasional left temporal sharp waves, no excessive beta activity
GI Dysfunc?on � 46 individuals
� 41 included (4 excluded due to additional CNV and 1 excluded due to inadequate genetic records)
� Average age 9.3 years (range 1-‐23) � Male – 27, Female – 14 � 26/41 diagnosed with ASD (63.4%)
� Shaaya et al. – in review (AJMG)
GI Dysfunc?on � 33/41 (80.5%) reported GI symptoms
� 18/33 (51%) reported GI reflux � 21/33 (64%) reported constipation � 10/33 (30%) reported both symptoms
� 21/26 (80.8%) with ASD reported GI symptoms � 11/21 (52%) reported GI reflux � 12/21 (57%) reported constipation � 5/21 (23%) reported both symptoms
GI Dysfunc?on � 30 individuals had idic(15)
� 23 (76.7%) had GI symptoms � 8 individuals with int dup(15)
� 7 (87.5%) had GI symptoms � 3 individuals with int dup(15 BP1-‐2)
� 3 (100%) had GI symptoms
GI Dysfunc?on � Treatment
� 81% of those with constipation started on PEG � 72% of those with GI reflux started with a PPI � 24% with symptoms did not begin medication � 2 required botox injections of the EAS
� Severity ranged from mild to severe � Many presented with behavioral changes (aggression and/or irritability) which resolved with treatment
MRI Findings � 11 MRI’s – idic(15) – 9 and int dup(15) – 2
� 8/11 children had hippocampal malformation with incomplete hippocampal inversion that was bilateral in 7 and right in 1
� 2/11 children had unilateral mesial temporal sclerosis (both idic(15) with refractory seizures)
� Hypoplasia of the corpus callosum, which is the most previous reported finding, was present in two children
� Boronat et al. – in review
MRI
MRI
Dup15q Center (MGH and Lurie Center) � Ron Thibert, DO, MsPH – Pediatric Epilepsy � Heidi Pfeifer RD, LDN – Clinical Dietitian � Amy Morgan, PhD – Neuropsychologist � Ken Sassower, MD – Sleep Medicine � Chris McDougle, MD -‐ Psychiatrist � Susan Connors, MD – Adult Development � Garrett Zella, MD – GI � Meghan Parrish, RN – Nursing � Janette Lawrence, MS, CGC – Genetic Counselor