ChromosOmics - Database

Icon by Leon Liehr                   

                                                  CHROMOSOME #12 -                                                 
START

Specific PATIENTINFORMATION for sSMC(12)

clinical symptoms


In general 70% of sSMC carriers are clinically normal. The figures listed above
are based on the bias, that mainly clinically aberrant cases are studied and reported in literature!


UPD (uniparental disomy) cases: UPD(12)mat UPD(12)pat UPD(12)mat or pat

the probably non-dosage sensitive pericentric region of chromosome 12

schematic

cytogenetic

depiction

short (= p-) arm het long (= q-) arm









































p13 p12 p11 cen q12 q13 q14

































































*






















































































































































no clinical
signs



























































































clinical
signs


















































* acc. to GTG-data

schematic

molecular-

cytogenetic

depiction

Data is converted between genome versions by UCSC browser!
Note the changes defined there for centromere-sizes; due to that and due to 'new insertions and deletions', positions are not always seeming logical comparing different versions listed 




genomic version
critical
region
p-arm
uncritical
region
p-arm
centromere uncritical
region
q-arm
critical
region
q-arm
NCBI 36/ hg18 unknown 28.47 33.20 - 36.50 39.90 40.20
GRCh 37/ hg19 unknown 28.58 33.30 - 38.20 41.91 42.00
GRCh 38/ hg38 unknown 28.43 33.20 - 37.80 41.22 41.52
  Positions given in megabasepair (Mbp)
acc. to cases marked as ***

clinical symptoms

body region signs and symptoms
12p-cen-near
[%]
12q-cen-near
[%]
i(12p)
[%]
fingers long 0 33 0
growth growth retardation (prenatal and/or postnatal) 25 33 0

obesity 25 0 0

overgrowth (prenatal and/or postnatal) 0 0 31
head - eyes nystagmus 50 0 0

strabism 25 0 0
head - face cleft palate 0 0 6

epicanthus 0 0 47

facial dysmorphism (no details given, or others than listed; i.e. unspecific ones) 75 100 100

hearing loss / problems 0 0 14

hypertelorism and / or telecanthus 0 0 94

macroglossia 0 0 35

retrognathia 0 33 0
head - skull/ brain microcephaly 25 33 0

plagiocephaly 50 0 0
heart artrial septal defect (ASD) 25 33 0

cardiomegalie 25 0 0

heart defect (not specified) 25 0 0
mental autism 0 33 0

developmental delay 50 100 100

mental retardation 25 67 100
muscles hypotonia 50 0 100
neuronal seizures 0 0 59
skin hyperpigmentation / streaky pigmentation 0 0 26

hypomelanotic streaks 0 0 26






cases included 4 3 51