I have no experience on this field !

The below information might be useful

check this out: some literature and see how it matches your subject's condition!

1) The American Academy of Pedodontics/Vol. 3, No. 4

Ring chromosome 5 with dental anomalies

Katherine Kula, DMD Shivanand Patil, PhD

James Hanson, MD Arthur Nowak, DMD Hans Zellweger, MD

2)  Am J Med Genet. 1994 Jan 1;49(1):108-10.

Ring chromosome 5 associated with severe growth retardation as the sole major physical abnormality.

Migliori MV1, Cherubini V, Bartolotta E, Pettinari A, Pecora R.

3) European Journal of Medical Genetics Volume 55, Issue 2, February 2012, Pages 112–116

Clinical and molecular cytogenetic studies in ring chromosome 5: Report of a child with congenital abnormalities

Audrey Basinkoa,  Maria Luisa Giovannucci Uziellid, Gloria Scarsellid, Manuela Prioloe, Giuseppina Timpanif, Marc De Braekeleera, 

Thanks a lot!  Jochen

U r most welcome!  All the best!

Sorry so far I have not come across. 

so far, we just have experiences with patient  who have a ring chromosome 4. the information might be useful!

Meiotic prophase I defects in an oligospermic man with Wolf-Hirschhorn syndrome with ring chromosome 4.

All the information what you need about the marker Chromosomes you can found it in our website  http://ssmc-tl.com/sSMC.html

My experience in ring chromosome is in people exposed to lead.