Discussion
Partial trisomy 15 (15q24-15qter) is an extremely rare chromosomal anomaly. Only several cases have been reported in the literature. In addition to constant mental retardation, the most commonly reported features of this condition are:
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abnormal fingers and toes;
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congenital cardiopathies;
References
Chandler K, Schrander-Stumpel CT, Engelen J, Theunissen P, Fryns JP. Partial trisomy 15q: report of a patient and literature review. Genet Couns. 1997;8(2):91-7.Bonati MT, Finelli P, Giardino D, Gottardi G, Roberts W, Larizza L. Trisomy 15q25.2-qter in an autistic child: genotype-phenotype correlations. Am J Med Genet A. 2005 Mar 1;133(2):184-8. Roggenbuck JA, Mendelsohn NJ, Tenenholz B, Ladda RL, Fink JM. Duplication of the distal long arm of chromosome 15: report of three new patients and review of the literature. Am J Med Genet A. 2004 May 1;126(4):398-402.Zollino M, Tiziano F, Di Stefano C, Neri G. Partial duplication of the long arm of chromosome 15: confirmation of a causative role in craniosynostosis and definition of a 15q25-qter trisomy syndrome. Am J Med Genet. 1999 Dec 22;87(5):391-4.Nagai T, Shimokawa O, Harada N, Sakazume S, Ohashi H, Matsumoto N, Obata K, Yoshino A, Murakami N, Murai T, Sakuta R, Niikawa N. Postnatal overgrowth by 15q-trisomy and intrauterine growth retardation by 15q-monosomy due to familial translocation t(13;15): dosage effect of IGF1R? Am J Med Genet. 2002 Nov 22;113(2):173-7.Faivre L, Gosset P, Cormier-Daire V, Odent S, Amiel J, Giurgea I, Nassogne MC, Pasquier L, Munnich A, Romana S, Prieur M, Vekemans M, De Blois MC, Turleau C. Overgrowth and trisomy 15q26.1-qter including the IGF1 receptor gene: report of two families and review of the literature. Eur J Hum Genet. 2002 Nov;10(11):699-706.Engelen JJ, Marcelis CL, Alofs MG, Loneus WH, Pulles-Heintzberger CF, Hamers AJ. De novo "pure" partial trisomy (6)(p22.1-->pter) in a chromosome 15 with an enlarged satellite, identified by microdissection. Am J Med Genet. 2001 Feb 15;99(1):48-53.Kaneko K, Katabuchi H, Maruta H. Partial trisomy for the distal part of the long arm of chromosome 15--a new syndrome? Nippon Sanka Fujinka Gakkai Zasshi. 1986 Jun;38(6):940-4.Schnatterly P, Bono KL, Robinow M, Wyandt HE, Kardon N, Kelly TE. Distal 15q trisomy: phenotypic comparison of nine cases in an extended family. Am J Hum Genet. 1984 Mar;36(2):444-51.