Trisomy 12p Parent Support Organization

The Trisomy 12p Parent Support Organization is an international, non-profit, self-help organization dedicated to providing information, assistance, and support to families of individuals with trisomies of the short arm (p) of chromosome 12 or other abnormalities involving the 12th chromosome. Chromosome 12, trisomy 12p, is an extremely rare chromosomal disorder in which a portion of the short arm of the 12th chromosome (12p) appears three times (trisomy) rather than twice in cells of the body. The disorder may be characterized by abnormal growth delays after birth (postnatal growth retardation); delays in the acquisition of skills requiring the coordination of mental and muscular activity (psychomotor retardation); mental retardation; abnormally diminished muscle tone (hypotonia); characteristic malformations of the head and facial (craniofacial) area; abnormally short, wide hands; and/or other abnormalities. Associated symptoms and physical findings may vary from case to case, depending upon the exact length and location of the duplicated portion of chromosome 12p. Established in 1997, the Trisomy 12p Parent Support Organization provides networking opportunities that enable affected families to exchange information, support, and helpful resources.