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Acropectorovertebral dysgenesis (F syndrome) maps to chromosome 2q36
  1. H Thiele1,2,
  2. C McCann4,
  3. S van’t Padje1,
  4. G C Schwabe1,3,
  5. H C Hennies2,
  6. G Camera5,
  7. J Opitz7,
  8. R Laxova6,
  9. S Mundlos1,3,
  10. P Nürnberg1,2
  1. 1Institute for Medical Genetics, Charité University Hospital, Humboldt-University, Berlin, Germany
  2. 2Gene Mapping Centre, Max Delbrueck Centre for Molecular Medicine, Berlin-Buch, Germany
  3. 3Max Planck Institute for Molecular Genetics, Ihnestr. 73, 14195, Berlin, Germany
  4. 4Providence Alaska Medical Genetics Center, Anchorage, USA
  5. 5Servicio di Genetica e Dismorfologia, Ospedali Galliera, Genoa, Italy
  6. 6Clinical Genetics Center, University of Wisconsin-Madison, USA
  7. 7Pediatrics (Medical Genetics), Human Genetics, Obstetrics & Gynecology, Pathology, University of Utah, Salt Lake City, Utah, USA
  1. Correspondence to:
 Stefan Mundlos
 Institute for Medical Genetics, Charité University Hospital, Augustenburger Platz 1, D-13353 Berlin, Germany;

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The F form of acropectorovertebral dysgenesis, also called F syndrome, is a rare dominantly inherited fully penetrant skeletal disorder.1 The name of the syndrome is derived from the first letter of the surname of the family in which it was originally described. Major anomalies include carpal synostoses, malformation of first and second fingers with frequent syndactyly between these digits, hypoplasia and dysgenesis of metatarsal bones with invariable synostosis of the proximal portions of the fourth and fifth metatarsals, variable degrees of duplication of distal portions of preaxial toes, extensive webbing between adjacent toes, prominence of the sternum with variable pectus excavatum and spina bifida occulta of L3 or S1. Affected individuals also have minor craniofacial anomalies and moderate impairment of performance on psychometric tests.3

Two families have been reported to date. The condition was first described by Grosse1 in eight members of a four generation American family of European origin. Camera4 presented an Italian family with two affected relatives and a very similar phenotype, suggesting the diagnosis of F syndrome. Recently, Dundar et al2 reported a six generation Turkish family with an acropectoral-like condition showing some phenotypic overlap with F syndrome. Affected individuals have soft tissue syndactyly of all fingers and toes and, to a variable degree, pre-axial polydactyly of hands and feet. The condition was mapped to chromosome region 7q36.

Here we report that the F syndrome family originally described by Grosse et al1 maps to chromosome region 2q36 and is thus distinct from the acropectoral syndrome published by Dundar et al.2


At the time of the original study in 1968,1 the F family consisted of four generations of affected and unaffected persons. A fifth generation born since then includes an affected female and two affected males. A total of nine …

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  • This work was supported by a grant from the Deutsche Forschungsgemeinschaft to S.M. and by grant 01 GR 0104 to P.N.