Patau syndrome with long survival in a case of unusual mosaic trisomy 13

Giuseppina Fogu a,*, Emanuela Maserati b, Francesca Cambosu a, Maria Antonietta Moro a, Fausto Poddie a, Giovanna Soro a, Pasquale Bandiera c, Gigliola Serra d, Gianni Tusacciu d, Giuseppina Sanna d, Vittorio Mazzarello c, Andrea Montella c
a Clinical Genetics, Department of Biomedical Sciences, University of Sassari, viale San Pietro,
43/C, 07100 Sassari, Italy
b Department of Experimental and Clinical Biomedical Sciences, University of Insubria, Varese, Italy
c Anatomy and Histology Division, Department of Biomedical Sciences, University of Sassari, Italy
d Institute of Child Neuropsychiatry, University of Sassari, Italy
 
Received 21 January 2008; accepted 27 March 2008
Available online 9 April 2008
 
 
Abstract / Resumo
We report a 12-year-old patient with Patau syndrome, in whom two cell lines were present from birth, one with total trisomy 13 due to isochromosome (13q), and one with partial trisomy 13. A cytogenetic re-evaluation at 9 years of age brought to light in skin fibroblasts a third cell line, partially monosomic for chromosome 13. The derivatives (13) present in the three cell lines were characterized through fluorescence in situ hybridization (FISH) experiments with suitable probes; the results suggested a sequence of rearrangements which beginning from an isochromosome (13q) could have led to the other two derivatives. We report the clinical data at birth and at the age of 12; at this age pigmentary lesions with phylloid pattern were noted. Cytogenetic findings of the chromosomal analyses on different tissues, including skin fibroblasts from differently pigmented areas, are also reported. 2008 Elsevier Masson SAS. All rights reserved.
 
Keywords: Patau syndrome; Trisomy 13; Mosaicism; FISH; Phylloid hypomelanosis
 
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