title: Terminal osseous dysplasia with pigmentary defects: clinical description of a new family.
abstract: Terminal osseous dysplasia with pigmentary defects is an extremely rare condition characterized by the triad of pigmentary anomalies of the skin, skeletal abnormalities of the limbs and recurring digital fibromatosis of childhood, with considerable interfamilial and intrafamilial variability of expression. It has recently been added to the small group of X-linked dominant disorder with prenatal male lethality on the basis of a four-generation pedigree in which only females were affected, male progeny was decreased and the number of spontaneous abortions was increased. In this clinical report, we describe a 2-year-old girl with full expression of the syndrome including skin defects, skeletal anomalies and recurrent fibromatosis of fingers and toes and her mother who presents with only multiple hypertrophic oral frenula. As previously demonstrated, our patients also show an extremely skewed X-inactivation on blood cells, strongly suggesting that there is selective disadvantage for cells carrying the mutated gene on their active X chromosome. Terminal osseous dysplasia with pigmentary defects could represent an additional example of extreme intrafamilial variability as already described for other X-linked dominant disorders.
authors.affiliation: Unit of Medical Genetics, ASL, Imola, Italy. a.baroncini@ausl.imola.bo.it
authors.forename: Anna
authors.initials: A
authors.lastname: Baroncini
authors.forename: Pia
authors.initials: P
authors.lastname: Castelluccio
authors.forename: Manuela
authors.initials: M
authors.lastname: Morleo
authors.forename: Fiorenza
authors.initials: F
authors.lastname: Soli
authors.forename: Brunella
authors.initials: B
authors.lastname: Franco
mesh_terms: D000015:Abnormalities, Multiple / Q000175:diagnosis* / Q000235:genetics; D001848:Bone Diseases, Developmental / Q000175:diagnosis* / Q000235:genetics; D001842:Bone and Bones / Q000000981:diagnostic imaging; D002675:Child, Preschool; D004252:DNA Mutational Analysis; D005260:Female; D040181:Genetic Diseases, X-Linked / Q000175:diagnosis* / Q000235:genetics; D006801:Humans; D010375:Pedigree; D010859:Pigmentation Disorders / Q000175:diagnosis* / Q000235:genetics; D011506:Proteins / Q000235:genetics; D011859:Radiography; D012868:Skin Abnormalities / Q000175:diagnosis* / Q000235:genetics; D049951:X Chromosome Inactivation
chemical_list: C115130:OFD1 protein, human; D011506:Proteins