Dental findings in a family with hyperparathyroidism-jaw tumor syndrome and a novel HRPT2 gene mutation.
Hyperparathyroidism-jaw tumor syndrome (HPT-JT) is an important diagnosis because of the possible involvement of other family members and risk of malignant disease. We report clinical and genetic studies in a previously undocumented Australian family with HPT-JT. The proband and his sister presented with bilateral or recurrent mandibular radiolucencies diagnosed histopathologically as cemento-ossifying fibromas. Mutation screening of the recently identified disease gene HRPT2 was performed by direct sequencing in 3 affected members. This revealed a novel mutation in exon 1 of HRPT2 (nt 20AGGACG --> GGGAG), which is predicted to inactivate the parafibromin protein through protein truncation and premature termination of translation. The terminology used for the jaw lesions in this syndrome warrants review to become more consistent. Cemento-ossifying fibroma is the preferred term to better reflect the pathologies found in most individuals and families,and to emphasize the significance of the jaw lesions in the diagnosis of the syndrome.
Aldred
Michael J
MJ
Dorevitch Pathology, Victoria 3084, Australia. oralpathologists@maynegroup.com
Talacko
Anna A
AA
Savarirayan
Ravi
R
Murdolo
Vince
V
Mills
Alan E
AE
Radden
Bryan G
BG
Alimov
Andrei
A
Villablanca
Andrea
A
Larsson
Catharina
C
D000236:Adenoma / Q000235:genetics; D000293:Adolescent; D000328:Adult; D001315:Australia; D002485:Cementoma / Q000150:complications / Q000235:genetics* / Q000473:pathology; D018389:Codon, Nonsense; D004252:DNA Mutational Analysis; D005260:Female; D018214:Fibroma, Ossifying / Q000150:complications / Q000235:genetics* / Q000473:pathology; D018095:Germ-Line Mutation; D006801:Humans; D049950:Hyperparathyroidism, Primary / Q000150:complications / Q000235:genetics* / Q000473:pathology; D008297:Male; D008339:Mandibular Neoplasms / Q000150:complications / Q000235:genetics*; D008875:Middle Aged; D010282:Parathyroid Neoplasms / Q000235:genetics; D010375:Pedigree; D013577:Syndrome; D014092:Tooth Root / Q000473:pathology; D025521:Tumor Suppressor Proteins / Q000235:genetics
C454900:CDC73 protein, human; D018389:Codon, Nonsense; D025521:Tumor Suppressor Proteins