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FINDINGS OF DEPRESSIO BIPARIETALIS CIRCUMSCRIPTA IN THE HISTORICAL OSSEOUS MATERIAL

FINDINGS OF DEPRESSIO BIPARIETALIS CIRCUMSCRIPTA IN THE HISTORICAL OSSEOUS MATERIAL Blanka Pospíšilová, Olga Procházková, Petr Pěkný, Josef Bavor INTRODUCTION

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FINDINGS OF DEPRESSIO BIPARIETALIS CIRCUMSCRIPTA IN THE HISTORICAL OSSEOUS MATERIAL

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  1. FINDINGS OF DEPRESSIO BIPARIETALIS CIRCUMSCRIPTA IN THE HISTORICAL OSSEOUS MATERIAL Blanka Pospíšilová, Olga Procházková, Petr Pěkný, Josef Bavor INTRODUCTION In the literature, the pathologic local thinning of lamina externa and mainly of the diploic layer of the parietal skull bones is often described as a "depressio biparietalis circumscripta" or “biparietal thinning”. This abnormality has interested pathologists as a disease accompanying old age. It is slowly progressive over the years. MATERIAL AND METHODS The collection of 647 adult dry skulls of both sexes and 98 child skulls dating from 13th-18th centuries (Broumov Ossuary, Czech Republic) was examinated for the presence of depressio biparietalis circumscripta. All positive findings have been documented by digital camera Camedia 3030 ZOOM, Olympus. In the one positive case (adult female skull, No B174), conventinal x-rays and computerized tomographic (CT) examination were performed. RESULTS Three typical cases (2 females and 1 male) /0.46%/ of depressio biparietalis circumscripta were diagnosed among adult skulls. In the skullsof children and adolescents no finding of this anomaly was observed. CONCLUSION 1.      In the Broumov Ossuary dry skull collection, the depressio biparietalis circumscripta was seen in adult dry skulls only. 2.      Three cases (0.46%) - 2 female and 1 male - were observed. 3.      In the adult female with the large depressio biparietalis circumscripta finding, the diagnosis was verified with x-rays and CT skull examination.

  2. REFERENCES Aufderheide AC, Rodriguéz-Martín C. The Cambridge encyclopedia of human paleopathology. Cambridge University Press, 1998:463. Breitinger E. Depressio biaprietalis circumscripta chez les anciens Egyptiens. Bull Mém Soc Anthrop Paris 1983;10:71-9. Fournier AM, Vague P, Lafon J. L´auto-résorption en bande symétrique du diploé pariétal (malum biparietale). J Radiol Electrol 1968;49:347-56. Stein W, Zajgner J. Symetryczne obustronne ścieńczenie kości ciemieniowych z objawem tzw. „niebieskich twardówek“. Neurol Neurochir Psychiat Polska 1965;15:183-5. Virchow R. Über die Involutionskrankheit (Malum senile) der platten Knochen. Verhandl Phys Med Gessellsch Würzberg 1854;4:354. Vítovec J. Malum neurocranii atrophicum localisatum externum. Radiol diagn 1986;27:179-85. Wiliams HU. Human paleopathology with some original observations on symmetrical osteoporosis of the skull. Arch Pathol 1929;7:840-903. Wilms G, Van Roost W, Van Russelt J, Smith J. Biparietal thinning: correlation with CT findings. Radiol 1983;23:385-6. FIGURES Fig 1: Depressio biparietalis circumscripta. Adult female dry skull (No B174), norma verticalis. Two large symmetrical areas of parietal thinnes. Fig. 2. The same skull (No B174), norma occipitalis. Bilateral important depression of the parietal bones. Fig 3: Conventional x-rays of the skull No B174, the lateral view: typical striking radiolucency in the parietal bone region. Fig 4: Coronal computerized tomographic (CT) scan (skull No B174) demonstrates the disappearance of the diploic layer and the thinning of the parietal bones. Fig. 5: Depressio biparietalis circumscripta. Adult male dry skull No B212, norma verticalis. Asymmetrical areas of biparietal thinnes. Fig 6: Depressio biparietalis circumscripta. Adult female dry skull No B173, norma verticalis. Two asymmetrical areas of parietal thinnes.

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