The Bone Mineral Density of the Lateral Skull Base and its Relation to Obesity and Spontaneous Cerebrospinal Fluid Leaks

Jonathan L. Hatch, Heather Schopper, Isabel M. Boersma, Habib G. Rizk, Shaun A. Nguyen, Paul R. Lambert, Theodore R. McRackan, Ted A. Meyer

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Abstract

OBJECTIVES: Evaluate the bone mineral density (BMD) of the lateral skull base by thin sliced computed tomography (CT) scans.Determine the BMD and its relation in patients who are obese or who have spontaneous cerebrospinal fluid (CSF) leaks. STUDY DESIGN: Blinded retrospective case control series. SETTING: Tertiary care university setting. PATIENTS: A control group consisting of age and sex matched non-obese patients were compared with obese and CSF leak patients. INTERVENTIONS: Three blinded reviewers measured the BMD at multiple locations along the lateral skull base using thin sliced high-resolution CT scans. Additional BMD measurements were obtained from the temporal bone squamosal and otic capsule. The BMD was compared between the groups. MAIN OUTCOME MEASURE: Lateral skull base BMD in patients who are obese or have CSF leaks as compared with non-obese controls. RESULTS: Sixty-five (n = 65) patients were included in the study. The control group (n = 21) had a median density along the tegmen of 499.4 (178.8) HU, obese (n = 26) had an average HU of 559.5 (207.2), and CSF leak group (n = 18) had an average 472.9 (154.9), respectively (p = 0.35). The BMD in the temporal bone squamosa (p = 0.07) was not significantly different, however, the otic capsule was denser in the CSF leak group (p = 0.01) compared with the control group or the obese group. The intraclass correlation coefficient of the CT reviewers' measurements were moderate to strong (k = 0.69-0.99). CONCLUSION: There appears to be no difference between the BMD of the lateral skull base as it relates to obesity or spontaneous CSF leaks compared with normal weight controls. These findings suggest the BMD does not have a significant role in the development of lateral skull base thinning or dehiscence leading to CSF leaks.

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Skull Base
Bone Density
Obesity
Temporal Bone
Tomography
Control Groups
Capsules
Ear
Cerebrospinal Fluid Leak
Tertiary Healthcare
Weights and Measures

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Sensory Systems
  • Clinical Neurology

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The Bone Mineral Density of the Lateral Skull Base and its Relation to Obesity and Spontaneous Cerebrospinal Fluid Leaks. / Hatch, Jonathan L.; Schopper, Heather; Boersma, Isabel M.; Rizk, Habib G.; Nguyen, Shaun A.; Lambert, Paul R.; McRackan, Theodore R.; Meyer, Ted A.

In: Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology, Vol. 39, No. 9, 01.10.2018, p. e831-e836.

Research output: Contribution to journalArticle

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abstract = "OBJECTIVES: Evaluate the bone mineral density (BMD) of the lateral skull base by thin sliced computed tomography (CT) scans.Determine the BMD and its relation in patients who are obese or who have spontaneous cerebrospinal fluid (CSF) leaks. STUDY DESIGN: Blinded retrospective case control series. SETTING: Tertiary care university setting. PATIENTS: A control group consisting of age and sex matched non-obese patients were compared with obese and CSF leak patients. INTERVENTIONS: Three blinded reviewers measured the BMD at multiple locations along the lateral skull base using thin sliced high-resolution CT scans. Additional BMD measurements were obtained from the temporal bone squamosal and otic capsule. The BMD was compared between the groups. MAIN OUTCOME MEASURE: Lateral skull base BMD in patients who are obese or have CSF leaks as compared with non-obese controls. RESULTS: Sixty-five (n = 65) patients were included in the study. The control group (n = 21) had a median density along the tegmen of 499.4 (178.8) HU, obese (n = 26) had an average HU of 559.5 (207.2), and CSF leak group (n = 18) had an average 472.9 (154.9), respectively (p = 0.35). The BMD in the temporal bone squamosa (p = 0.07) was not significantly different, however, the otic capsule was denser in the CSF leak group (p = 0.01) compared with the control group or the obese group. The intraclass correlation coefficient of the CT reviewers' measurements were moderate to strong (k = 0.69-0.99). CONCLUSION: There appears to be no difference between the BMD of the lateral skull base as it relates to obesity or spontaneous CSF leaks compared with normal weight controls. These findings suggest the BMD does not have a significant role in the development of lateral skull base thinning or dehiscence leading to CSF leaks.",
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AU - Hatch, Jonathan L.

AU - Schopper, Heather

AU - Boersma, Isabel M.

AU - Rizk, Habib G.

AU - Nguyen, Shaun A.

AU - Lambert, Paul R.

AU - McRackan, Theodore R.

AU - Meyer, Ted A.

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N2 - OBJECTIVES: Evaluate the bone mineral density (BMD) of the lateral skull base by thin sliced computed tomography (CT) scans.Determine the BMD and its relation in patients who are obese or who have spontaneous cerebrospinal fluid (CSF) leaks. STUDY DESIGN: Blinded retrospective case control series. SETTING: Tertiary care university setting. PATIENTS: A control group consisting of age and sex matched non-obese patients were compared with obese and CSF leak patients. INTERVENTIONS: Three blinded reviewers measured the BMD at multiple locations along the lateral skull base using thin sliced high-resolution CT scans. Additional BMD measurements were obtained from the temporal bone squamosal and otic capsule. The BMD was compared between the groups. MAIN OUTCOME MEASURE: Lateral skull base BMD in patients who are obese or have CSF leaks as compared with non-obese controls. RESULTS: Sixty-five (n = 65) patients were included in the study. The control group (n = 21) had a median density along the tegmen of 499.4 (178.8) HU, obese (n = 26) had an average HU of 559.5 (207.2), and CSF leak group (n = 18) had an average 472.9 (154.9), respectively (p = 0.35). The BMD in the temporal bone squamosa (p = 0.07) was not significantly different, however, the otic capsule was denser in the CSF leak group (p = 0.01) compared with the control group or the obese group. The intraclass correlation coefficient of the CT reviewers' measurements were moderate to strong (k = 0.69-0.99). CONCLUSION: There appears to be no difference between the BMD of the lateral skull base as it relates to obesity or spontaneous CSF leaks compared with normal weight controls. These findings suggest the BMD does not have a significant role in the development of lateral skull base thinning or dehiscence leading to CSF leaks.

AB - OBJECTIVES: Evaluate the bone mineral density (BMD) of the lateral skull base by thin sliced computed tomography (CT) scans.Determine the BMD and its relation in patients who are obese or who have spontaneous cerebrospinal fluid (CSF) leaks. STUDY DESIGN: Blinded retrospective case control series. SETTING: Tertiary care university setting. PATIENTS: A control group consisting of age and sex matched non-obese patients were compared with obese and CSF leak patients. INTERVENTIONS: Three blinded reviewers measured the BMD at multiple locations along the lateral skull base using thin sliced high-resolution CT scans. Additional BMD measurements were obtained from the temporal bone squamosal and otic capsule. The BMD was compared between the groups. MAIN OUTCOME MEASURE: Lateral skull base BMD in patients who are obese or have CSF leaks as compared with non-obese controls. RESULTS: Sixty-five (n = 65) patients were included in the study. The control group (n = 21) had a median density along the tegmen of 499.4 (178.8) HU, obese (n = 26) had an average HU of 559.5 (207.2), and CSF leak group (n = 18) had an average 472.9 (154.9), respectively (p = 0.35). The BMD in the temporal bone squamosa (p = 0.07) was not significantly different, however, the otic capsule was denser in the CSF leak group (p = 0.01) compared with the control group or the obese group. The intraclass correlation coefficient of the CT reviewers' measurements were moderate to strong (k = 0.69-0.99). CONCLUSION: There appears to be no difference between the BMD of the lateral skull base as it relates to obesity or spontaneous CSF leaks compared with normal weight controls. These findings suggest the BMD does not have a significant role in the development of lateral skull base thinning or dehiscence leading to CSF leaks.

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