Are Hounsfield Unit Measurements of Bony Absorption Changes in Cholesteatoma Helpful?

Introduction High-resolution computed tomography (HRCT) scans of the temporal bone are used to assess the bony erosion of the middle-ear structures whenever cholesteatoma is suspected. Objective To study the differences in HRCT Hounsfield unit (HU) index measurements of middle-ear bony st...

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Autores principales:	Shay Shemesh, Judith Luckman, Tal Marom, Oded Kraus, Sharon Ovnat Tamir
Formato:	article
Lenguaje:	EN
Publicado:	Thieme Revinter Publicações Ltda. 2021
Materias:	computed tomography hounsfield unit cholesteatoma ossicles Medicine R Otorhinolaryngology RF1-547
Acceso en línea:	https://doaj.org/article/5ef46f3fbcca4093b109fbad11b8b8ae
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spelling	oai:doaj.org-article:5ef46f3fbcca4093b109fbad11b8b8ae2021-11-11T23:56:01ZAre Hounsfield Unit Measurements of Bony Absorption Changes in Cholesteatoma Helpful?1809-97771809-486410.1055/s-0041-1736580https://doaj.org/article/5ef46f3fbcca4093b109fbad11b8b8ae2021-11-01T00:00:00Zhttp://www.thieme-connect.de/DOI/DOI?10.1055/s-0041-1736580https://doaj.org/toc/1809-9777https://doaj.org/toc/1809-4864Introduction High-resolution computed tomography (HRCT) scans of the temporal bone are used to assess the bony erosion of the middle-ear structures whenever cholesteatoma is suspected. Objective To study the differences in HRCT Hounsfield unit (HU) index measurements of middle-ear bony structures between an ears with and without cholesteatoma. Methods A retrospective study of 59 patients who underwent surgery due to unilateral cholesteatoma. The HRCT HU index of the scutum, of three middle-ear ossicles, of the lateral semicircular canal (LSCC), and of the fallopian canal was measured in both ears. A comparison was made between the cholesteatoma and the non-cholesteatomatous ear (control). All measurements were conducted by an otolaryngologist. To assess the interobserver bias, 10% of the samples were randomly and independently assessed by another otolaryngologist and a neuroradiologist who were blinded. Results The average HU index was lower in the ear with cholesteatoma when compared with the non-cholesteatomatous ear. While the differences were statistically significant regarding the measurements of the scutum (516.02 ± 311.693 versus 855.64 ± 389.999; p = 0.001), the malleus (1049.44 ± 481.765 versus 1413.47 ± 313.376; p = 0.01), and the incus (498.03 ± 264.184 versus 714.25 ± 405.631; p = 0.001), the differences in the measurements of the LSCC (1042.34 ± 301.066 versus 1154.53 ± 359.609; p = 0.69) and of the fallopian canal (467.19 ± 221.556 versus 543.51 ± 263.573; p = 0.108) were not significantly different between both groups. The stapes was immeasurable in both groups due to its small size. Conclusion Hounsfield unit index measurements are a useful tool that may aid in the diagnosis of early-stage cholesteatoma.Shay ShemeshJudith LuckmanTal MaromOded KrausSharon Ovnat TamirThieme Revinter Publicações Ltda.articlecomputed tomographyhounsfield unitcholesteatomaossiclesMedicineROtorhinolaryngologyRF1-547ENInternational Archives of Otorhinolaryngology (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	computed tomography hounsfield unit cholesteatoma ossicles Medicine R Otorhinolaryngology RF1-547
spellingShingle	computed tomography hounsfield unit cholesteatoma ossicles Medicine R Otorhinolaryngology RF1-547 Shay Shemesh Judith Luckman Tal Marom Oded Kraus Sharon Ovnat Tamir Are Hounsfield Unit Measurements of Bony Absorption Changes in Cholesteatoma Helpful?
description	Introduction High-resolution computed tomography (HRCT) scans of the temporal bone are used to assess the bony erosion of the middle-ear structures whenever cholesteatoma is suspected. Objective To study the differences in HRCT Hounsfield unit (HU) index measurements of middle-ear bony structures between an ears with and without cholesteatoma. Methods A retrospective study of 59 patients who underwent surgery due to unilateral cholesteatoma. The HRCT HU index of the scutum, of three middle-ear ossicles, of the lateral semicircular canal (LSCC), and of the fallopian canal was measured in both ears. A comparison was made between the cholesteatoma and the non-cholesteatomatous ear (control). All measurements were conducted by an otolaryngologist. To assess the interobserver bias, 10% of the samples were randomly and independently assessed by another otolaryngologist and a neuroradiologist who were blinded. Results The average HU index was lower in the ear with cholesteatoma when compared with the non-cholesteatomatous ear. While the differences were statistically significant regarding the measurements of the scutum (516.02 ± 311.693 versus 855.64 ± 389.999; p = 0.001), the malleus (1049.44 ± 481.765 versus 1413.47 ± 313.376; p = 0.01), and the incus (498.03 ± 264.184 versus 714.25 ± 405.631; p = 0.001), the differences in the measurements of the LSCC (1042.34 ± 301.066 versus 1154.53 ± 359.609; p = 0.69) and of the fallopian canal (467.19 ± 221.556 versus 543.51 ± 263.573; p = 0.108) were not significantly different between both groups. The stapes was immeasurable in both groups due to its small size. Conclusion Hounsfield unit index measurements are a useful tool that may aid in the diagnosis of early-stage cholesteatoma.
format	article
author	Shay Shemesh Judith Luckman Tal Marom Oded Kraus Sharon Ovnat Tamir
author_facet	Shay Shemesh Judith Luckman Tal Marom Oded Kraus Sharon Ovnat Tamir
author_sort	Shay Shemesh
title	Are Hounsfield Unit Measurements of Bony Absorption Changes in Cholesteatoma Helpful?
title_short	Are Hounsfield Unit Measurements of Bony Absorption Changes in Cholesteatoma Helpful?
title_full	Are Hounsfield Unit Measurements of Bony Absorption Changes in Cholesteatoma Helpful?
title_fullStr	Are Hounsfield Unit Measurements of Bony Absorption Changes in Cholesteatoma Helpful?
title_full_unstemmed	Are Hounsfield Unit Measurements of Bony Absorption Changes in Cholesteatoma Helpful?
title_sort	are hounsfield unit measurements of bony absorption changes in cholesteatoma helpful?
publisher	Thieme Revinter Publicações Ltda.
publishDate	2021
url	https://doaj.org/article/5ef46f3fbcca4093b109fbad11b8b8ae
work_keys_str_mv	AT shayshemesh arehounsfieldunitmeasurementsofbonyabsorptionchangesincholesteatomahelpful AT judithluckman arehounsfieldunitmeasurementsofbonyabsorptionchangesincholesteatomahelpful AT talmarom arehounsfieldunitmeasurementsofbonyabsorptionchangesincholesteatomahelpful AT odedkraus arehounsfieldunitmeasurementsofbonyabsorptionchangesincholesteatomahelpful AT sharonovnattamir arehounsfieldunitmeasurementsofbonyabsorptionchangesincholesteatomahelpful
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Are Hounsfield Unit Measurements of Bony Absorption Changes in Cholesteatoma Helpful?

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