TY - JOUR
T1 - Contributing factors in the pathogenesis of acquired cholesteatoma
T2 - Size analysis based on MDCT
AU - Yamashita, Koji
AU - Yoshiura, Takashi
AU - Hiwatashi, Akio
AU - Tuvshinjargal, Dashjamts
AU - Kamano, Hironori
AU - Shiratsuchi, Hideki
AU - Honda, Hiroshi
PY - 2011/5
Y1 - 2011/5
N2 - OBJECTIVE. The purpose of this article is to explore the factors that contribute to the occurrence of cholesteatoma. We studied the size of the mastoid air cells and the tympanic cavity using high-resolution CT. MATERIALS AND METHODS. Temporal bone CT scans of consecutive patients with unilateral cholesteatoma and healthy control subjects were retrospectively analyzed. We compared the total volume and the greatest cross-sectional area of the cavities of the combined mastoid air cells and tympanic cavity between the affected and unaffected sides in patients with cholesteatoma and in the control subjects. We also compared separately the measured volumes of the cavities of the mastoid air cells and tympanic cavity between the unaffected side of the patients with cholesteatoma and the control subjects. RESULTS. One hundred temporal bones of 50 patients with cholesteatoma and 50 control subjects were included. Both the volume and the cross-sectional area of the cavities of the combined mastoid air cells and tympanic cavity in the affected side of the patients with cholesteatoma were significantly smaller than those in the unaffected side (p < 0.001). Moreover, both the volume and the cross-sectional area of the cavities of the combined mastoid air cells and tympanic cavity in both affected and unaffected sides of patients with cholesteatoma were significantly smaller than those in control subjects (p < 0.001). The volume of the cavities of the mastoid air cells in the unaffected side of patients with cholesteatoma was smaller than that of the control subjects (p < 0.001). In contrast, no significant difference was found in the tympanic cavity volume between the unaffected side and the control subjects. CONCLUSION. Our results were consistent with the hypothesized contribution of mastoid air cell underdevelopment to the occurrence of cholesteatoma. A small tympanic cavity is less likely to contribute to the occurrence of cholesteatoma.
AB - OBJECTIVE. The purpose of this article is to explore the factors that contribute to the occurrence of cholesteatoma. We studied the size of the mastoid air cells and the tympanic cavity using high-resolution CT. MATERIALS AND METHODS. Temporal bone CT scans of consecutive patients with unilateral cholesteatoma and healthy control subjects were retrospectively analyzed. We compared the total volume and the greatest cross-sectional area of the cavities of the combined mastoid air cells and tympanic cavity between the affected and unaffected sides in patients with cholesteatoma and in the control subjects. We also compared separately the measured volumes of the cavities of the mastoid air cells and tympanic cavity between the unaffected side of the patients with cholesteatoma and the control subjects. RESULTS. One hundred temporal bones of 50 patients with cholesteatoma and 50 control subjects were included. Both the volume and the cross-sectional area of the cavities of the combined mastoid air cells and tympanic cavity in the affected side of the patients with cholesteatoma were significantly smaller than those in the unaffected side (p < 0.001). Moreover, both the volume and the cross-sectional area of the cavities of the combined mastoid air cells and tympanic cavity in both affected and unaffected sides of patients with cholesteatoma were significantly smaller than those in control subjects (p < 0.001). The volume of the cavities of the mastoid air cells in the unaffected side of patients with cholesteatoma was smaller than that of the control subjects (p < 0.001). In contrast, no significant difference was found in the tympanic cavity volume between the unaffected side and the control subjects. CONCLUSION. Our results were consistent with the hypothesized contribution of mastoid air cell underdevelopment to the occurrence of cholesteatoma. A small tympanic cavity is less likely to contribute to the occurrence of cholesteatoma.
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U2 - 10.2214/AJR.10.5414
DO - 10.2214/AJR.10.5414
M3 - Article
C2 - 21512088
AN - SCOPUS:79959584948
SN - 0361-803X
VL - 196
SP - 1172
EP - 1175
JO - The American journal of roentgenology and radium therapy
JF - The American journal of roentgenology and radium therapy
IS - 5
ER -