The comparative analysis on MSCT manifestation between parotid gland lymphoma and pleomorphic adenoma

WANG Mingjie; LIANG Feng; LI Xudan; CHEN Shuyan

Abstract：Objective To discuss the MSCT findings of parotid gland lymphoma and pleomorphic adenoma and its diagnostic value. Methods The MSCT findings of 24 cases parotid gland lymphoma and 35 cases of pleomorphic adenoma by pathology were reviewed retrospectively, including their number, location, shape, border, scan density, CT enhancement characteristics, and so on. Results Number, shape, border were no statistically significant difference between parotid gland lymphoma and pleo-morphic adenoma ( P >0. 05). Parotid gland lymphoma was on the posterior inferior quadrant, higher scan density and signifi-cantly improved in enhanced arterial phase ( P <0. 05). Among the relevant signs, the posterior inferior quadrant had highest sensitivity (90. 3%), and significantly improved in enhanced arterial phase had the highest specificity (92. 4%). Combining the posterior inferior quadrant and higher scan density achieved highest sensitivity (83. 4%), and combining the posterior inferior quadrant and significantly improved in enhanced arterial phase achieved the highest specificity (94. 4%). When three signs were combined, the sensitivity and specificity were 63. 1% and 96. 4% respectively. Conclusion The posterior inferior quadrant, higher scan density and significantly improved in enhanced arterial phase had higher specificity in the MSCT diagnosis of parotid gland lymphoma and pleomorphic adenoma. The 3 signs combined use of most of the lesions can make a correct diagnosis preoper-atively.