Analysis of misdiagnosis and MR findings of atypical invasive pituitary adenoma / 实用放射学杂志

ABSTRACT

Objective To investigate MR findings and analysis of misdiagnosis of atypical invasive pituitary adenoma.Methods The MR findings of twenty cases of atypical invasive pituity adenomas confirmed by pathology were reviewed ,which were misdiag-nosed as chordomas or meningiomas.Results All the twenty cases showed iso-or slightly hypo-signal on T1 WI,iso-or slightly hy-per-signal on T2 WI;Enhanced scan displayed heterogeneous enhancement.The dynamic enhancement curve showed rapid enhance-ment phase.The bilateral cavernous sinuswere infringed in nine cases,in which the pituity and pituity stalk were not well seen. Among the twenty cases,twelve cases with suprasellar and anterior cranial fossa extension were misdiagnosed as meningiomas;eight cases with clival destruction were misdiagnosed as chordomas.Conclusion The MR features of atypical invasive pituity adenomas are various.In order to avoid misdiagnosis,a comprehensive analysis should be based on a variety of signs.