[Analysis of misdiagnosis of the skull base lesions with PET-CT].
OBJECTIVE
To investigate the causes of misdiagnosis for skull base lesions by PET-CT, and to recognize the working principal and the false-positive results of PET-CT for reducing the misdiagnosis rate.


METHODS
The lesions of case 1 involved the pharynx nasalis, pterygopalatine fossa, and orbital apex base of skull, and the lesions of case 2 involved the base of sella were performed with CT, MRI and PET-CT examination. Both of the cases were treated with surgery and histopathologic examination.


RESULTS
Two cases were diagnosed as nasopharyngeal carcinoma and carcinoma of base of sella by PET-CT, respectively. However, they were finally diagnosed mycosis and pituitary tumor by histopathologic examination after operation.


CONCLUSIONS
PET-CT examination in the skull base lesions may give false-positive result. Both clinical information and other imaging examinations should be considered to reduce the misdiagnosis skull base lesions only by PET-CT.
Sun
Jinjie
J
Department of Otolaryngology, Xiangya Hospital,Central South University, Changsha, 410008, China.
Jiang
Weihong
W
Zhao
Suping
S
Zhang
Xin
X
D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D008875:Middle Aged; D049268:Positron-Emission Tomography; D019291:Skull Base / Q000000981:diagnostic imaging*; D019292:Skull Base Neoplasms / Q000000981:diagnostic imaging