Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Tumours
Abstract number: 25496
COMPLEMENTARY RELATION BETWEEN MRI AND FNAC IN CLINICAL
DIAGNOSIS OF SOFT TISSUE TUMORS
Yasuyuki KITAGAWA 1 , Yoko ISHIHARA 1 , Mikihiko HAYASHI 1 , Yong KIM 1 , Nobuhito
FUJII 1 , Hiromoto ITO 2 , Masaru HOSONE 3 , Shotaro MAEDA 3
1 Dept of Orthopaedic Surgery, Tamanagayama Hospital, Nippon Medical School,
Tokyo (JAPAN), 2 Dept of Orthopaedic Surgery, Nippon Medical School, Tokyo
(JAPAN), 3 Dept of Pathology, Tamanagayama Hospital, Nippon Medical School,
Tokyo (JAPAN)
Introduction: Making a clinical diagnosis of a soft tissue tumor is difficult. MRI can
show the signals of whole a lesion and the relations to the adjacent tissues.
However, the signals of lesions on MRI are frequently nonspecific for diagnosis. On
the other hand, the fine needle aspiration cytology (FNAC) differentiate between
benign and malignant soft tissue lesions when adequate material is collected.
However, the material is frequently so small and occasionally insufficient. As
mentioned above, MRI and FNAC have complementary relation in diagnosis of soft
tissue tumors theoretically. Through the recent clinical practice, the relation between
MRI and FNAC in clinical diagnosis was reviewed.Materials and methods: A
retrospective review of 147 patients (153 lesions; 137 benign and 16 malignant) who
underwent both preoperative MRI and FNAC was undertaken. The diagnostic rates
of MRI and FNAC were calculated based on their results. The interrelationships
between the two results were also reviewed.Results: Regarding differentiation
between benign and malignant lesions, the diagnostic rates of MRI and FNAC were
82% and 84%. The diagnostic rate of both MRI and FNAC was 94%. In 56% of the
lesions which could not be diagnosed by MRI, FNAC made diagnoses of them.
Discussion: When both MRI and FNAC are used as preoperative examinations for
soft tissue tumors, the diagnostic rate is improved, probably because of their
theoretical complementary relation.
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