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Technetium-99m-sestamibi scintimammography of breast lesions: clinical and pathological follow-up.

AbstractUNLABELLED:
Mammography and physical examination combined have a sensitivity of 85% for the detection of breast carcinoma. Mammography also has a positive predictive value of 15%-30%. The aim of this study was to evaluate the usefulness of scintimammography using 99mTc-sestamibi as a complementary technique to mammography for the detection of breast carcinoma to improve mammography's sensitivity and specificity.
METHODS:
We studied 100 consecutive patients (mean age 48.3 +/- 10.8 yr) who had 106 lesions warranting biopsy (67 lesions) or fine needle aspiration cytology (FNA) (39 lesions) of the breast. There were 85 palpable and 21 nonpalpable lesions. The size of the lesions on the mammograms were moderate (2.3 +/- 1.8 x 1.9 +/- 1.5 cm). Each patient received 20 mCi 99mTc-sestamibi intravenously. Five and 60 min postinjection, planar breast images in the lateral prone position were obtained. An anterior erect projection was then obtained to visualize the axilla and, if needed, a posterior oblique prone projection.
RESULTS:
Scintimammography was true-positive in 30 lesions with biopsy-confirmed breast carcinoma; it was true-negative in 65 lesions subsequently proved to be benign. There were nine breast lesions with benign findings in which the scintimammography result was positive (false-positive scintimammography) for cancer. Finally, two lesions with pathologically proven carcinomas demonstrated a negative scintimammographic result. Therefore, in this group, the sensitivity of scintimammography was 93.7% with a specificity of 87.8%; the positive predictive value was 76.9%. The negative predictive value was 97%.
CONCLUSION:
Scintimammography is a highly sensitive test that improves the specificity of conventional mammography for the detection of breast carcinoma.
AuthorsI Khalkhali, J Cutrone, I Mena, L Diggles, R Venegas, H Vargas, B Jackson, S Klein
JournalJournal of nuclear medicine : official publication, Society of Nuclear Medicine (J Nucl Med) Vol. 36 Issue 10 Pg. 1784-9 (Oct 1995) ISSN: 0161-5505 [Print] United States
PMID7562043 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Technetium Tc 99m Sestamibi
Topics
  • Biopsy, Needle
  • Breast (pathology)
  • Breast Neoplasms (diagnostic imaging, pathology)
  • Cohort Studies
  • False Negative Reactions
  • False Positive Reactions
  • Female
  • Humans
  • Middle Aged
  • Predictive Value of Tests
  • Radiography
  • Radionuclide Imaging
  • Sensitivity and Specificity
  • Technetium Tc 99m Sestamibi

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