Abstract | OBJECTIVES: To estimate whether breast uptake of (99m)Tc-(V)DMSA and (99m)Tc-sestamibi in usual ductal epithelial breast hyperplasia (UDH) and apocrine metaplasia is related to cell proliferation rate (Ki-67) and oestrogen receptor (ER) expression, both of which are associated with the potential risk of evolving to malignancy. METHODS: Among patients referred for suspicious breast findings on palpation and/or mammography and evaluated preoperatively with both radiopharmaceuticals, we retrospectively studied 17 (10 with UDH: group I; and seven with apocrine metaplasia: group II). Lesion-to-background (L/B) ratios in early and late acquisitions were calculated for both radiotracers in both groups, as well as their retention ratios. Ki-67 and oestrogen receptor expression were determined immunohistochemically. The late L/B ratios between the two tracers were compared, as were the late ratios for each tracer between Ki-67 < or = 3% and > 3%, and between ER < or = 15% and > 15%. Linear regression analysis was also performed between L/B and retention ratios and Ki-67 expression. RESULTS: There was a significant increase of the (99m)Tc-(V)DMSA L/B ratio in late images as compared to the early images in group I (P<0.05), while in group II it was not significantly increased (P=0.084). (99m)Tc-sestamibi ratios did not demonstrate variability over time in either group (P=0.156 and 0.274, respectively). Significant coefficient correlation was found between the (99m)Tc-(V)DMSA L/B(late) ratios and retention ratios and Ki-67 levels only for group I (r=0.889, P<0.001 and r=0.802, P<0.01, respectively). The (99m)Tc-(V)DMSA L/B(late) ratios in group I were significantly higher when Ki-67 > 3% than when Ki-67 < or = 3% (P=0.016) but did not differ considerably between ER > 15% and < or = 15% (P=0.732). CONCLUSION: (99m)Tc-(V)DMSA uptake in UDH correlates with Ki-67 expression. This could prove useful in identifying women with benign but high-risk breast pathologies who might benefit from chemoprophylaxis.
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Authors | Vassilios Papantoniou, Spyridon Tsiouris, John Koutsikos, Maria Sotiropoulou, Ekaterini Mainta, Dimitrios Lazaris, Pipitsa Valsamaki, Maria Melissinou, Cherry Zerva, Aris Antsaklis |
Journal | Nuclear medicine communications
(Nucl Med Commun)
Vol. 27
Issue 11
Pg. 911-7
(Nov 2006)
ISSN: 0143-3636 [Print] England |
PMID | 17021432
(Publication Type: Evaluation Study, Journal Article)
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Chemical References |
- Biomarkers, Tumor
- Ki-67 Antigen
- Radiopharmaceuticals
- Receptors, Estrogen
- Technetium Tc 99m Sestamibi
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Topics |
- Biomarkers, Tumor
(analysis)
- Breast Neoplasms
(diagnostic imaging, metabolism, pathology)
- Cell Proliferation
- Humans
- Hyperplasia
(diagnostic imaging, metabolism, pathology)
- Ki-67 Antigen
(analysis)
- Male
- Middle Aged
- Neoplasm Invasiveness
- Precancerous Conditions
(diagnostic imaging, metabolism, pathology)
- Radionuclide Imaging
- Radiopharmaceuticals
(pharmacokinetics)
- Receptors, Estrogen
(analysis)
- Retrospective Studies
- Risk Assessment
(methods)
- Risk Factors
- Technetium Tc 99m Sestamibi
(pharmacokinetics)
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