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Temperature differences are associated with malignancy on lung lesions: a clinical study.
Christodoulos Stefanadis1, Christina Chrysohoou, Demosthenes B Panagiotakos
1Hippokration Hospital, School of Medicine, University of Athens, Athens, Greece. cstefan@cc.uoa.gr
BMC Cancer
|January 8, 2003
Summary
Thermal imaging can help diagnose lung lesions. A temperature difference (DeltaT) greater than 1.05°C between a lesion and normal tissue significantly increases the likelihood of malignancy, aiding in early detection.
Area of Science:
- Pulmonary Medicine
- Medical Imaging
- Oncology
Background:
- Current endoscopic techniques for detecting lung lesions rely heavily on subjective visual assessment.
- There is a need for objective markers to complement visual inspection in diagnosing lung lesions.
Purpose of the Study:
- To evaluate thermal heterogeneity in bronchial epithelium as an additional diagnostic marker for benign versus malignant lung lesions.
- To determine if temperature differences can differentiate between cancerous and non-cancerous lung tumors.
Main Methods:
- A novel thermography catheter, inserted via fiber optic bronchoscope's biopsy channel, was used to measure in vivo temperature in human pulmonary epithelium.
- Temperature differences (DeltaT) were calculated between 22 lung lesions (in 20 subjects aged 50-65) and adjacent normal bronchial epithelium.
Main Results:
- Significant differences in DeltaT were observed between benign (0.71 ± 0.6°C) and malignant (1.23 ± 0.4°C) tumors (p < 0.05).
- Logistic regression indicated that a 1°C DeltaT increased malignancy probability six-fold (odds ratio = 6.18).
- A DeltaT threshold of 1.05°C demonstrated 64% sensitivity and 91% specificity for malignancy detection.
Conclusions:
- Calculated DeltaT between normal tissue and neoplastic lung lesions shows promise as a diagnostic criterion for malignancy.
- Thermal heterogeneity measured by this technique could serve as an objective biomarker in lung cancer diagnosis.