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Tumor calcification after radiotherapy demonstrated by computed tomography
The Journal of Computed Tomography
|September 1, 1980
Summary
Radiotherapy can cause tumor ossification or calcification, detectable by computed tomography (CT) and sometimes plain films. While indicative of resolution in carcinomas, these changes signal recurrence in lymphoma cases.
Area of Science:
- Radiology
- Oncology
- Medical Imaging
Background:
- Post-radiotherapy changes in tumors require accurate detection and interpretation.
- Computed tomography (CT) and plain film radiography are key imaging modalities.
Observation:
- Three cases demonstrated tumor ossification or calcification following radiotherapy.
- Abdominal and pelvic tumors showed changes on both CT and plain films.
- Nasopharyngeal tumors only revealed calcification via CT.
Findings:
- Ossification/calcification indicated tumor resolution in two carcinoma cases.
- In a lymphoma case, these changes correlated with rapid adjacent tissue recurrence.
Implications:
- CT is crucial for detecting subtle calcifications, especially in the nasopharynx.
- Interpreting post-radiotherapy ossification/calcification requires considering tumor histology (carcinoma vs. lymphoma).
- Imaging findings can guide prognosis and treatment decisions.