http://springerlink.metapress.com/link. ... 5qcmgya0fk
The abstract at the above link says
Tracer-avid osseous lesions are usually considered to represent metastases in pediatric oncology patients. However, sites of minor, clinically occult, skeletal trauma may be mistaken for osseous metastases. Objective. The objective of this study was to review our experience with skeletal scintigraphy in pediatric oncology patients to determine specificity for metastatic disease.
The abscract concludes:
Of the 45 patients with abnormal scintigraphy, 16 (35 %) had metastases and 29 (65 %) had one or more focal benign lesions. These lesions included abnormalities due to stress/trauma (25), benign neoplasm (2), infection (3), disuse (6), surgery (10) and artifacts (4). Conclusion. The majority of scintigraphic abnormalities have nonmalignant etiologies, most commonly stress reaction and trauma. In patients without known extraosseous metastases, one or two skeletal lesions should not be assumed to represent metastatic disease.
Authors: Patricia A. Lowry and M. Cristie Carstens
So osteosarcoma seems to be primarily a pediatric concern and trauma is generally thought to be unrelated to malignant cancer but is correlated to benign growths aka "focal benign lesions." So hard conditioning can give you bumps but generally they are bumps that won't grow. Sound about right Doctor type folks?
BTW - while a little knowledge can
be a dangerous thing http://scholar.google.com/
is a wonderful way to get some peer-reviewed info.