The authors report a case of chondrosarcoma in a 14-year-old female patient with multiple osteochondromatosis who has sought medical assistance complaining of a tumor on the left coxa. CT images of the affected limb have demonstrated osteodestructive lesion on the superior third of the left femur. The diagnosis has been made through a review of the biopsy slide from the service of origin of the patient, confirming the finding of a grade I chondrosarcoma in a chondromatous lesion. Disarticulation of the femoral neck was made because of the large extent of the lesion in muscular groups, subcutaneous cellular tissue and skin. The literature shows a wide variation in rates of malignant transformation of exostosis in patients with this disease, and this is a significant complication in patients affected by this disease.

Keywords: Chondrosarcoma, Multiple osteochondromatosis, Computed tomography, Femur

We reviewed the case notes and computed tomography scans of 22 patients with squamous cell carcinoma of the vocal cord, in the period between 1992 and 1998. Interobserver concordance for all cases and accuracy and concordance between the methods for the operated patients were evaluated using the kappa test. Concordance was classified as follows: excellent for evaluating tumoral involvement of the thyroid and cricoid cartilages, extralaryngeal extension and lymph node staging; very good for tumoral involvement of vocal cords, posterior commissure and paraglottic space; good for tumoral involvement of the supraglottic and subglottic regions and tumoral staging; regular for tumoral involvement of the anterior commissure and arytenoid cartilage. The combination of clinical and computed tomography evaluation for T staging resulted in an accuracy and concordance with the pathological results of 89.47% and 84.9%, respectively, which were superior to isolated clinical or computed tomography analysis. The accuracy and pathological concordance of computed tomography for N staging was 100%, which was superior to clinical evaluation.

Keywords: Squamous cell carcinoma. Vocal cord. Computed tomography.