[Primary mesenchymal chondrosarcoma of the mediastinum]. / Condrosarcoma mesenquimal primario en el mediastino.

Cartilaginous lesions of the mediastinum are quite rare and primary cartilage forming tumors arising within the mediastinum are even more exceptional. Radiologic findings are unspecific. However, certain characteristics can orient the diagnosis. They are presented one mediastinal chondrosarcoma case in adult patient of patho-anatomical diagnosis. The findings described entail chest radiography, computed tomography and magnetic resonance.

Condrosarcoma mesenquimal primario en el mediastino / Primary mesenchymal chondrosarcoma of the mediastinum

Las lesiones cartilaginosas en el mediastino son muy infrecuentes y los tumores primarios formadores de cartílago que asientan en el mediastino son incluso más excepcionales. Los hallazgos radiológicos a menudo son inespecíficos. No obstante, existen ciertas características que nos pueden orientar hacia el diagnóstico.Presentamos un caso de condrosarcoma mediastínico en un paciente adulto cuyo diagnóstico se realizó por anatomía patológica. Describimos los hallazgos en la radiografía de tórax, tomografía computarizada y resonancia magnética

Cartilaginous lesions of the mediastinum are quite rare and primary cartilage forming tumors arising within the mediastinum are even more excepcional. Radiologic findings are unspecific. However, certain characteristicscan orient the diagnosis.They are presented one mediastinal chondrosarcoma case in adult patient of patho-anatomical diagnosis. The findings described entail chest radiography, computed tomography and magnetic resonance

[Local staging with CT of tumors of the upper urothelium]. / Estadiaje local mediante TC de los tumores del urotelio superior.

OBJECTIVE: To evaluate the ability of computerized tomography (CT) to stage transitional cell carcinoma of the upper urinary tract. METHODS: 29 transitional cell carcinoma of the upper urinary tract submitted to nephroureterectomy were retrospectively evaluated. All 29 tumors had preoperative CT scans performed to stage the lesion. The pathological staging was compared to that of CT. RESULTS: 10 of the 29 tumors had CT evidence of tumor extension and 19 had localized noninvasive tumor on CT. Of the 10 patients with CT findings of tumor extension, 2 (20%) had superficial tumors and 8 (80%) had tumors that invaded into the adventitial fat, renal parenchyma or perirenal fat (pT3, pT4). Of the 19 patients with localized noninvasive tumor on CT, 13 (68%) had superficial tumors and 6 (32%) had pT3 or pT4 tumors. CT sensitivity for tumor invasion was 57% with a specificity of 87.5%. CONCLUSIONS: Our analysis shows that CT is of limited value in staging these tumors. When CT demonstrates direct tumor extension through the renal pelvic or ureteral wall, it is a sensitive indicator of high-stage tumor. However, the results obtained in low stage tumors must be viewed with caution.

[Retroperitoneal tumor arising from neural crest: ganglioneuroma+]. / Tumor retroperitoneal derivado de la cresta neural: ganglioneroma.

OBJECTIVES: This study shows the contribution of the different imaging methods in the diagnosis of retroperitoneal ganglineuroma. METHODS: A retroperitoneal mass was incidentally detected in a young male patient. Patient evaluation included plain abdominal radiography, intravenous urography, ultrasound and computed tomography. RESULTS: Ultrasound and computed tomography provide information on tumor characteristics and extent, although it has no diagnostic specifity and does not permit distinguishing ganglioneuroma from other neural crest tumors.