Résumé
PURPOSE: To investigate the effectiveness of low-level laser therapy (LLLT) on gastrocnemius muscle morphology and Myod imunoexpression in a model of dorsal burn in rats. METHODS: Sixteen male Wistar rats were distributed into two groups: control group (CG): rats submitted to scald burn injury without treatment and laser treated group (LG): rats submitted to scald burn injury and treated with laser therapy. Fourteen days post-surgery, gastrocnemius muscle was evaluated being the specimens stained with HE and morphometric data was evaluated. MyoD expression was assessed by immunohistochemistry. RESULTS: The results showed that laser treated animals presented more organized tissue morphology compared to the non-treated animals, with a higher number of nucleus in the fibers. Also, the cross sectional area of the fibers and the MyoD immunoexpression in the laser treated groups was higher. CONCLUSION: Low-level laser therapy had positive effects on gastrocnemius muscle, improving tissue muscle morphology, increasing cross sectional area and MyoD immunoexpression. .
Sujets)
Animaux , Mâle , Brûlures/radiothérapie , Photothérapie de faible intensité/méthodes , Muscles squelettiques/effets des radiations , Protéine MyoD/analyse , Brûlures/métabolisme , Brûlures/anatomopathologie , Numération cellulaire , Modèles animaux de maladie humaine , Immunohistochimie , Fibres musculaires squelettiques/effets des radiations , Muscles squelettiques/anatomopathologie , Protéine MyoD/effets des radiations , Rat Wistar , Reproductibilité des résultats , Peau/traumatismes , Peau/effets des radiations , Facteurs temps , Résultat thérapeutiqueRésumé
Embryonal rhabdomyosarcoma is the most common soft tissue sarcoma in children. We report a rare case of embryonal rhabdomyosarcoma of the soft palate in a 32-year-old Caucasian female. Detailed histology of the tumor is described. Positive staining with desmin, myogenin and myoD1 confirmed the tumor to be embryonal rhabdomyosarcoma. A genetic association between rhabdomyosarcoma, polycystic ovary syndrome and the FEM1A gene on the human chromosome is speculated upon.
Sujets)
Adulte , Desmine/analyse , , Femelle , Tête/imagerie diagnostique , Histocytochimie , Humains , Immunohistochimie , Imagerie par résonance magnétique , Microscopie , Tumeurs de la bouche/diagnostic , Tumeurs de la bouche/anatomopathologie , Protéine MyoD/analyse , Myogénine/analyse , Palais mou/anatomopathologie , Rhabdomyosarcome embryonnaire/diagnostic , Rhabdomyosarcome embryonnaire/anatomopathologieRésumé
Non-hematopoietic malignancies infiltrating bone marrow have always been a source of erroneous diagnosis. Among these, the small round cell tumors like neuroblastomas and rhabdomyosarcomas mimick the hematopoietic blasts. Several case reports of rhabdomyosarcoma mimicking acute leukemia, clinically and morphologically at presentation have been reported in the literature. To the best of our knowledge such an entity has not been reported in Indian literature. We report here one such case of alveolar rhabdomyosarcoma masquerading as acute leukemia. A thorough clinical examination with high degree of suspicion on bone marrow morphology and judicious use of appropriate immunohistochemistry markers will solve many of these cases.