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El angiomixoma agresivo es una neoplasia pocofrecuente, que suele afectar a la región perineal ypelvis, con capacidad infiltrativa local y frecuentesrecurrencias; el tratamiento de elección es laexéresis quirúrgica completa.Presentamos un caso de angiomixoma agresivolocalizado en región pelviperineal, realizando unarevisión de las características clinicopatológicas y elmanejo de estos pacientes.Es importante considerar el diagnóstico deangiomixoma agresivo en pacientes con masa enregión perineopélvica

Aggressive angiomyxoma is a rare tumor thatusually involves the pelvic and perineal regions.These locally infiltrative tumors are associated with a high recurrence rate. The treatment of choiceis radical surgical excision.We report a case of aggressive angiomyxoma ofthe female pelvis and perineum and review theclinical and pathologic characteristics of this entity,as well as the management of these patients.Any perineal-pelvic tumor should be evaluatedas a potentially aggressive angiomyxoma

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OBJECTIVE: Metanephric adenoma is an unfrequent renal neoplasm, usually asymptomatic. Differential diagnosis with other renal tumors has to be performed. METHODS/RESULTS: We report the case of a 67 years old woman with a metanephric adenoma. CONCLUSIONS: Metanephric tumors comprise a pathologic spectrum of lesions. At one end of the pathologic spectrum are the metanephric adenomas. These tumors usually behave in a benign fashion. It is important to differentiate metanephric adenoma from clinically aggressive renal tumors.

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OBJETIVO: El carcinosarcoma se caracteriza por ser un tumor con componente epitelial y mesenquimal maligno. Se trata de una neoplasia poco frecuente en la vía urinaria y su localización en uréter es excepcional. MÉTODOS/RESULTADOS: Describimos un caso de carcinosarcoma de uréter en un paciente de 69 años de edad al que se le practica tumorectomía con resección ureteral. CONCLUSIÓN: Los carcinosarcomas son tumores malignos con mal pronóstico, probablemente por ser lesiones diagnosticadas en estadio avanzado (AU)

OBJECTIVE: Carcinosarcoma is a neoplasia with malignant epithelial and mesenchymal differentiation. Carcinosarcoma of the urinary tract is a rare neoplasm. It is an extremely rare entity in the ureter. METHODS/RESULTS: We report one case of carcinosarcoma arising from the ureter in a 69-year-old male patient who underwent total ureterectomy. CONCLUSION: Carcinosarcomais a malignant neoplasia associated with poor prognosis, probably resulting from the advanced stage at diagnosis (AU)

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Objetivo: El adenoma metanéfrico es una neoplasia renal poco frecuente, usualmente asintomática, que plantea el diagnóstico diferencial con otros tumores renales más frecuentes. Métodos y resultados: Presentamos un caso de adenoma metanéfrico en una mujer de 67 años de edad. Conclusiones: Los tumores metanéfricos comprenden un amplio espectro de lesiones, encontrándose en uno de sus extremos el adenoma metanéfrico. Se trata de un tumor de comportamiento usualmente benigno, que plantea el diagnostico diferencial con tumores renales malignos (AU)

Objective: Metanephric adenoma is an unfrequent renal neoplasm, usually asymptomatic. Differential diagnosis with other renal tumors has to be performed. Methods/results: We report the case of a 67 years old woman with a metanephric adenoma. Conclusions: Metanephric tumors comprise a pathologic spectrum of lesions. At one end of the pathologic spectrum are the metanephric adenomas. These tumors usually behave in a benign fashion. It is important to differentiate metanephric adenoma from clinically aggressive renal tumors (AU)

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OBJECTIVE: Carcinosarcoma is a neoplasia with malignant epithelial and mesenchymal differentiation. Carcinosarcoma of the urinary tract is a rare neoplasm. It is an extremely rare entity in the ureter. METHODS/RESULTS: We report one case of carcinosarcoma arising from the ureter in a 69-year-old male patient who underwent total ureterectomy. CONCLUSION: Carcinosarcomais a malignant neoplasia associated with poor prognosis, probably resulting from the advanced stage at diagnosis.

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OBJECTIVE: Persistence of a patent urachus is a relatively rare occurrence; however; the persistence of urachal remnants is common. The pathologic lesions of the urachus include benign and malignant neoplasms. The majority of malignant urachal neoplasms are adenocarcinomas. METHODS AND RESULTS: We report a case of papillary urothelial carcinoma of urachus in a 73-year-old woman. The patient was treated with complete surgical extirpation and partial cystectomy. CONCLUSION: The recognition of urachal remnants as vestigial structures and pathologic lesions of the urachus is important.

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OBJETIVOS: La persistencia del uraco en el adulto es relativamente rara, siendo frecuente la presistencia de remanentes. Sobre él pueden desarrollarse diversos procesos patológicos, incluyendo neoplasias benignas y malignas, siendo la mas frecuente el adenocarcinoma. MÉTODOS Y RESULTADOS: Describimos un caso de carcinoma papilar urotelial de uraco en una paciente de 73 años de edad a la que se le practica tumorectomía y cistectomía parcial. CONCLUSIONES: Es importante el reconocimiento del uraco como estructura vestigial, así como el conocimiento de las lesiones desarrolladas sobre él

OBJECTIVE: Persistence of a patent urachus is a relatively rare occurrence; however; the persistence of urachal remnants is common. The pathologic lesions of the urachus include benign and malignant neoplasms. The majority of malignant urachal neoplasms are adenocarcinomas. METHODS AND RESULTS: We report a case of papillary urothelial carcinoma of urachus in a 73-year-old woman. The patient was treated with complete surgical extirpation and partial cystectomy. COCLUSION: The recognition of urachal remnants as vestigial structures and pathologic lesions of the urachus is important

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Introducción: El tumor estromal esclerosante es una neoplasia benigna que representa el 2-6% de los tumores estromales ováricos, y el 80% se presenta en mujeres entre la segunda y tercera décadas de la vida. Suelen ser tumores sólidos con áreas de edema y pequeñas zonas quísticas y un patrón histológico característico. Descripción del caso: Presentamos un caso de tumor estromal esclerosante totalmente quístico en una paciente de 53 años de edad, planteándose el diagnóstico diferencial con otras lesiones quísticas ováricas. Conclusión: El tumor esclerosante ovárico es un tumor benigno que puede plantear el diagnóstico diferencial tanto con lesiones ováricas sólidas como quísticas

Introduction: Sclerosing stromal tumor is a benign neoplasm representing 2-6% of ovarian stromal tumors. Eighty percent of these tumors appear in women in the second and third decades of life. These neoplasms are usually macroscopically solid tumors with small edematous and cystic areas and show characteristic histological features. Case report: We report a case of sclerosing cystic stromal tumor of the ovary in a 53-year-old woman and discuss its differential diagnosis with other solid and cystic ovarian neoplasms. Conclusion: Sclerosing ovarian tumor is a benign entity that may pose problems of differential diagnosis with other solid and cystic tumors

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OBJECTIVE: Prostatic tumors are the most frequent malignant neoplasms in men, most of them being constituted by carcinomas; only 0.2% of malignant prostatic neoplasms are of mesenchimal origin. They are not well known, especially those of prostatic stromal phenotype. METHODS AND RESULTS: We report the case of a 20 year-old man with a prostatic stromal sarcoma. After total cystoprostatectomy a tumor measuring 8 cm could be seen, replacing almost the whole prostate. Microscopically a spindle cell neoplasia with moderate atypia and a high mitotic index entrapping few elongated prostatic ducts (adopting a phyllodes tumor morphology) was observed. CONCLUSION: The clinical behavior of these infrequent sarcomas is not well-established. Recurrences are not uncommon whereas lung and bone metastases have been described. Twelve months after surgery our patient is alive without evidence of disease.

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