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Now showing items 1 - 16 of 128

  • Sarcoid-like granulomas in renal cell carcinoma: The Houston Methodist Hospital experience

    Komal Arora   Mukul K. Divatia   Luan Truong   Steven S. Shen   Alberto G. Ayala   Jae Y. Ro  

    Abstract Sarcoid-like (SL) granulomas have been previously described in association with malignant tumors. These granulomas appear to be tumor-related but are not indicative of systemic sarcoidosis, and hence are referred to as SL reactions. These SL reactions can be seen within the primary tumor, its vicinity, or in uninvolved sites such as the spleen, bone marrow, skin, and/or regional lymph nodes draining the tumor. It is a widely held view that SL granulomas are caused by soluble antigenic factors, shed by tumor cells or released due to tumor necrosis. SL reactions reported in Hodgkin lymphoma have been associated with a better prognosis. SL granulomas are thought to play an important role in the host's defenses against metastatic extension. SL granulomas have been reported in approximately 4.4% of carcinomas. Isolated cases of renal cell carcinoma (RCC) with SL granulomas have been reported with questionable prognostic significance. We identified 11 cases of RCCs with SL granulomas. Interestingly, all cases had abundant clear cell cytoplasm (10 clear cell RCC cases and 1 clear cell papillary RCC). We propose that this clear, abundant cytoplasm of the tumor cells with high content of glycogen and lipids may trigger granuloma formation akin to that seen in seminomas with SL granulomas. To date, this is the largest case series of RCCs with SL granulomas. Highlights • Sarcoid-like granulomas can be seen in renal cell carcinoma. • Prognostic significance of these SL granulomas is currently unknown. • High content of glycogen and lipid in tumor cells of clear cell RCCs might be the trigger.
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  • Primary collision tumors of the kidney composed of oncocytoma and papillary renal cell carcinoma: A review

    Zulfia McCroskey   Sue J. Sim   Andrew A. Selzman   Alberto G. Ayala   Jae Y. Ro  

    Abstract Background There are well known cases of hybrid tumors of chromophobe renal cell carcinoma (RCC) and oncocytoma in kidney, where both tumors have the same cell of origin – intercalated cell of the collecting duct. However, collision tumors composed of neoplasms originating from different cell lineages such as oncocytoma and papillary RCC are extremely rare. Herein, we made a collective literature review of reported cases of collision tumors composed of oncocytoma and papillary RCC, adding a case that we recently experienced. Material and methods A PubMed database was search for collision tumors of the kidney composed of oncocytoma and papillary RCC and a collective literature review was made. To this cohort, we also added a recently encountered case with similar, confirmed by immunohistochemistry, morphological features. Results To date 8 cases of a collision tumor composed of papillary RCC and oncocytoma have been described in the literature. All of them had a smaller papillary RCC component present within a larger oncocytoma. Conclusion Because of a few cases of such a collision tumors reported, it is difficult to make classification and right clinical management of these patients. None of the reported cases had tumor recurrence or progression on a follow-up. The presence of only small portion of papillary RCC in a large oncocytoma raises a possibility of under-sampling of malignant component in large oncocytomas in core biopsy or surgically resected specimens. We recommend better sampling, particularly at the periphery of otherwise classic oncocytomas to unveil this possible association. Highlights • In hybrid tumors of kidney composed of chromophobe renal cell carcinoma (RCC) and oncocytoma, both tumors have the same cell of origin – intercalated cell of the collecting duct. • However, observing collision tumors, tumors composed of cells of different lineages is extremely rare. • To date only 8 cases of a collision tumor composed of papillary RCC and oncocytoma have been described in the literature. • We made a collective literature review of collision tumors in the kidney composed of oncocytoma and papillary RCC, adding a case that we recently experienced. • We recommend generous sampling at the periphery of otherwise classic oncocytomas or papillary growth areas in oncocytomas to unveil this possible association.
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  • Small cell osteosarcoma. A clinicopathologic study of 27 cases

    Alberto G. Ayala   Jae Y. Ro   A. Kevin Raymond   Norman Jaffe   Sant Chawla   Humberto Carrasco   Michael Link   Jorge Jimenez   Jack Edeiken   Sidney Wallace   John A. Murray   Robert Benjamin  

    We report a study of 27 patients with small cell osteosarcoma (SCO), 17 from the M. D. Anderson Cancer Center (MDAH) and ten from the Pediatric Oncology Group (POG). There were 12 male patients and 15 female patients; 19 were white, five were black, and three were Hispanic. They ranged from 6 to 28 years of age with a median of 14 years. Histologically there were three patterns: Ewing's-like, lymphoma-like, and spindle cell. All cases showed osteoid formation and a few had chondroid areas. There was cytoplasmic glycogen in ten cases. Initial treatment for MDAH patients included intraarterial infusion of cisplatin in ten, amputation in four, partial mandibulectomies in two, and biopsy with local radiotherapy and systemic chemotherapy in one. All POG patients had resection or amputation followed by adjuvant chemotherapy. Twelve patients are alive, of whom nine have had significant follow-ups for 25 to 90 months. Fourteen patients are dead of lung, spine, and brain metastases from 1 to 23 months after initial diagnosis. One patient is alive with lung relapse at 4 months. In summary, SCO is a high-grade variant of osteosarcoma, with an incidence of up to 4% of all osteosarcomas, that affects patients of the same age group and has the same anatomic location as conventional osteosarcoma. Currently, SCO appears to have a prognosis that is the same as or slightly worse than that of conventional osteosarcoma. Furthermore, although intraarterial infusion is effective for the primary tumors in the bone, distant metastases are difficult to control.
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  • Mesenchymal hamartoma of the chest wall in infants and children: a clinicopathological study of five patients

    Alberto G. Ayala   Jae Y. Ro   Alvaro Bolio-Solis   F. Hernandez-Batres   Farzin Eftekhari   Jack Edeiken  

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  • The pathologist\"s role in the diagnosis and treatment of osteosarcoma in children

    Alberto G. Ayala   A. Kevin Raymond   Norman Jaffe  

    Tumor specimens from 24 children under 15 yr of age were studied. The children had osteosarcoma and received intra-arterial infusions of cis-platinum before resection or amputation. There were 13 boys and 11 girls, and the median age was 12 yr. Fifteen lesions were located in the femur 4 in the humerus, 3 in the tibia, 1 in the pubis and 1 in the radius. Sixteen patients underwent diagnostic needle biopsies and the remainder, open biopsies. Patients (11) had excellent tumor response, with > 90% tumor destruction in 6 and 65-75% in 5. One patient had 50% tumor destruction, and in 9 patients the response was insignificant. Two patientss had good clinical responses to treatment and refused limb amputation; 1 additional patient died of the disease without amputation or resection. The systematic study of pathology specimens is being undertaken to determine the utility of such a study as a guide to the selection of adjuvant chemotherapy. Patients in whom no responses are obtained should receive alternative treatment, and those in whom responses are optimal should retain the original agent in their adjuvant chemotherapy regimen.
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  • Renal collision tumor composed of oncocytoma and mucinous tubular and spindle cell carcinoma: case report of an unprecedented entity

    Komal Arora   Ross Miller   Seema Mullick   Steven Shen   Alberto G. Ayala   Jae Y. Ro  

    Summary Primary renal collision tumors composed of 2 histologically distinct components are rare with only isolated case reports in the medical literature. Oncocytoma is a benign renal neoplasm, which is thought to originate from distal tubular epithelial cells. Mucinous tubular and spindle cell carcinoma (MTSCC) of kidney is a rare, relatively recently described renal neoplasm that was first included in the 2004 World Health Organization renal cell carcinoma (RCC) classification as a distinct entity. Current studies suggest that the tumor originates from the proximal nephron, although it is still controversial. The presence of concurrent oncocytoma with conventional (clear cell) RCC, chromophobe RCC, and papillary RCC has been previously described. However, the association of oncocytoma with MTSCC has not yet been reported to our knowledge. Herein, we report the first case of a renal collision tumor composed of oncocytoma and MTSCC. Highlights • A collision tumor is coexistence of histologically distinct tumors in the same site. • The first case of renal collision tumor of oncocytoma and mucinous tubular and spindle cell carcinoma is reported. • Oncocytoma is benign, and mucinous tubular and spindle cell carcinoma is a malignant neoplasm with indolent behavior.
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  • Alberto G Musalem: US macroeconomic and regulatory developments and emerging market economies

    Alberto G Musalem  

    The U. S. economy and financial system have strengthened notably in recent years and in a mutually reinforcing way. U. S. monetary and regulatory policy both need to be tailored to domestic conditions. The Fed is also mindful of the international effects of its policies, given the central place of the U. S. in the global financial system, and the potential for spillbacks to the U. S. economy and financial system. Effective communication with market participants and policymakers is important. The opportunity for dialogue is what makes conferences such as this one valuable.
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  • Looking for Money: Capitalism and Modernity in an Orang Asli Villageby Alberto G. Gomes

    Review by: Patricia Sloane-White  

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  • Looking for Money: Capitalism and Modernity in an Orang Asli Villageby Alberto G. Gomes

    Review by: Patricia Sloane-White  

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  • Migration and Mobility || Modernity and Malaysia: Settling the Menraq Forest Nomadsby Alberto G. Gomes

    Review by: Tim Bunnell  

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  • Migration and Mobility || Modernity and Malaysia: Settling the Menraq Forest Nomadsby Alberto G. Gomes

    Review by: Tim Bunnell  

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  • H. G. Wells en Espa?a: Estudio de los expedientes de censura (1939-1978)by Alberto Lázaro

    Review by: Daniel Leuenberger  

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  • H. G. Wells en España: Estudio de los expedientes de censura (1939-1978)by Alberto Lázaro

    Review by: Daniel Leuenberger  

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  • Al pie de la Casa Blanca: Poetas hispanos de Washington, DCby Luis Alberto Ambroggio; Carlos Parada Ayala

    Review by: Peggy Hale Bilbro  

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  • Al pie de la Casa Blanca: Poetas hispanos de Washington, DCby Luis Alberto Ambroggio; Carlos Parada Ayala

    Review by: Peggy Hale Bilbro  

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  • Carlos D. Garcia, Agustin G. Crevillén, Alberto Escarpa (Eds): Carbon-based nanomaterials in analytical chemistry

    Blanco-López, Maria Carmen  

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