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Search Results: 1 - 10 of 8836 matches for " Zhanyong Bing "
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Obstructive Azoospermia in a Patient with VATER Association  [PDF]
Zhanyong Bing
Open Journal of Pathology (OJPathology) , 2012, DOI: 10.4236/ojpathology.2012.24030
Abstract: VATER association was first described in 1968 by Say and Gerald and is an association of congenital anomalies including V (vertebral defect), A (anal atresia), TE (tracheoesophegeal fistula), and R (radial dysplasia and renal defects). This report described a 26 year-old man with VATER association presented with infertility. Hormone tests including follicular stimulating hormone, luteinizing hormone and testosterone were normal. Semen analysis showed azoospermia. A testicular biopsy was performed and showed the presence of all of germinative components, germ cell sloughing, and mild hypospermatogenesis. The findings were compatible with obstructive azoospermia. No evidence of intratubular germ cell neoplasia unclassified was identified.
Gynecomastia: An Uncommon but Important Clinical Manifestation for Testicular Tumors  [PDF]
Zhanyong Bing, Shuting Bai
Open Journal of Pathology (OJPathology) , 2012, DOI: 10.4236/ojpathology.2012.21002
Abstract: Abstract: Gynecomastia is a benign enlargement of male breast tissue due to the proliferation of the ductal component. It can be physiological or pathological. Gynecomastia can be a sign for testicular tumors including sex-cord stromal tumors and germ cell tumors. Testicular physical examination in combination with testicular untrasonography and serum germ cell tumor markers when necessary in the presence of gynecomastia can help to reach a correct diagnosis.
Gain of Chromosomes 1, 2, 7, 10, 13 and 17 in an Acquired Cystic Kidney Disease Associated Renal Cell Carcinoma  [PDF]
Shuting Bai, Dengfeng Cao, Diane Robirds, Julie Branson, Zhanyong Bing
Open Journal of Pathology (OJPathology) , 2012, DOI: 10.4236/ojpathology.2012.21001
Abstract: The acquired cystic disease of the kidney-associated renal cell carcinoma (ACDK-RCC) in the current study occurred in a kidney with multiple cysts and was composed of cells with eosinophilic cytoplasm and prominent nucleoli. There were extensive calcium oxalate deposits in both non-neoplastic cysts and tumor. The tumor cells were positive for RCC Ma, CD10, and EMA, focally positive for CK7, negative for vimentin. Interphase in situ hybridizations (FISH) were performed for chromosome 1, 2, 7, 10, 13 and 17. No chromosomal abnormality was observed in the non-neoplastic cysts. Polysomies of chromosomes 1, 2, 7, 10, 13, 17 were observed in the tumor. Trisomy 13 was first reported in this type of tumor, which warranted further study.
Clear Cell Papillary Renal Cell Carcinoma in the Bilateral Native Kidneys after 2?Years of Renal Transplantation: Report of a Case and Review of the Literature
Zhanyong Bing,John E. Tomaszewski
Case Reports in Transplantation , 2011, DOI: 10.1155/2011/387645
Abstract: Renal transplantation increases the probability of malignant tumors by about 2–4-fold overall with a much higher rate for renal epithelial malignancy. Renal tumors in renal transplant recipients are commonly conventional clear cell or papillary renal cell carcinoma. Clear cell papillary renal cell carcinoma is a recently described unique renal epithelial neoplasm with scant eosinophilic or moderate amount of clear cytoplasm and pyknotic small nuclei oriented commonly toward the apical surfaces. No such tumor has been reported in renal transplant recipients. In this paper, we describe a clear cell papillary renal cell carcinoma involving bilateral native kidneys in a patient who had received a renal transplant 2 years earlier. Clear cell papillary renal cell carcinoma commonly presents with low pathologic stage and lower Fuhrman grade and is clinically indolent. Additional cases are needed to evaluate the clinical behavior of this type of tumor in renal transplant recipients.
Adult urinary bladder tumors with rabdomyosarcomatous differentiation: Clinical, pathological and immunohistochemical studies
Zhanyong Bing, Paul J Zhang
Diagnostic Pathology , 2011, DOI: 10.1186/1746-1596-6-66
Abstract: Rhabdomyosarcoma occurs much more commonly in children than in adults in genitourinary tract, in which more than 90% is embryonal, mostly botryoid type. Adult rhabdomyosarcoma is extremely rare [1-7]. Because of its rarity in adults, proper diagnosis and classification can be a challenge. To make this matter more complicated, rhabdomyoblastic differentiation is one of commonly seen heterologous elements in sarcomatoid carcinoma of urinary bladder [7]. Adult rhabdomyosarcoma of urinary bladder can have morphologic features overlapping with small cell carcinoma and poorly differentiated urothelial carcinoma with rhabdomyoblastic differentiation [7]. In this report, we reported three cases of primary rhabdomyosarcomatous tumor of the urinary bladder, two of them were diagnosed as carcinoma with extensive rhabdomyosarcomatous differentiation based on very minor carcinomatous elements identified and one as rhabdomyosarcoma without carcinomatous elements identified in the tissue examined. In addition, we compared the histologic and immunohistochemical features of these urinary bladder tumors with rhabdomyosarcomatous differentiation to that of well characterized bladder small cell carcinoma.The database of the Department of Pathology and Laboratory Medicine of the University of Pennsylvania was searched for bladder rhabdomyosarcoma, carcinoma with rhabdomyosarcomatous differentiation and small cell carcinoma for the period 1987-2010. One case of rhabdomyosarcoma and two cases of poorly differentiated urothelial carcinoma with extensive rhabdomyosarcomatous differentiation were identified, and the medical charts were reviewed and reported. In addition, 8 cases of pure bladder small cell carcinoma and 5 cases of poorly differentiated urothelial carcinoma with areas of small cell carcinoma were retrieved for the study. All specimens were fixed in a 10% neutral-buffered formalin solution and processed routinely. Histologic sections were reviewed and representative blocks of e
Adult type granulosa cell tumor in adult testis: report of a case and review of the literature
Zhao Song,David J. Vaughn,Zhanyong Bing
Rare Tumors , 2011, DOI: 10.4081/rt.2011.e37
Abstract: Granulosa cell tumors can be classified into juvenile and adult types and more commonly occur in ovaries. Adult testicular granulosa cell tumors are extremely rare and only 29 cases of adult type have previously been reported. We report here a 28-year-old Caucasian man with a left testicular adult type granulosa cell tumor. The tumor measured 2.6 x 2.6 x 2.5 cm and was mitotically active (10/10 HPF). Immunohistochemical stains showed the tumor diffusely positive for inhibin and vimentin, and negative for epithelial membrane antigen, cytokeratins, synaptophysin, HMB-45, OCT-4, placental-like alkaline phosphatase and lymphoid markers . The reported granulosa cell tumors in adult testis were briefly reviewed.
Malignant mesotheliomas in spermatic cords: reports of two cases and a brief review of literature
Xianmin Meng,Thomas J. Guzzo,Zhanyong Bing
Rare Tumors , 2013, DOI: 10.4081/rt.2013.e4
Abstract: Primary malignant mesothelioma (MM) of spermatic cord is extremely rare. We presented two malignant mesotheliomas involving the spermatic cords; one was primary, one secondary. The secondary one represented the direct involvement by a peritoneal MM. No occupational exposure to asbestos was identified in either patient. Both of them presented with a painless inguinal mass. Microscopically the primary MM was epithelioid type with tumor nests infiltrating adjacent adipose tissue, while the secondary MM grew in mixed type. No tumor necrosis was seen in the primary MM, while extensive necrosis was seen in the secondary one. Rare mitotic figure was seen in the primary MM while the mitosis in the secondary tumor was brisk, and with atypical mitosis. Immunohistochemically the tumor cells were positive for calretinin and CK5/6 and negative for BER-EP4 and BRST3 in both cases. The reported cases of primary MM from spermatic cord in English literature were briefly reviewed.
Glomus Tumor of the Kidney: A Case Report with CT, MRI, and Histopathological Findings  [PDF]
Jillian W. Lazor, Thomas J. Guzzo, Zhanyong Bing, Priti Lal, Parvati Ramchandani, Drew A. Torigian
Open Journal of Urology (OJU) , 2016, DOI: 10.4236/oju.2016.65015
Abstract: We describe the computed tomographic (CT) and magnetic resonance imaging (MRI) features of a very rare renal neoplasm, a glomus tumor. Our patient was a 68-year-old woman with a history of high grade T1 stage bladder cancer, status post intravesical Bacillus Calmette-Guérin (BCG) therapy and left ureteral stent placement, who presented for routine follow-up imaging evaluation of the urothelial tract. Computed tomographic urography (CTU) incidentally demonstrated a 1.7 cm well-circumscribed, non-calcified, non-fat containing lesion in the left renal cortex with arterial phase continuous peripheral rim enhancement and central hypoattenuation relative to enhanced renal parenchyma. Subsequent MRI showed the lesion to be isointense in signal intensity relative to the renal parenchyma on T1-weighted imaging and hyperintense on T2-weighted imaging. No macroscopic fat or microscopic lipid was seen within the lesion, and there were no foci of susceptibility artifact on T1-weighted images. Diffusion-weighted and apparent diffusion coefficient images demonstrated no restricted diffusion. Contrast-enhanced images demonstrated continuous peripheral rim enhancement in the arterial phase and persistent rim enhancement with partial centripetal fill in of enhancement on venous phase images, similar to the pattern seen on CT. Partial left nephrectomy was performed for the suspected solid renal neoplasm. Histopathological assessment was diagnostic of a renal glomus tumor.
A New Scheme for Discrete HJB Equations  [PDF]
Zhanyong Zou
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.517252
Abstract: In this paper we propose a relaxation scheme for solving discrete HJB equations based on scheme II [1] of Lions and Mercier. The convergence of the new scheme has been established. Numerical example shows that the scheme is efficient.
Localized Candidiasis in Kidney Presented as a Mass Mimicking Renal Cell Carcinoma
Zhao Song,Nicholas Papanicolaou,Stephanie Dean,Zhanyong Bing
Case Reports in Infectious Diseases , 2012, DOI: 10.1155/2012/953590
Abstract: Candida albicans is a ubiquitous fungus and infection of urinary tract by C. albicans can be originated from blood or retrograde infection. We reported a case of localized candidiasis in the kidney presenting as a mass. The patient was a 61-year-old male with a history of type 2 diabetes mellitus and urinary bladder urothelial carcinoma status post radical cystoprostatectomy with a neobladder three years ago. Pathology at that time also showed a prostatic adenocarcinoma (Gleason score 3
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