We present a case of 55-year-old man who complained of dyspnea and sputum for a month. He was an ex-smoker with a history of prostate cancer and pulmonary tuberculosis. Chest radiographs revealed bilateral pleural effusions of a small to moderate amount. Pigtail catheters were inserted for drainage. The pleural fluid consisted of large clusters and tightly cohesive groups of malignant cells, which however could not be ascribed to prostate cancer with certainty. We performed immunocytochemical panel studies to determine the origin of cancer metastasis. The immunostaining results were positive for prostate-specific antigen, alpha-methylacyl-coenzyme A racemase, and Nkx 3.1, consistent with prostate cancer. Pleural effusion associated with prostate cancer is rare. To our knowledge, this is the first case report in Korea to describe cytologic features of malignant pleural effusion associated with prostate cancer.
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Background Ductal adenocarcinoma (DAC) of the prostate is an uncommon histologic subtype whose prognostic factors and immunoprofile have not been fully defined. Methods: To define its prognostic factors and immunoprofile, the clinicopathological features, including biochemical recurrence (BCR), of 61 cases of DAC were analyzed. Immunohistochemistry was performed on tissue microarray constructs to assess the expression of prostate cancer-related and mammalian target of rapamycin (mTOR) signaling-related proteins. Results: During the median follow-up period of 19.3 months, BCR occurred in 26 cases (42.6%). DAC demonstrated a wide expression range of prostate cancer-related proteins, including nine cases (14.8%) that were totally negative for pan-cytokeratin (PanCK) immunostaining. The mTOR signaling-related proteins also showed diverse expression. On univariate analysis, BCR was associated with high preoperative serum levels of prostate-specific antigen (PSA), large tumor volume, predominant ductal component, high Gleason score (GS), comedo-necrosis, high tumor stage (pT), lymphovascular invasion, and positive surgical margin. High expressions of phospho-mTOR (p-mTOR) as well as low expressions of PSA, phospho-S6 ribosomal protein (pS6) and PanCK were associated with BCR. On multivariable analysis, GS, pT, and immunohistochemical expressions of PanCK and p-mTOR remained independent prognostic factors for BCR. Conclusions: These results suggest GS, pT, and immunohistochemical expressions of PanCK and p-mTOR as independent prognostic factors for BCR in DAC. Since DAC showed diverse expression of prostate cancer–related proteins, this should be recognized in interpreting the immunoprofile of DAC. The diverse expression of mTOR-related proteins implicates their potential utility as predictive markers for mTOR targeted therapy.
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BACKGROUND Prostate adenocarcinoma (PACa) cells are rarely identified in urine cytology specimens and might be easily overlooked or misdiagnosed as urothelial neoplasm when clinically unsuspected. METHODS We reviewed 19 urine cytology specimens obtained from 13 patients with PACa and evaluated the characteristic features discriminating PACa from urothelial carcinoma (UCa). For comparison, 27 cases of high-grade UCa (HGUCa) and 10 cases of urothelial carcinoma in situ (UCis) were also evaluated. RESULTS The urine cytologic evaluation of PACa revealed clustered cells forming 3-dimensional syncytial fragments with occasional microacinar grouping in a clean background.
Most tumor cells were small and uniform with a high nuclear-to-cytoplasmic ratio and indistinct cell borders.
The nuclei were round-to-oval and the cytoplasm was scanty and thin. One or more centrally-located prominent nucleoli were characteristically noted in one half of the cases. The nucleoli had a well-defined, large, round and eosinophilic appearance. In four high-grade cases, large tumor cells were encountered and had relatively monotonous cells with smooth-outlined cell clusters, well-defined and thin cytoplasm, and round nuclei with characteristic prominent nucleoli. CONCLUSIONS Combining the information of prostate cancer and the recognition of cytomorphologic features of PACa will help differentiate PACa from HGUCa and UCis.
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The diagnostic challenge of suspicious or positive malignant urine cytology findings when cystoscopy findings are normal: an outpatient blue-light flexible cystoscopy may solve the problem Marie Andersson, Marthe Berger, Karsten Zieger, Per-Uno Malmström, Mats Bläckberg Scandinavian Journal of Urology.2021; 55(4): 263. CrossRef
Sensitive Time-Gated Immunoluminescence Detection of Prostate Cancer Cells Using a TEGylated Europium Ligand Nima Sayyadi, Irene Justiniano, Russell E. Connally, Run Zhang, Bingyang Shi, Liisa Kautto, Arun V. Everest-Dass, Jingli Yuan, Bradley J. Walsh, Dayong Jin, Robert D. Willows, James A. Piper, Nicolle H. Packer Analytical Chemistry.2016; 88(19): 9564. CrossRef
BACKGROUND At present, adequate prognostic markers for prostate cancer progression are still lacking, in spite of intensive investigation. Accordingly, our study examined the relationship between expression of candidate biomarkers and metastasis in prostate cancer patients. Correlation of molecular markers with prostate-specific antigen (PSA) level, Gleason sum score and tumor stage were also evaluated. METHODS A total of 105 prostate tumor specimens and specimens from 19 cases of nodular hyperplasia were obtained through Yeungnam University Hospital from 2007 to 2008.
Immunohistochemical analyses for p16INK4a, phosphatase and tensin homolog (PTEN), E-cadherin, Ki-67 and Bcl-2 were performed. RESULTS Overexpression of Bcl-2 was significantly related to bone (p = 0.006) and nodal metastases (p = 0.017). Other biomarkers were not related to metastatic potential. There were statistically significant relationships between increased PSA level and loss of expression of PTEN (p = 0.019) and E-cadherin (p = 0.001). High Ki-67 index was significantly correlated with nodal metastasis (p = 0.029) as well as with loss of p16INK4a expression (p = 0.002) and high Gleason score (p = 0.011). CONCLUSIONS High Gleason score, Bcl-2 overexpression and increased Ki-67 labeling have significant predictive value in assessing the potential for prostate cancer metastasis.
In addition, a high Ki-67 index is related to high Gleason score and loss of p16INK4a expression.
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Over-expression of β-catenin is associated with high grade of prostatic cancer in Libyan patients W. Said, F. Emaetig, K. El Gehani, T. Eldarat, A. Buhmeida, N. Enattah, A. Elzagheid, O. Al-Fituri African Journal of Urology.2017; 23(2): 133. CrossRef
Bcl2 en cáncer avanzado de próstata y asociación con resistencia a la castración R.F. Velázquez-Macías, F.E. De La Torre-Rendón, G. Ramos-Rodríguez, C.A. Calzada-Mendoza, R.M. Coral-Vázquez Revista Mexicana de Urología.2016; 76(5): 288. CrossRef
Hedgehog signaling protein expression and its association with prognostic parameters in prostate cancer: A retrospective study from the view point of new 2010 anatomic stage/prognostic groups Tae‐Jung Kim, Ji Youl Lee, Tae‐Kon Hwang, Chang Suk Kang, Yeong‐Jin Choi Journal of Surgical Oncology.2011; 104(5): 472. CrossRef
BACKGROUND We developed a new processing method for extended prostate needle biopsy, and evaluated diagnostic utility of routine immunohistochemistry in 1,000 consecutive unselected cases of transrectal ultrasound-guided systematic prostate biopsy. METHODS Four to five biopsy cores were embedded in one paraffin block. All the biopsy cores were immunohistochemically stained with basal cell markers. RESULTS The new sample processing method was technically perfect for making a diagnosis from extended prostate needle biopsy. Among 1,000 cases, there were 323 cases (32.3%) of adenocarcinoma, 5 cases of other malignant tumors, 9 cases of high-grade prostatic intraepithelial neoplasia without a carcinoma, and only 8 cases of atypical small acinar proliferation. Among the 323 cases of adenocarcinoma, there were 38 cases (11.8%) of microcarcinomas <0.1 cm and 101 cases (31.3%) of small adenocarcinomas <0.3 cm in length. In the needle biopsy specimens, 59 cases (18.3%) were classified as clinically insignificant carcinomas. Among them, 37 cases underwent radical prostatectomy, which turned out to be clinically significant carcinomas in 24 cases (64.9%). CONCLUSIONS Routinely performed immunohistochemistry combined with the new sample processing method is very effective for detecting microscopic carcinoma foci as well as differentiating carcinoma from benign conditions mimicking cancer.