Computer extracted gland features from H&E predicts prostate cancer recurrence comparably to a genomic companion diagnostic test: a large multi-site study

Existing tools for post-radical prostatectomy (RP) prostate cancer biochemical recurrence (BCR) prognosis rely on human pathologist-derived parameters such as tumor grade, with the resulting inter-reviewer variability. Genomic companion diagnostic tests such as Decipher tend to be tissue destructive, expensive, and not routinely available in most centers. We present a tissue non-destructive method for automated BCR prognosis, termed "Histotyping", that employs computational image analysis of morphologic patterns of prostate tissue from a single, routinely acquired hematoxylin and eosin slide. Patients from two institutions (n = 214) were used to train Histotyping for identifying high-risk patients based on six features of glandular morphology extracted from RP specimens. Histotyping was validated for post-RP BCR prognosis on a separate set of n = 675 patients from five institutions and compared against Decipher on n = 167 patients. Histotyping was prognostic of BCR in the validation set (p < 0.001, univariable hazard ratio [HR] = 2.83, 95% confidence interval [CI]: 2.03-3.93, concordance index [c-index] = 0.68, median years-to-BCR: 1.7). Histotyping was also prognostic in clinically stratified subsets, such as patients with Gleason grade group 3 (HR = 4.09) and negative surgical margins (HR = 3.26). Histotyping was prognostic independent of grade group, margin status, pathological stage, and preoperative prostate-specific antigen (PSA) (multivariable p < 0.001, HR = 2.09, 95% CI: 1.40-3.10, n = 648). The combination of Histotyping, grade group, and preoperative PSA outperformed Decipher (c-index = 0.75 vs. 0.70, n = 167). These results suggest that a prognostic classifier for prostate cancer based on digital images could serve as an alternative or complement to molecular-based companion diagnostic tests

Urology in Syria: A View From Inside

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The Dilemma of Multiculturalism and Multinationalism in Medical Practice

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Partial nephrectomy for metastatic renal cell carcinoma: Where do we stand?

Nephron-sparing surgery (NSS) for renal cell carcinoma (RCC) offers comparable oncologic results, but a lower risk of chronic kidney disease, when compared with radical nephrectomy. However, there are limited data in the literature examining the safety of NSS in the setting of metastatic RCC. To evaluate the feasibility of NSS and impact on cancer-specific survival (CSS) in patients with metastatic disease, we performed a systematic review of the literature. There is ample evidence that NSS is feasible in metastatic RCC, with comparable results in terms of CSS compared with radical cytoreductive nephrectomy

Laparoscopic treatment of giant renal cystic echinococcosis

Hydatid disease is a parasitic infestation caused by the larval form of the cestode Echinococcus granulosus. Isolated renal involvement is quite rare. Surgery is the mainstay of treatment and is classically performed through an open approach with kidney-sparing when feasible. The case of a 33-year-old male patient who underwent laparoscopic unroofing of a giant renal hydatid cyst is described herein