This is a histopathology slide of prostatic tissue obtained from transurethral resection of the prostate (TURP). Imaging modality: light microscopy; staining: hematoxylin and eosin. The specimen demonstrates nodular stromal hyperplasia composed of irregularly sized acini intimately admixed with dense fibromuscular stroma. The nodules display papillary infolding and variable gland size, a hallmark of nodular prostatic hyperplasia (benign prostatic hyperplasia, BPH). The glandular epithelium is typically cuboidal to columnar without significant cytologic atypia; stromal cells are fibromuscular and nonmalignant. Overall architecture is nodular with coarse borders and occasional dilated acini, consistent with benign prostatic tissue arranged in nodules rather than a uniform adenocarcinoma. No malignant features are identified: mitotic activity is not increased, and there is no prominent necrosis or invasion. In TURP specimens, the diagnostic focus rests on obstructive voiding symptoms and clinical presentation rather than morphologic abnormalities. The findings correlate with lower urinary tract symptoms due to prostatic enlargement and bladder outlet obstruction; they support a benign etiology for LUTS and guide management toward medical therapy or TURP as required. Important differentials include prostatic adenocarcinoma, prostatitis, and atrophy; however, absence of invasion or significant atypia favors benign nodular hyperplasia. Correlation with clinical history and imaging enhances diagnostic confidence overall.

This histopathology slide depicts a formalin-fixed, paraffin-embedded prostatic needle biopsy specimen subjected to immunohistochemical staining. The tissue showcases prostatic glandular units with a preserved, continuous basal cell layer; gland lumina are variably sized and lined by two cell layers in many foci. The basal cell population exhibits diffuse, strong positivity for high molecular weight cytokeratin (HMWCK) with a brown chromogen, outlining the acinar architecture. Adjacent stromal and epithelial cells show non-specific blue hematoxylin counterstain. The staining pattern contrasts with adenocarcinoma, where the basal layer is typically disrupted or absent; here, the intact basal cell layer argues against neoplastic invasion and favors basal cell hyperplasia. p63 immunoreactivity is present in basal cells, reinforcing benign histology. In differential, prostatic hyperplasia with epithelial budding may mimic carcinoma on H&E, but the IHC demonstrates basal cells per gland. Clinically relevant use: helps distinguish benign prostatic hyperplasia with basal cell hyperplasia from prostatic adenocarcinoma in suspicious needle biopsy cores, reducing overtreatment and guiding management. The image demonstrates an educational example of diagnostic IHC utility, where basal cell markers are essential in challenging cases. The technique is commonly employed in uropathology practice to confirm benign versus malignant prostatic lesions. Correlation with morphology improves diagnostic confidence significantly.

This is a formalin-fixed paraffin-embedded prostatic biopsy tissue section, analyzed by light microscopy with immunohistochemical staining for basal cell markers. The primary histology in the image demonstrates a pseudohyperplastic pattern of prostatic adenocarcinoma, characterized by gland-forming proliferations with cribriform and back-to-back glands and mild to moderate cytologic atypia. The malignant glands completely lack a discernible basal cell layer, a key feature distinguishing cancer from benign prostatic hyperplasia. By contrast, an internal positive control of benign prostatic glands along the right edge shows intact basal cells positive for high molecular weight cytokeratin (34βE12) and p63, validating the stain and serving as an internal control. The tumor glands display absence of basal cells while the luminal epithelium remains columnar to cuboidal with small nucleoli, resulting in a histologic appearance that can mimic hyperplasia. Immunostaining thus supports diagnosis of prostatic adenocarcinoma of the pseudohyperplastic type. Clinically this diagnosis is relevant in PSA interpretation, prognosis, and management decisions; differential diagnoses include benign prostatic hyperplasia and other mimickers such as high-grade PIN or intraductal carcinoma when interpreted in full. This image is suitable for educational demonstration of basal cell–deficient glands and internal control use in IHC diagnostics.

Gross pathology photograph of an autopsy prostatic specimen demonstrating benign prostatic hyperplasia with median lobe enlargement projecting into the bladder neck. The tissue appears tan‑brown and nodular, with a prominent midline lobe extending anteriorly toward the bladder outlet and creating a ball‑valve type obstruction at the bladder neck. The surrounding capsule and adjacent prostatic zones show variable, fibromuscular hyperplasia consistent with nodular hyperplasia rather than malignant invasion. This gross appearance reproduces the classic mechanism of lower urinary tract symptoms in aging men: progressive prostatic enlargement compresses the urethral channel, especially at the bladder outlet, producing obstructive and irritative voiding disorders. The autopsy context confirms a non‑malignant process, though histology would be required to definitively exclude focal carcinoma. Notable features include bilateral symmetry of nodular growth and conspicuous midline protrusion, which can be associated with reduced urinary flow, incomplete emptying, and increased postvoid residuals. Clinically, these findings underpin diagnostic considerations such as benign prostatic hyperplasia and differential diagnoses including prostatic adenocarcinoma or prostatitis; radiologic or endoscopic correlation may help stage obstruction. Educationally, this image serves as a reference for urology trainees and pathology learners to understand gross anatomy, angioarchitecture, and the anatomic basis of bladder outlet obstruction in BPH.

Prostate histopathology slide prepared from either transurethral resection (TURP) specimen or needle core biopsy, evaluated by light microscopy following Hematoxylin and Eosin staining. The architectural pattern consists of small to medium-sized glandular units arranged in lobules with sieve-like, cribriform cradles, creating an irregular lattice within the prostatic parenchyma. Glands display variable cytoplasmic clearing in some acini, leading to a pale, vacuolated appearance; however, not all glands show cytoplasmic clearing. The epithelial cells typically exhibit low to absent cytologic atypia: nuclei are uniform, with minimal pleomorphism, rare nucleoli, and lack of conspicuous mitotic activity. A prominent basal cell layer is preserved and readily evident around many glands, which supports a benign process and helps distinguish from prostatic adenocarcinoma. A variant of epithelial hyperplasia, commonly termed clear cell cribriform hyperplasia, frequently seen in TURP specimens but can be encountered in needle biopsy samples. The overall impression is benign cribriform prostatic epithelial proliferation without invasion. Diagnostic significance includes exclusion of high-grade prostatic intraepithelial neoplasia (PIN) and prostate adenocarcinoma. Clinically, recognizing this entity prevents overtreatment; correlated with imaging and PSA history in differential diagnoses such as benign prostatic hyperplasia and other prostatic lesions. This entity does not typically require urgent management changes beyond standard monitoring and routine clinical correlation.

Gross pathology photograph of a pelvic prostatic specimen showing marked enlargement of the middle and posterior prostatic lobes, producing bladder outlet obstruction. The image captures exposed tissue with thickened detrusor muscle and subepithelial fibrosis consistent with chronic obstruction. Prostatic hyperplasia results in nodular enlargement of the periurethral transitional zone, with irregular surface architecture and vascularity typical of benign prostatic hyperplasia (BPH). The bladder wall and detrusor are hypertrophied as a compensatory response, reflecting long-standing outlet resistance and increased bladder workload. This specimen illustrates the pathophysiology of aging-related prostatic enlargement: progressive glandular proliferation, stromal expansion, and smooth muscle hypertrophy that impede urine flow, elevate intravesical pressure, and predispose to symptoms such as hesitancy, weak stream, and nocturia. Clinically relevant terms include BPH, benign prostatic hyperplasia, LUTS, urinary retention risk, detrusor hypertrophy, chronic obstruction, and pelvic genitourinary anatomy. Pathological significance lies in correlating anatomic changes with functional impairment and guiding management decisions in urology. Differential considerations encompass prostate adenocarcinoma in enlargement, prostatitis with nodularity, and secondary bladder remodeling. Educationally, this image supports discussions of prostatic architecture, disease progression, and the gross features used in diagnosis and teaching within pathology and urology. Education.