Pathology Cheat Sheet
Zone, Grade, and Invasion
Prostate and penile pathology for NEET-PG: BPH transition zone, prostate adenocarcinoma peripheral zone, Gleason grading, PSA, and HPV penile carcinoma.
MedNext Academy | 3 min read
Zone, Grade, and Invasion
Prostate and penile pathology for NEET-PG: BPH transition zone, prostate adenocarcinoma peripheral zone, Gleason grading, PSA, and HPV penile carcinoma.
Benign prostatic hyperplasia, prostate carcinoma with its grading, and penile carcinoma.
High-yield lines
- Benign prostatic hyperplasia arises in the transition zone and is driven by dihydrotestosterone.
- Benign prostatic hyperplasia causes bladder outlet obstruction with hesitancy, frequency, and nocturia.
- Benign prostatic hyperplasia shows nodular glandular and stromal proliferation with corpora amylacea.
- Prostate carcinoma arises mainly in the peripheral zone and is often detected on rectal examination.
- Prostate carcinoma is an adenocarcinoma with small crowded glands lacking a basal cell layer.
- The Gleason grading system sums the two most common architectural patterns to give a score.
- Prostate-specific antigen is used to screen for and monitor prostate carcinoma.
- Prostate carcinoma characteristically metastasises to bone producing osteoblastic lesions.
- Penile squamous cell carcinoma is associated with high-risk HPV infection and lack of circumcision.
- Carcinoma in situ of the penis includes Bowen disease and erythroplasia of Queyrat.
- Perineural invasion is a common feature of prostate adenocarcinoma.
- Benign prostatic hyperplasia does not itself progress to prostate cancer as they arise in different zones.
Mapped competency codes
- PA29.2
- PA29.3
- PA29.4
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This summary maps to PA29-male-genital-tract.
Frequently Asked Questions
Where do benign prostatic hyperplasia and prostate carcinoma arise?
Benign prostatic hyperplasia arises in the transition zone causing outlet obstruction, whereas prostate carcinoma arises mainly in the peripheral zone.
How is prostate carcinoma graded?
By the Gleason system, which sums the two most common architectural glandular patterns to produce a score correlating with prognosis.
Where does prostate carcinoma typically metastasise?
To bone, where it characteristically produces osteoblastic (sclerotic) lesions, especially in the vertebrae and pelvis.
What is the main risk factor for penile carcinoma?
Infection with high-risk human papillomavirus, along with lack of circumcision and poor hygiene.
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