Urology
Carcinoma prostate
Etiology
65 years or older
Second most common type in old males
Clinical features
Might occur after prostatectomy
As the outer layer is left behind
Mass felt in the anterior rectal wall during rectal exam
Bone pain (metastasis)
Sciatica (thorocolumbar metastasis)
Hematuria
Acute Urinary retention
Difficulty passing urine
Spread
Prostate metastasis are multiple and moth like, osteoblastic.
Hematogenous- bones via veins especially the vertebrae, then femur, pelvis.
Lymphatic- first in the illiac, then para aortic, medistinal finally in left supraclvicular.
Direct- urithra, bladder, seminal vesicles, rectum.
Investigation
Serum acidic phosphatase: present in prostate, usually not detected in serum, but its found during malignancy.
Serum alkaline phosphatase
PROSTATE SENSITIVE ANTIGEN
Very important indicator
4nmol/ml - malignancy possible
10nmol/ml- malignancy
35 nmol/ml - disseminated.
Transrectal trucut biopsy
Xray (bones), CT, MRI, ultrasound, bone scan.
Staging
T0- nil. T1- T1a(<5%), T1b(>5%), T1c (all found only on histology, non symptomatic, not palpable)
T2- T2a (single lobe, within capsule), T2b (both lobes, within capsule).
T3- outside the capsule
T4- metastasis
Treatment-
Early malignancy (T1,T2)
PSA (prostate specific antigen) <20 nmol/ml
Radical prostectomy
Radical radiotherapy
Late malignancy
1.Androgen ablation-
Low orchidetomy
Oral Stillbestrol (estrogen)
(Disuria, pain disappears in 48 hrs)
Phosphorylated diethyl stilbestrol.
2.Radiotherapy-
Localized radiotherapy
Hemobody irradiation (one half of body radiation)
3.Chemotherapy-Mitomycin, nytrogen mustard.