Prostatisis must be differentiated from other diseases that cause lower abdominal pain and fever like appendicitis, diverticulitis, inflammatory bowel disease, cystitis, Colorectal cancer, and endometritis.
Serum carcino-embryogenic antigen 
Low Vit b12
Hypercalcemia
Leukocytosis
Or
Diarrhea
Leukocytosis
Leukocytosis
No specific tests
CT scan used to detect the hernia and to show if it is single or multiple
Suprapubic tenderness
Pyuria
Presence of nitrites and leukocyte estrase
X ray is done to probe the suspicion of emphysematous cystitis.
CT scan shows gas in the bladder in cases of emphysematous cystitis.
Groin pain
Tender and enlarged
Serum PSA elevated
Leukocytosis
Elevated CRP
CT scan shows edema and enlarged prostate
Abscess may be observed
Purulent vaginal discharge
Nucleic acid amplification tests is the best laboratory test for PID.
No specific tests
Ultrasound is helpful to rule out other differential diagnosis such as pelvic abscess, thrombosis and masses
Vaginal discharge
Vaginal bleeding
Leukocytosis
Vaginal discharge
Prostatitis must be differentiated from various other diseases on the basis of symptoms like dysuria. The differential diagnosis includes acute cystitis, benign prostatic hyperplasia, prostatic abscess, bladder cancer, urinary tract stones, and a foreign body within the urinary tract.
Prostatitis differential diagnosis
Prostatitis other diagnostic studies
Cystitis differential diagnosis
Prostatitis risk factors
Rectal prolapse differential diagnosis
Urethritis differential diagnosis
Radiation proctitis differential diagnosis
Endometriosis differential diagnosis