Bladder Cancer Differential Diagnoses
- Author: Gary David Steinberg, MD, FACS; Chief Editor: Bradley Fields Schwartz, DO, FACS more...
Diagnostic Considerations
Any patient with gross or microscopic hematuria should be urologically evaluated. Patients with bladder cancer may have spontaneous resolution of gross or microscopic hematuria, which may lull the patient and the clinician into erroneously believing that no significant entity is present.
The presentation in bladder cancer may resemble urinary tract infection (UTI), or the 2 conditions may coexist. Both UTIs and bladder cancer cause hematuria, and bacteriuria occurs in about 50% of patients with squamous cell carcinoma. UTIs are usually associated with irritative voiding symptoms (eg, dysuria, frequency, urgency). Irritative voiding symptoms may also be caused by carcinoma in situ (CIS) or muscle-invasive bladder cancer; patients with CIS may present with irritative voiding symptoms only.
CIS is often misdiagnosed as a bladder infection and treated as such. Patients with irritative voiding symptoms that do not resolve with treatment for UTI require further evaluation. The investigation should include urine cultures for fungi and tuberculosis, as well as cytology studies.
Cystoscopy in patients with CIS may reveal a characteristic red, velvety appearance that resembles an area of inflammation, although, at times, CIS is not visible (see the image below). Diagnostic tests include a urine cytology test and/or one of several available bladder cancer markers. These tests are highly sensitive in detecting CIS. Bladder biopsies are needed to firmly establish a diagnosis. Urinary cytology is highly specific for urothelial bladder cancer, with improved sensitivity for high-grade tumors and cytology obtained by bladder wash or barbotage.
The classic appearance of carcinoma in situ as a flat, velvety patch. However, using special staining techniques such as 5-aminolevulinic acid, it has been shown that significant areas of carcinoma in situ are easily overlooked by conventional cystoscopy. Courtesy of Abbott and Vysis Inc. Unfortunately, urinary cytology is not especially helpful in early diagnosis of squamous cell carcinomas. Most of these tumors are not diagnosed until they are at an advanced stage.
With small cell carcinoma, the main differential diagnoses are high-grade urothelial carcinoma, lymphoma, and sarcoma. Additionally, metastatic small cell carcinoma should be ruled out based on the available clinical information. Because small cell carcinoma of the urinary bladder is often mixed with urothelial carcinoma and because any presence of small cell carcinoma is justifiable to render the diagnosis, it is important to thoroughly examine the tumor tissue.
Differential Diagnoses
- Hemorrhagic Cystitis: Noninfectious
- Nephrolithiasis
- Renal Cell Carcinoma
- Transitional Cell Carcinoma, Renal
- Ureteral Trauma
- Urinary Tract Infection, Females
- Urinary Tract Infection, Males
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| Cystoscopy Findings | Urine Cytology Findings | FISH* Findings | Action |
| Negative | Negative | Negative† | Routine follow-up |
| Negative | Negative | Positive‡ | Increased frequency of surveillance, whether FISH findings are false-positive or anticipatory positive |
| Negative | Positive | Negative or positive | Cancer until proven otherwise
|
| *FISH - Fluorescent in situ hybridization. †Negative predictive value 95%. ‡Positive predictive value 30%. | |||
| Stage | Recurrence, % | Progression, % |
| Ta | 55 | 11 |
| T1 | 61 | 31 |
| CIS | 45 | 23 |
| G1 | 61 | 2-4 |
| G2 | 56 | 5-7 |
| G3 | 50-70 | 30-40 |
| Early Complications | Rate, % | Late Complications | Rate, % |
| Ileus | 10 | Small-bowel obstruction | 7.4 |
| Wound infection | 5.5 | Ureteroenteric stricture | 7.0 |
| Sepsis | 4.9 | Renal calculi | 3.9 |
| Pelvic abscess | 4.7 | Acute pyelonephritis | 3.1 |
| Hemorrhage | 3.4 | Parastomal hernia | 2.8 |
| Wound dehiscence | 3.3 | Stomal stenosis | 2.8 |
| Bowel obstruction | 3.0 | Incisional hernia | 2.2 |
| Enterocutaneous fistula | 2.2 | Fistula | 1.3 |
| Rectal injury | 2.2 | Rectal complications | < 1 |

