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The provided system is designed to classify radiation-induced hemorrhagic cystitis based on clinical signs and findings according to the EORTC/RTOG classification. The classification is interpreted as grades, and the inputs range from mild symptoms to severe conditions, even including death directly due to hemorrhagic cystitis.

The system takes a single input corresponding to a description of clinical signs and findings. Each description corresponds to a specific grade of severity, ranging from Grade 1 to Grade 5, as follows:

1. Slight epithelial atrophy, minor telangiectasia, microscopic hematuria is classified as Grade 1.
2. Moderate frequency, generalized telangiectasia, intermittent macroscopic hematuria is classified as Grade 2.
3. Severe frequency and dysuria, generalized telangiectasia often with petechiae, frequent hematuria with decreased bladder capacity is classified as Grade 3.
4. Necrosis/contracted bladder, severe hemorrhagic cystitis is classified as Grade 4.
5. Death directly due to hemorrhagic cystitis is classified as Grade 5.

The computation process is straightforward:
- The system checks the input against each predefined description.
- If a match is found, it assigns the corresponding grade as the result.
- In case no valid input is provided, it returns a message stating that a selection must be made for the input.

The calculator in question is the EORTC/RTOG (European Organisation for Research and Treatment of Cancer / Radiation Therapy Oncology Group) classification of radiation-induced hemorrhagic cystitis. This scoring system is specifically used for patients who have undergone radiation therapy and are experiencing symptoms of hemorrhagic cystitis, a condition characterized by inflammation and bleeding of the bladder.

The EORTC/RTOG classification system is clinically useful in assessing the severity of radiation-induced hemorrhagic cystitis. It helps clinicians to quantify the extent of the condition and guide appropriate treatment strategies. The scoring system ranges from Grade 0 (no change) to Grade 4 (necrosis or severe symptoms requiring intervention).

There are no specific exclusion criteria for the use of this calculator. However, it is important to note that this scoring system is specifically designed for radiation-induced hemorrhagic cystitis. Therefore, it may not be applicable or accurate for patients with hemorrhagic cystitis resulting from other causes, such as bacterial infections or certain medications.

EORTC/RTOG classification of radiation-induced hemorrhagic cystitis

This tool evaluates the severity of hemorrhagic cystitis based on urine findings, determining one of four possible grades. By selecting the description that best matches the urine's appearance, the tool categorizes the condition as follows:

- **Non-visible hematuria** indicates Grade I, representing the mildest form of the condition without visible blood in the urine.
- **Macroscopic hematuria** corresponds to Grade II, where blood is visibly present in the urine.
- **Macroscopic hematuria with small clots** is classified as Grade III, showing noticeable clots along with visible blood.
- **Gross hematuria with clots causing urinary tract obstruction requiring instrumentation for clot evacuation** is assigned Grade IV. This represents the most severe form, where clots have accumulated to the point of blocking urine flow, necessitating medical intervention to clear the obstruction.

Understanding these grades helps in recognizing the severity and potential complications associated with hemorrhagic cystitis, guiding appropriate medical response.

The calculator in question is the Grading of Hemorrhagic Cystitis. This clinical scoring system is used specifically in patients who have developed hemorrhagic cystitis, a condition characterized by inflammation of the bladder that results in bleeding. The grading system is used to assess the severity of the condition, which can range from mild (Grade 1) to severe (Grade 4). 

The clinical utility of this calculator is to guide treatment decisions and to monitor the progression of the disease. It helps clinicians to determine the severity of the patient's condition and to predict the potential need for more aggressive interventions. 

There are no specific exclusion criteria for the use of this grading system. However, it should be noted that it is only applicable to patients who have been diagnosed with hemorrhagic cystitis. It is not intended to be used as a diagnostic tool for other conditions or diseases.

Radiation-induced hemorrhagic cystitis

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