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Li Yuan Wei
Urology
About me
Chief physician, medical doctor, master's supervisor of Hunan Normal University, director of urology department at Hunan Provincial People's Hospital, also serving as director of the urology department, head of the urological disease research laboratory, deputy director of the Andrology Department of Hunan Traditional Chinese Medicine and Integrative Medicine Association, member of the Minimally Invasive Urology Committee of Hunan Urology Association, member of the Male Genitourinary Tumor Group of the Hunan Anti-Cancer Association, member of the Endoscopy Professional Committee of Hunan Province. He has visited and studied in multiple urology centers at home and abroad, and has extensive clinical experience.
Proficient in diseases
The main research interests include the diagnosis and treatment of genitourinary tumors, minimally invasive treatment of genitourinary diseases, urinary tract reconstruction, and diagnosis and treatment of complex and difficult diseases.
Voices
Is nephroblastoma a type of kidney cancer?
From a broad perspective, nephroblastoma belongs to kidney cancer, but its characteristics are still different. Nephroblastoma, also known as Wilms' tumor or embryonal tumor of the kidney, is the most common malignant kidney tumor in children, generally 80% of cases occur before the age of five, with an average age of about 3.5 years. The main manifestation is an abdominal mass, most often incidentally discovered by parents or doctors. Diagnosis is generally made through renal ultrasound as an initial screening, while renal CT and MRI can clearly show the extent of the tumor and the surrounding lymph nodes and organs, and whether renal blood vessels are involved. Chest X-rays or CT scans can determine if there are any lung metastases.
Is hydronephrosis of the second degree severe?
Hydronephrosis grade two, this "grade two" is likely a classification used in ultrasound or CT imaging. For hydronephrosis, the presence of condition itself indicates that the pathology has already affected kidney function. The most common causes include ureteral obstruction, or obstruction at the renal pelvis exit, typically due to stones or tumors, or narrowing caused by plastic tubes. Once hydronephrosis occurs, these conditions have already altered kidney function, necessitating further diagnosis to identify the cause, with surgery possibly being required. The most common objective assessment is a CT scan of the urinary system, with enhanced CT being the most accurate for understanding the severity of the hydronephrosis. Also, it helps identify the location of the ureteral obstruction, and thirdly, it can help ascertain the cause and provide treatment.
Clinical manifestations of renal cancer
The clinical manifestations and staging of kidney cancer are related to the most common early-stage kidney cancer, late-stage kidney cancer, or metastatic kidney cancer. Generally, early-stage kidney cancer exhibits few clinical symptoms and is often detected during physical examinations, through ultrasonography of the urinary tract, or kidney ultrasonography, where tumors are the most commonly found. Additionally, later stages of kidney cancer often present as swelling pain in the waist area or occasional hematuria. More serious conditions involve feeling a mass in the upper abdomen upon palpation, which is a clinical manifestation. Nowadays, with heightened awareness for health checks, such conditions are generally discovered through these examinations. When major clinical manifestations like hematuria and abdominal masses occur, it indicates that the kidney tumor has already progressed to the mid or late stages.
What are the characteristics of hematuria in renal cancer?
What we commonly refer to as kidney cancer actually includes two aspects. One is renal cell carcinoma, and the other is renal pelvis cancer or ureteral cancer. The characteristics of hematuria are different in these two types. Renal cell carcinoma, simply understood, grows inside the kidney and is not connected with urine. Only when the kidney tumor grows large enough to breach the kidney or renal pelvis will the tumor rupture and bleed, causing hematuria. This generally occurs in the middle to late stages of kidney cancer. On the other hand, renal pelvis cancer or ureteral cancer exhibits intermittent hematuria in the early stages without significant symptoms, but as it progresses to the middle and late stages, symptoms like kidney hydronephrosis and hematuria slowly appear. When diagnosing these conditions, any occurrence of hematuria must be investigated to determine the cause. Initial screening can be done using urinary system ultrasound, urinalysis, or routine urine tests. More precise methods include enhanced CT or MRI of the urinary system, which facilitate easier diagnosis.
Can prostate stones be expelled?
Prostatic calculi generally involve two aspects of diagnosis. One part is called prostatic urethral or urethral prostatic calculi, which can be simply understood as urethral calculi located in the prostatic region. The second type is calculi inside the prostate, commonly referred to as prostatic calcification. These are most commonly seen during prostatitis and while taking medications. Typically, these calculi are asymptomatic and do not require special treatment. However, the second type, which are the calculi in the prostatic urethra (urethral calculi located in the prostatic part), usually affect urination and require removal through minimally invasive surgery.