seminal vesicle cyst
Introduction
Introduction to seminal vesicle cyst Congenital seminal vesicle cysts are rare, mostly found after puberty, often with ejaculatory duct obstruction, blood and urinary tract infections, can also cause urinary dysfunction symptoms due to compression of the bladder or urethra, a few are found in the rectal examination . basic knowledge Sickness ratio: 0.02% of specific population Susceptible people: seen in men Mode of infection: non-infectious Complications: hypospadias true hermaphroditism
Cause
The cause of seminal vesicle cyst
(1) Causes of the disease
Congenital seminal vesicle cysts can be divided into two types of cysts, which are formed by the seminal vesicle itself and the abnormal development of the renal tube during the embryonic stage. The male embryo is in the process of development, the middle renal collaterals, the middle kidney tube and some of the remaining renal tubules. Become useful or degraded useless, some parts of them often form some tubular or vesicular residual structure in the testis, epididymis or seminal vesicles, some form cysts, and some in the long-term life after birth, due to Some factors cause abnormal proliferation to form cysts. Recently, the literature reports that the occurrence of seminal vesicle cysts is related to autosomal dominant adult cytosis kidney disease (APKD). Some people (Varney, 1954) think that such cysts are equivalent. A shortened ureter or a cyst-like diverticulum that is thought to be a residual ureteral bud, is called a "pseudosperm cyst."
(two) pathogenesis
Most of the cysts are single-shot and vary in size. The largest volume is several thousand milliliters. It has been reported to reach 5000ml. Domestic Guohong reported that 1 case of cystic fluid reached 2500ml. In some cases, the ejaculatory duct was narrow or occluded, and it could be complicated by infection, stones, etc. In China, 7 cases of calculi were combined, and 1 case was as many as 157. The stones were mostly composed of calcium phosphate containing fructose. Wang Shusen et al. used a spectrometer to analyze a case of seminal vesicle stones. The chemical composition of each layer was hydrohydrate oxalate. Rarely, the microscopic examination of the cyst wall is collagen connective tissue, lining a layer of cubic epithelium, showing an inflammatory reaction, a large seminal vesicle cyst can cause ureteral obstruction.
Prevention
Seminal vesicle cyst prevention
There is no effective preventive measure for this disease. Early detection and early diagnosis are the key to the prevention and treatment of this disease.
Complication
Seminal vesicle cyst complications Complications, hypospadias, true hermaphroditism
Seminal vesicle cysts often have other malformations of the genitourinary organs, such as hypospadias, hermaphroditism, ipsilateral renal incompatibility, etc. There are also reports of contralateral kidney development.
Symptom
Symptoms of seminal vesicle cysts Common symptoms Urinary frequency urinary pain cysts Blood dysuria dysfunction Hematuria semen volume
The symptoms of this disease are blood, genital pain after ejaculation, urinary tract blood secretions, hematuria, frequent urination, dysuria, larger ones may have abdominal pain, dysuria, rectal or double diagnosis may touch cystic masses.
Examine
Examination of seminal vesicle cyst
B-mode ultrasound or CT scan can not only show the contour of the structure behind the bladder, but also distinguish between the substantial and cystic structures. The seminal vesicle cyst on the ultrasound image often occurs on one side of the seminal vesicle, showing an anechoic zone, and the capsule wall is smooth and thin. The echo of the posterior wall is enhanced. On the CT image, cystic thick-walled lesions in the seminal vesicle are visible. The density depends on the protein content in the cyst fluid (CT value 0~25Hu). The wall can be smooth or irregular, and the posterior capsule wall can be enhanced after scanning. Intensive, but no enhancement in the capsule, may be associated with abnormal or absent kidney morphology, seminal vesicle angiography is an important means of diagnosis, Wu Hongfei and other reports of 6 cases in 7 cases, Hao Jinrui and other reports of 14 cases of 11 cases of seminal vesicle diagnosis, bladder Microscopic examination revealed a triangular area of the bladder and a posterior wall bulge.
Canabthi et al believe that MRI is particularly useful for showing seminal vesicle lesions. T2WI is best for showing the shrinkage of the seminal vesicle and the low signal-enhanced cyst. It is also seen on T1WI when it is enhanced.
Diagnosis
Diagnosis and differentiation of seminal vesicle cyst
Diagnosis is based on clinical symptoms and digital rectal examination. Large cysts of the seminal vesicle are often misdiagnosed as urinary retention or filling of the bladder, but urine is not collected when the catheter is inserted. The rectal examination is performed on the prostate. and lump.
Seminal vesicle cysts need to be differentiated from seminal vesicle cancer. Seminal vesicle cancer is rare. Most of them are secondary to prostate, bladder, rectum or nearby tissues. Kato Tetsuo and others believe that cysts may be associated with malignant tumors and should be carefully identified. Can be hard and nodular, irregular fusiform mass, cystoscopy can be seen in the entire bladder bottom and triangle elevation, resulting in bladder neck obstruction, and primary symptoms, seminal vesicle angiography can determine the relationship between tumor and seminal vesicle.
The disease also needs to be differentiated from prostate cysts, hydatid cysts, bladder diverticulum and seminal vesiculitis. The latter can be differentiated by digital rectal examination, CT and B-ultrasound, and seminal vesicle and cystoscopy can be identified.
