vulvar mesonephric cyst
Introduction
Introduction to renal cyst in the vulva The vulvar cyst in the vulva is usually located next to the uterus or the vagina, but sometimes it can protrude from the side wall of the vaginal opening or bulge below the vestibule of the vestibule. It is called Gartner cyst, below the vestibular urethra. The bulge is called the vestibular cyst. basic knowledge Sickness ratio: 0.0001% Susceptible people: women Mode of infection: non-infectious Complications: urinary retention
Cause
The cause of renal cyst in the vulva
(1) Causes of the disease
The cyst of the vulva in the vulva is a cyst from the residual of the middle kidney tube, which is rare in the vulva because the end portion of the residual kidney tube only reaches the hymen and the vaginal opening. Therefore, the cyst occurs in the hymen, and the labia minora is adjacent to the clitoris or around the urethra. The place.
(two) pathogenesis
Organizational occurrence
The middle renal cyst originates from the remnant of the vaginal part of the kidney in women. During normal embryonic development, the structure of the middle kidney is degraded and locked, and its glandular lining is lost. If these small tubes persist and retain their secretory function, they may accumulate due to secretions. And the formation of cysts.
The secondary renal cyst is difficult to distinguish from the middle renal cyst. It occurs in the remnant of the renal tube (Fig. 1). In the early stage of the embryo, the vaginal gland is occupied by the glandular epithelium of the deputy middle kidney structure, and later due to urine. The stratified squamous epithelium of the genital sinus grows up, replacing the original secondary renal tubular epithelium. During this process, some secondary renal epithelial islands may be left behind because of its glandular epithelial structure and secretory function. Therefore, a secondary renal cyst was formed.
2. Pathological examination
The inner wall of the renal cyst is lined with a ciliated cuboid or low columnar epithelium, with a clear basement membrane. Occasionally, the squamous epithelium is seen in the lumen. There are two types of renal cysts in the middle, namely the cervical epithelium and the fallopian tube epithelium. The cervical canal epithelium has a high columnar epithelium that secretes mucus. The nucleus is located at the bottom and has a clear cytoplasm, sometimes called a piggy cell. The main features of the fallopian tube epithelium are the irregular columnar epithelium, some Ciliated, some without cilia, large nuclei, unclear base film.
In addition to the morphology of the epithelial cells in the kidney and the secondary renal cyst, there is also a difference in the smooth muscle fibers in the periphery. The middle kidney cyst has smooth muscle fibers on the outer side of the epithelium and the secondary renal cyst is often absent. The most reliable method It was identified by PAS staining. The renal cyst was free of mucus, PAS was negative, and the secondary renal cyst was positive.
Prevention
Prevention of renal cyst in vulva
1, pay attention to hygiene: pay attention to health education, keep the genital clean and dry.
2, enhance physical fitness, prevent infection: pay attention to work and rest, eat more fresh fruits and vegetables rich in vitamins, exercise more, rest more.
3, regular physical examination: early prevention can improve survival rate, regular observation and follow-up.
Complication
Complications of renal cyst in the vulva Complications, urinary retention
If the cyst occurs under the urethra, there may be symptoms of frequent urination or urinary retention.
Symptom
Symptoms of renal cyst in the vulva Common symptoms Male lower abdomen pain cyst swelling vulva
The renal cyst in the vulva is mostly located in the labia minora, the clitoris, and the hymen. From the histological point of view, the cyst of the middle kidney structure should appear in the lateral anterior part of the vestibule, while the cyst of the secondary kidney can be found in any part of the vestibule. Occurrence, such cysts are thin, translucent, often with pedicles, and those with smaller cysts are asymptomatic. When the cysts are large, there is a feeling of discomfort. The cysts are single, occasionally occur on both sides, and the cysts are generally small. The diameter is mostly 1~2cm, but there are also those with a diameter of 10cm. It protrudes from the vaginal opening. The wall of the capsule is very thin and has a sense of fluctuation. Sometimes the cyst can be inserted into the extraperitoneal cavity along the vaginal side.
Examine
Examination of renal cyst in the vulva
PAS staining examination, tumor marker examination.
Histopathological examination.
Diagnosis
Diagnosis and differentiation of renal cyst in vulva
The cyst is mostly located in the hymen, the lateral anterior part of the vestibule, generally small, rarely infected, more asymptomatic, pathological examination can confirm the diagnosis.
Identification with a secondary renal cyst.
