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Endometritis is inflammation of the endometrium,[1] the inner lining of the uterus.

Endometritis - 2 - cropped - very high mag.jpg
Micrograph showing a chronic endometritis with the characteristic plasma cells. Scattered neutrophils are also present. H&E stain.
Classification and external resources
Specialty gynaecology
ICD-10 N71
ICD-9-CM 615.9
DiseasesDB 4283
MedlinePlus 001484
eMedicine med/676 ped/678
MeSH D004716

Pathologists have traditionally classified endometritis as either acute or chronic: acute endometritis is characterized by the presence of microabscesses or neutrophils within the endometrial glands, while chronic endometritis is distinguished by variable numbers of plasma cells within the endometrial stroma. The most common cause of endometritis is infection. Symptoms include lower abdominal pain, fever and abnormal vaginal bleeding or discharge. Caesarean section, prolonged rupture of membranes and long labor with multiple vaginal examinations are important risk factors[citation needed]. Treatment is usually with broad-spectrum antibiotics.

The term "endomyometritis" is sometimes used to specify inflammation of the endometrium and the myometrium.[2]


Acute endometritisEdit

Acute Endometritis is characterized by infection. The organisms most often isolated are believed to be because of compromised abortions, delivery, medical instrumentation, and retention of placental fragments.[3] There is not enough evidence for the use of prophylactic antibiotics to prevent endometritis after manual removal of placental in vaginal birth.[4] Histologically, neutrophilic infiltration of the endometrial tissue is present during acute endometritis. The clinical presentation is typically high fever and purulent vaginal discharge. Menstruation after acute endometritis is excessive and in uncomplicated cases can resolve after 2 weeks of clindamycin and gentamicin IV antibiotic treatment.

In certain populations, it has been associated with Mycoplasma genitalium and pelvic inflammatory disease.[5][6]

Chronic endometritisEdit

Chronic Endometritis is characterized by the presence of plasma cells in the stroma. Lymphocytes, eosinophils, and even lymphoid follicles may be seen, but in the absence of plasma cells, are not enough to warrant a histologic diagnosis. It may be seen in up to 10% of all endometrial biopsies performed for irregular bleeding. The most common organisms are Chlamydia trachomatis (chlamydia), Neisseria gonorrhoeae (gonorrhea), Streptococcus agalactiae (Group B Streptococcus), Mycoplasma hominis, tuberculosis, and various viruses. Most of these agents are capable of causing chronic pelvic inflammatory disease (PID). Patients suffering from chronic endometritis may have an underlying cancer of the cervix or endometrium (although infectious cause is more common). Antibiotic therapy is curative in most cases (depending on underlying cause), with fairly rapid alleviation of symptoms after only 2 to 3 days.

Chronic granulomatous endometritis is usually caused by tuberculous. The granulomas are small, sparse, and without caseation. The granulomas take up to 2 weeks to develop and since the endometrium is shed every 4 weeks, the granulomas are poorly formed.

In human medicine, pyometra (also a veterinary condition of significance) is regarded as a form of chronic endometritis seen in elderly women causing stenosis of the cervical os and accumulation of discharges and infection. Symptom in chronic endometritis is blood stained discharge but in pyometra the patient complaints of lower abdominal pain.


Pyometra describes an accumulation of pus in the uterine cavity. In order for pyometra to develop, there must be both an infection and blockage of cervix. Signs and symptoms include lower abdominal pain (suprapubic), rigors, fever, and the discharge of pus on introduction of a sound into the uterus. Pyometra is treated with antibiotics, according to culture and sensitivity.

See alsoEdit


  1. ^ "endometritis" at Dorland's Medical Dictionary
  2. ^ Hubert Guedj; Baggish, Michael S.; Valle, Rafael Heliodoro (2007). Hysteroscopy: visual perspectives of uterine anatomy, physiology, and pathology. Hagerstwon, MD: Lippincott Williams & Wilkins. p. 488. ISBN 0-7817-5532-8. 
  3. ^ "Endometritis - Pregnancy Articles". 21 November 2013. Retrieved 11 April 2018. 
  4. ^ Chongsomchai, C; Lumbiganon, P; Laopaiboon, M (Oct 20, 2014). "Prophylactic antibiotics for manual removal of retained placenta in vaginal birth". The Cochrane Database of Systematic Reviews. 10 (10): CD004904. doi:10.1002/14651858.CD004904.pub3. PMID 25327508. 
  5. ^ Cohen CR, Manhart LE, Bukusi EA, et al. (March 2002). "Association between Mycoplasma genitalium and acute endometritis". Lancet. 359 (9308): 765–6. doi:10.1016/S0140-6736(02)07848-0. PMID 11888591. 
  6. ^ Ljubin-Sternak, Suncanica; Mestrovic, Tomislav (2014). "Review: Clamydia trachonmatis and Genital Mycoplasmias: Pathogens with an Impact on Human Reproductive Health". Journal of Pathogens. 2014 (183167): 3. doi:10.1155/2014/183167. PMC 4295611 . PMID 25614838.