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What is PID
Pelvic inflammatory disease (PID) is a clinical syndrome that results
from the ascension of microorganisms from the cervix and vagina to
the upper genital tract.
Approximately one million women are diagnosed yearly
It is the most common serious STD complication
.
Acute PID is commonly caused by Chlamydia and Gonorrhea
Most women with acute PID have BacterialVaginosis (BV)
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Center for Disease Control
The CDC states it is an inflammatory disorder of the upper female
genital tract, including any combination of fallopian tubes, uterine
lining, ovaries, upper genital tract, uterus, throughout the pelvic
area.
Difficult to diagnose due to wide variation in symptoms
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Clinical Manifestations
• Subclinical disease (asymptomatic), which is thought to be present 60% of the time, is
notable because it lacks symptoms. This makes diagnosis and treatment problematic. Women may
experience dyspareunia, irregular bleeding, dysuria, or gastrointestinal symptoms, which they may
not link to PID, and therefore, may not seek care. C. trachomatis is particularly implicated in
subclinical PID.
• Mild to moderate PID, women may complain of lower abdominal pain or pelvic pain,
cramping, or dysuria. They may also exhibit signs such as intermittent or post-coital bleeding,
vaginal discharge, or fever. Uterine tenderness or cervical motion pain or adnexal tenderness is
most often present on pelvic exam in most cases of moderate PID.
• Severe PID, women appear very ill with fever, chills, purulent vaginal discharge, nausea,
vomiting, and elevated white blood cell count (WBC). Other laboratory indicators, such as
erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP), may also be elevated.
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Sequelae
• Approximately 25% of women with a single episode of symptomatic PID
will experience ectopic pregnancy, infertility, or chronic pelvic pain.
• The risk of ectopic pregnancy is increased six- to ten-fold after PID.
• Tubal infertility occurs in 8% of women after one episode of PID, in
20% of women after two episodes, and in 50% of women after three
episodes.
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Empiric treatment should be initiated in sexually active young
women & women at risk if there is pelvic or lower abdominal pain,
if no cause for the illness other than PID is identified and if one or
more of the following minimum criteria are present on pelvic exam:
1) cervical motion tenderness
2) Uterine tenderness
3) adnexal tenderness
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Requiring all three minimum criteria be present before treating can result
in insufficient diagnosis of PID
Most women with PID have either mucopurulent cervical discharge or
increaseWBC;s under microscope = infection
The presence of signs of lower genital tract infection plus one of the
three minimum diagnosis increases the specificity of the diagnosis
If cervical discharge is normal and noWBC’s are present the diagnosis is
unlikely and alternative causes of pain should be considered.
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Risk Factors
PID is elevated in sexually active teens partially due to the immature
cervical cells and frequently changing sex partners.
Having multiple sex partners
Women who douche
Women with IUD’s
Previous STD infections may elevate PID risk due to damage of
reproductive organs from the initial infection
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Epidemology
Diagnosed in 1-5% of women in STD clinics in US
Declining rates since the 1990’s
Overt or subclinical PID is the most common cause of ectopic
pregnancy and tubal infertility
Incubation Period:
Varies from 10 days to several months follow acquisition of Chlamydia
or Gonorrhea
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Symptoms
Abnormal or unusual vaginal discharge (yellow/green/malodorous)
Abnormal vaginal bleeding
Dull pain and tenderness in stomach
Lower abdominal or pelvic pain nearly universal in symptomatic cases
Pain with urination
Pain with intercourse (dyspareunia)
Pain in back
Elevated temperature and fever
Irregular menses
Spotting and cramping with prolonged painful menses.(menorrhagia)
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Physical Exam
• Pelvic adnexal tenderness usually bilaterally
• Uterine fundal and cervical motion tenderness
• Signs of MPC or BV
• Fever is common but often absent
• Lower quadrant abdominal tenderness, sometimes rebound tenderness
present
• Adnexal mass may be present
• R upper quadrant tenderness may be present
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Diagnostic Criteria
• In sexually active women, low abdominal pain with adnexal or
cervical motion tenderness
• Fever may be present
• Mucopurulent cervicitis and discharge
• Abundant WBC’s in cervical or vaginal discharge
• Cervical infection with Chlamydia or Gonorrhea
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Lab diagnosis
• Lab evidence of BV or MCP
• Other tests:
Pelvic ultrasound
Laparoscopy may be indicated if diagnosis is uncertain
Endometrial Biopsy helpful with endometritis
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Differential diagnosis
• Appendicitis
• Ectopic pregnancy
• Septic abortion/miscarriage (associated with a serious uterine infection)
• Hemorrhagic, ruptured or twisted ovarian cysts
• Tumors
• Degeneration of a myoma
• Acute enteritis (inflammation small intestine)
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Treatment
• Treat on symptoms prior to lab results
• Outpatient:
Ceftriaxone 250 mg IM x 1
Doxycycline 100 mg PO BID x 14 days
Metronidazole 500 mg PO BID x 14 days
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Bibliography
• CDC. Pelvic Inflammatory Disease. Morbidity and Mortality Weekly
Report 2010; 59 :63-67
• Handsfield, Hunter. H. Sexually Transmitted Diseases Third Edition.
2011;267-277
• Klausner, Jeffrey D., Hook, Edward W III, Current Diagnosis and
Treatment Sexually Transmitted Diseases.2007;46-51
