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Acute Pelvic Pain

Overview

Pelvic pain of sudden onset. Of women of reproductive age it is a ectopic pregnancy until proven otherwise. Refer immediately to gynaecology all patients with a pelvic mass, abnormal cervix, or persistent bleeding.

Definition
Chronic pelvic pain (CPP): refers to pain of at least six months’ duration that occurs below the umbilicus and is severe enough to cause functional disability or require treatment.
Acute pelvic pain: generally defined as pain in the lower abdomen or pelvis lasting less than three months. In women, it can pose a challenging clinical scenario in which history and physical examination findings are often nonspecific, and the clinical presentation of each condition can vary widely.

Differential Diagnosis

Acute pelvic pain – Gyaenacological

  • Ectopic pregnancy
  • Miscarriage
  • Ovarian cyst rupture
  • Ovarian torsion
  • Ovarian haemorrhage
  • Fallopian torsion
  • Endometritis
  • Pelvic Inflammatory Disease
  • Mittelschmerz

Acute Pelvic Pain – Non-Gyaenacological

  • Appendicitis
  • Urinary stones
  • Urinary Tract infection
Remember In a pregnant woman these differential will be different as the pain might be due to the obstetric complications.
Side note In Adolescents don’t forget transverse vaginal septum and imperforate hymen.
Think In postmenopausal women who present with acute pelvice pain, ectopic pregngnacy and ovarian torsion is unlikely.

Chronic Pelvic Pain will be discussed elsewhere
More info on Chronic Pelvic Pain

DIFFERENTIAL DIAGNOSIS OF ACUTE PELVIC PAIN
ConditionHistoryExamination
Ectopic PregnancyNausea, vaginal bleedingAdnexal mass, hypotension
Miscarriagevaginal bleeding 
Ovarian torsionNausea, vomiting, radiation of pain to groin, right sided or left sided pelvic pain 
Ovarian cystDyspareunia, left sided pelvic pain, Hypotension (ruptured left cyst)Adnexal mass
Endometriosis/endometritisDysmenorrhoea, DyspareuniaAdnexal mass
Pelvic inflammatory diseaseBilateral pelvic pain, Dysuria, Vaginal DischargeAdnexal mass, bilateral adominal examination, cervical motion, uterine or adnexal tenderness, Fever, vaginal discharge
AppendicitsNausea, vomiting, pain migration from periumbilical to RLQ of abdomenFever, RLQ pain
Urinary tract infectionDysuria, Gross haematuria, Urinary FrequencyFever
Urinary stonesleft sided pelvic pain, Gross haematuria, radiation of pain to groin 
Think Life threatening causes of pelvic pain are ectopic pregnancy, ruptured ovarian cyst, ovarian torsion, appendicits and PID.

Evaluation and Approach

  • History
  • Examination
  • Psychological Assessment
  • Investigations
    • β-hCG
    • FBC, group and save – if ectopic suspected
    • ESR/ CRP
    • Urinary/serum hCG
    • MSU
    • Triple swabs – STI?
    • Pelvic USS
    • Abdominal X-ray
    • CT
    • MRI
    • Diagnostic laprosocopy
Remember β-hCG to rule out pregnancy.
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