Pregnancy excluded in line one, then torsion ranked above likelier diagnoses because an ovary has hours rather than days: that ordering is what this NU576 differential defends. Searches like "nu 576 unit 4 assignment example", "nu576 unit 4 sample" and "nu576 unit 4 example" land here.
A Spin Class, Sudden Left-Sided Pain and a Dermoid Nobody Followed: A Ranked Pelvic Pain Differential With Torsion First
[Student Name]
Purdue University Global
NU576: NP II - Primary Care of Women's Health
Unit 4 Pelvic Pain Differential
[Instructor Name]
[Date]
The patient is a composite; values and the old imaging report are bracketed.
Presentation
Ms. [K.], 29, a paralegal, was forty minutes into a spin class when she felt sudden, severe pain low on the left side. It has been constant since, rated 8 of 10, and she has vomited twice. No fever, no vaginal bleeding or discharge, no urinary symptoms, and a normal bowel movement this morning. Last menstrual period [two] weeks ago; sexually active with one partner; uses condoms. Heart rate [104], blood pressure [122/78], temperature [37.1] C. Abdomen tender in the left lower quadrant with guarding, no rebound. Pelvic exam: left adnexal tenderness, fullness; no cervical motion tenderness. Old imaging: a pelvic ultrasound [eight] months ago, done for irregular bleeding, reported a 6 cm left ovarian mature cystic teratoma, a dermoid, with a recommendation for gynecologic follow-up that did not happen.
Excluded First
Urine hCG: negative. Ectopic pregnancy is recorded as excluded, because a negative urine pregnancy test in a woman two weeks after her period makes it very unlikely.
Two Axes for Ranking
Each cause is ranked on how likely it is on this history and how much harm follows from missing it. Where the two conflict, harm decides the order, because some causes damage an organ within hours. Naming the axes before the table matters, since a reader who ranks only by likelihood might put a hemorrhagic cyst or even constipation first and send her home with analgesia and advice to return if worse. The two-axis ranking makes the reason for urgency explicit, and it is the reason the disposition is same-day referral rather than an ultrasound booked for next week.
The Ranked Table
1. Ovarian torsion. For: known ovarian mass larger than 5 cm, sudden onset during exertion, nausea and vomiting, unilateral adnexal tenderness, tachycardia. Against: none decisive. Test: pelvic ultrasound with Doppler, then surgical evaluation. Urgency: now.
2. Ruptured or hemorrhagic cyst. For: known mass, sudden onset, adnexal tenderness. Against: stable blood pressure, no signs of peritonitis. Test: pelvic ultrasound, hemoglobin. Urgency: today.
3. Pelvic inflammatory disease. For: sexually active. Against: no fever, no cervical motion tenderness, no discharge, sudden onset. Test: NAAT for gonorrhea and chlamydia. Urgency: today.
4. Appendicitis. For: lower abdominal pain, nausea. Against: left-sided, sudden onset without migration. Test: imaging if ultrasound is nondiagnostic. Urgency: today.
5. Ureteral stone. For: sudden severe pain, vomiting. Against: no flank pain, no hematuria reported, pelvic findings. Test: urinalysis. Urgency: today.
6. Endometrioma. For: adnexal mass. Against: no history of cyclic pain; old imaging showed a dermoid. Test: ultrasound. Urgency: not urgent alone.
7. Constipation. For: common. Against: normal bowel movement, severity, adnexal findings. Test: none. Urgency: low.
Why Torsion Is First
Torsion occurs when an ovary, often enlarged by a mass, twists on its supporting ligaments, cutting off venous and then arterial flow. Dermoid cysts and other benign masses of about 5 cm or more are the most common predisposing lesions, and sudden onset, often with exertion, and nausea or vomiting are typical (Huchon & Fauconnier, 2010). Ovarian viability declines over hours, so the priority is to decide quickly rather than to wait for certainty. A hemorrhagic cyst may be as likely, but it is usually managed without surgery, and missing it for a few hours costs less.
Why Normal Doppler Flow Would Not Remove Torsion
Doppler ultrasound can show absent flow in a torsed ovary, which strongly supports the diagnosis. But normal flow does not exclude it: the ovary has a dual blood supply, torsion may be partial or intermittent, and venous flow is obstructed before arterial flow. A substantial proportion of surgically confirmed torsions have had normal Doppler flow on preoperative imaging (Huchon & Fauconnier, 2010). An enlarged ovary with a mass in a woman with this history calls for surgical evaluation even if flow is seen.
The Missed Follow-Up
The old report recommended gynecologic follow-up of a 6 cm dermoid. Dermoids rarely resolve on their own, and larger ones carry a risk of torsion; surgical removal is often recommended, particularly for symptomatic or larger lesions (American College of Obstetricians and Gynecologists [ACOG], 2016). The missed follow-up does not change today's plan, but it is recorded, and the practice's result-tracking process will be reviewed so that incidental findings with recommended follow-up are not lost.
What She Was Told
Ms. [K.] was told plainly that the most important possibility is that her ovary has twisted around the cyst seen eight months ago, that this can cut off its blood supply, and that the best chance of saving the ovary is to be seen by the gynecology team today. She asked whether she would lose the ovary. The answer was that, when torsion is treated quickly, surgeons usually untwist the ovary and remove the cyst while keeping the ovary, and that even an ovary that looks dark at surgery often recovers. She asked whether she could drive herself; she could not, and her partner was called to take her, since an ambulance was not needed with stable vital signs and the hospital ten minutes away.
The Handoff
The emergency department and the on-call gynecologist received a direct call before she left: a 29-year-old with sudden left pelvic pain during exercise, vomiting, tachycardia and left adnexal tenderness, a known 6 cm dermoid on imaging eight months ago, and a negative urine hCG; concern for ovarian torsion; requesting urgent pelvic ultrasound with Doppler and gynecologic evaluation. The old report was sent with her. A call like this changes what happens on arrival: she is triaged as a possible surgical emergency rather than as abdominal pain waiting for a room.
If the Ultrasound Shows Something Else
If imaging shows a hemorrhagic cyst without torsion and her pain settles, she may be managed with analgesia and observation, with the dermoid scheduled for elective removal. If it shows free fluid with a falling hemoglobin, a ruptured cyst with bleeding would need close monitoring or surgery. Whatever the result, the dermoid now has a plan, which it lacked for eight months.
Disposition
Same-day emergency referral to the hospital with gynecology notified, for pelvic ultrasound with Doppler, a complete blood count, and surgical evaluation. Nothing by mouth. Antiemetic and analgesia given before transfer. Imaging choice follows the ACR guidance for acute pelvic pain in women of reproductive age, which places pelvic ultrasound first (American College of Radiology, 2018).
References
American College of Obstetricians and Gynecologists. (2016). Practice Bulletin No. 174: Evaluation and management of adnexal masses. Obstetrics & Gynecology, 128(5), e210-e226. https://doi.org/10.1097/AOG.0000000000001768
American College of Radiology. (2018). ACR Appropriateness Criteria: Acute pelvic pain in the reproductive age group. https://acsearch.acr.org/list
Huchon, C., & Fauconnier, A. (2010). Adnexal torsion: A literature review. European Journal of Obstetrics & Gynecology and Reproductive Biology, 150(1), 8-12. https://doi.org/10.1016/j.ejogrb.2010.02.006
How this NU576 Unit 4 example is structured
Two axes govern the ranking, and the paper names both before the table: how likely each cause is on this history, and how much harm follows from missing it. Torsion outranks a hemorrhagic cyst on the second axis even though cyst rupture may be as probable, because ovarian viability declines over hours. Each row then earns its position through findings drawn from the presentation, so the known mass larger than five centimeters, the exertional onset and the vomiting are cited where they apply. Beneath the table, a brief paragraph explains why a normal Doppler signal would not remove torsion from consideration. The excluded block sits apart, so the reader sees that ectopic pregnancy was considered and ruled out. References close the paper, including the ACR Appropriateness Criteria for acute pelvic pain, cited with its revision year.
Get an NU576 Unit 4 example written to your instructions
Whatever presentation your NU576 prompt supplies, the returned differential tests for pregnancy first, then ranks causes on likelihood and on the cost of missing each one. Attach the case text and your section's rubric. Nobody pays for a first request, which reaches you inside 24-48h with an invented patient at its center. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
NU576 Unit 4 questions, answered
How many diagnoses should a pelvic pain differential include?
Enough to show the dangerous causes were considered, typically five to eight. Each entry should carry findings for and against drawn from the case, so a shorter list with real reasoning scores better than a long one without it. Keep excluded diagnoses visible in their own block instead of deleting them.
Why rank torsion first if a cyst is more likely?
Because a differential orders by danger as well as probability, and delay in torsion can cost the ovary. Many rubrics reward papers that name this rule explicitly. If your case points more strongly toward another cause, the ranking may change, but the reasoning about time-critical diagnoses should still appear in the paper.
Should the paper include medication for pain?
Only if your prompt asks for management. A primary care differential for suspected torsion usually ends with emergency referral rather than a prescription. If analgesia is required, name the class, bracket any agent and dose, and cite the reference, since graders may question a regimen that seems to delay transfer.