NU621 Unit 2 DQ 1: SLE, drug-induced lupus, fibromyalgia
For a 42-year-old woman diagnosed with SLE, differentiate the pathophysiology of chronic SLE from transient lupus-like syndrome, discuss the history and labs that diagnose and differentiate it, distinguish it from fibromyalgia, and provide patient education.
Editorial process
Last reviewed · August 14, 2026
The medication history is the whole first question
The vignette is engineered, and the engineered detail is hydralazine. It is one of the classic causes of drug-induced lupus, so the case invites you to consider a transient lupus-like syndrome — and then tells you the medication was changed years ago with no change in symptoms, which argues against it. Use that. The pathophysiological differentiation the prompt asks for runs as follows: chronic SLE is a systemic autoimmune disease in which loss of tolerance to nuclear antigens produces autoantibodies, immune complexes deposit in tissue, complement activates and multi-organ inflammation follows, with a relapsing course and genuine renal, neurological and haematological risk. Drug-induced lupus is a reaction to a specific agent — hydralazine, procainamide and others — in which the offending drug alters antigen presentation; it produces antihistone antibodies, spares the kidneys and central nervous system in most cases, and resolves within weeks to months of stopping the drug.
That difference drives the laboratory answer. Antinuclear antibody is sensitive but not specific and is positive in both; anti-double-stranded DNA and anti-Smith are the specific markers for SLE, and anti-dsDNA titres track disease activity and nephritis. Antihistone antibodies point toward the drug-induced form, and low complement C3 and C4 point toward active SLE. Add the tests that stage organ involvement rather than confirm the label: complete blood count for cytopenias, creatinine, urinalysis for proteinuria and casts, and antiphospholipid antibodies. Fibromyalgia then separates on evidence rather than on symptoms: it produces widespread pain, fatigue and sleep disturbance with no rash, no inflammatory markers, no autoantibodies, no organ damage and a normal examination for synovitis — and the two conditions coexist often enough that the real clinical error to guard against is assuming that one positive ANA result explains every symptom a patient in front of you happens to have.
Likely learning objectives
Inferred from the brief — check these against your own rubric.
- 01Contrast the mechanisms of idiopathic SLE and drug-induced lupus.
- 02Select and interpret the autoantibody panel that separates them.
- 03Distinguish an inflammatory autoimmune disease from a central pain syndrome.
- 04Translate the diagnosis into patient education a patient can act on.
Read the full question
Review every instruction before using the planning guidance that follows.
Course-wide instructions that accompany this question
ADDITIONAL INSTRUCTIONS FOR THE CLASS Discussion Questions (DQ) Initial responses to the DQ should address all components of the questions asked, include a minimum of one scholarly source, and be at least 250 words. Successful responses are substantive (i.e., add something new to the discussion, engage others in the discussion, well-developed idea) and include at least one scholarly source. One or two sentence responses, simple statements of agreement or “good post,” and responses that are off-topic will not count as substantive. Substantive responses should be at least 150 words. I encourage you to incorporate the readings from the week (as applicable) into your responses. Weekly Participation Your initial responses to the mandatory DQ do not count toward participation and are graded separately. In addition to the DQ responses, you must post at least one reply to peers (or me) on three separate days, for a total of three replies. Participation posts do not require a scholarly source/citation (unless you cite someone else’s work). Part of your weekly participation includes viewing the weekly announcement and attesting to watching it in the comments. These announcements are made to ensure you understand everything that is due during the week. APA Format and Writing Quality Familiarize yourself with APA format and practice using it correctly. It is used for most writing assignments for your degree. Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for APA paper templates, citation examples, tips, etc. Points will be deducted for poor use of APA format or absence of APA format (if required). Cite all sources of information! When in doubt, cite the source. Paraphrasing also requires a citation. I highly recommend using the APA Publication Manual, 6th edition. Use of Direct Quotes I discourage overutilization of direct quotes in DQs and assignments at the Masters’ level and deduct points accordingly. As Masters’ level students, it is important that you be able to critically analyze and interpret information from journal articles and other resources. Simply restating someone else’s words does not demonstrate an understanding of the content or critical analysis of the content. It is best to paraphrase content and cite your source. LopesWrite Policy For assignments that need to be submitted to LopesWrite, please be sure you have received your report and Similarity Index (SI) percentage BEFORE you do a “final submit” to me. Once you have received your report, please review it. This report will show you grammatical, punctuation, and spelling errors that can easily be fixed. Take the extra few minutes to review instead of getting counted off for these mistakes. Review your similarities. Did you forget to cite something? Did you not paraphrase well enough? Is your paper made up of someone else’s thoughts more than your own? Visit the Writing Center in the Student Success Center, under the Resources tab in LoudCloud for tips on improving your paper and SI score. Late Policy The university’s policy on late assignments is 10% penalty PER DAY LATE. This also applies to late DQ replies. Please communicate with me if you anticipate having to submit an assignment late. I am happy to be flexible, with advance notice. We may be able to work out an extension based on extenuating circumstances. If you do not communicate with me before submitting an assignment late, the GCU late policy will be in effect. I do not accept assignments that are two or more weeks late unless we have worked out an extension. As per policy, no assignments are accepted after the last day of class. Any assignment submitted after midnight on the last day of class will not be accepted for grading. Communication Communication is so very important. There are multiple ways to communicate with me: Questions to Instructor Forum: This is a great place to ask course content or assignment questions. If you have a question, there is a good chance one of your peers does as well. This is a public forum for the class. Individual Forum: This is a private forum to ask me questions or send me messages. This will be checked at least once every 24 hours.
Turn the brief into deliverables
- 01The underlying pathophysiologic mechanisms of chronic SLE.
- 02The mechanisms of transient lupus-like syndrome, and how they differ.
- 03The history and laboratory findings that diagnose and differentiate SLE.
- 04How you would differentiate SLE from fibromyalgia.
- 05Patient education for this patient.
- 06Current research, national guidelines and expert opinion cited in APA format.
Mechanism, labs, the fibromyalgia split, then education
What the vignette is signalling
Hydralazine, the eight-year course, and the unchanged symptoms after switching.
Chronic SLE mechanism
Loss of tolerance, autoantibodies, immune complexes, complement, multi-organ injury.
Drug-induced lupus mechanism
Offending agents, antihistone antibodies, organ sparing, resolution on withdrawal.
History and laboratory workup
The antibody panel, complement, and the tests that stage organ involvement.
SLE versus fibromyalgia
Objective findings, inflammatory markers and organ damage as the divide.
Patient education
Photoprotection, adherence, infection risk, pregnancy planning, flare recognition.
Criteria and autoantibody profiles
Recommended databases
- StatPearls, NCBI Bookshelf
- PubMed Central
- American College of Rheumatology
- MedlinePlus
Search sequence
- 1.Read the SLE entry for pathophysiology and the current classification criteria.
- 2.Look up the drug list for drug-induced lupus and the antihistone association.
- 3.Check what anti-dsDNA titres track and how complement is used.
- 4.Read a current account of fibromyalgia's diagnostic basis.
- 5.Draft the education points from this patient's own history.
Reference shortlist
These are authoritative starting points, not a ready-made bibliography. A qualified reviewer must confirm that each source fits the assignment and supports the claim beside which it is cited.
Nothing here is cleared for citation until you have read it.
- 01
Systemic Lupus Erythematosus
StatPearls, NCBI Bookshelf, US National Library of Medicine · 2023
Pathophysiology, classification criteria and the autoantibody profile.
- 02
Drug-Induced Lupus Erythematosus
StatPearls, NCBI Bookshelf · 2023
The offending agents, antihistone antibodies and resolution on withdrawal.
- 03
Fibromyalgia
StatPearls, NCBI Bookshelf · 2023
The diagnostic basis that separates it from an inflammatory disease.
- 04
Biochemistry, Antinuclear Antibodies (ANA)
StatPearls, NCBI Bookshelf · 2023
Why a positive ANA is sensitive but far from diagnostic.
Review before submission
Common mistakes
- Missing hydralazine in the medication history.
- Treating a positive ANA as diagnostic of SLE.
- Omitting antihistone antibodies, which are the drug-induced marker.
- Ordering only diagnostic labs and none that stage organ involvement.
- Separating fibromyalgia from SLE on symptoms rather than on objective findings.
- Giving generic education with no photoprotection or flare guidance.
Submission checklist
- Both mechanisms are described, not just SLE's.
- The medication history is used in the reasoning.
- ANA, anti-dsDNA, anti-Smith, antihistone and complement are interpreted.
- Organ-involvement testing is included.
- Fibromyalgia is excluded on objective grounds.
- Education covers sun protection, adherence, infection risk and flare warning signs.
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Written by
Aaron Bishop
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Aaron leads the EssayCrackers editorial desk. He works on how assignment briefs are read — what a rubric is actually asking for, and where students most often answer a different question than the one set.

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