PID and psoriasis case study questions: planning guide
Two linked pathophysiology cases: a 19-year-old with suspected PID whose microscopy already names an organism, and a psoriasis relapse where the trigger question and the drug-history question are quietly the same question. Both are graded on criteria-based reasoning, not recall.
Editorial process
Last reviewed · August 11, 2026
What are the PID and psoriasis cases actually testing?
Case 1 gives you more data than the questions admit, and the first question is testing whether you know what a clinical diagnosis of PID formally requires. 'Can a diagnosis be made based on the clinical manifestations at this point?' is not asking for your instinct — it is asking you to hold Ms. P.C.'s presentation against the CDC's diagnostic approach for PID, which deliberately sets a low threshold of presumptive treatment for sexually active young women with lower abdominal or pelvic pain when no other cause is identified. Your answer has to engage that 'why or why not' on criteria: which of her findings meet the presumptive standard, and what additional findings (cervical motion tenderness, adnexal tenderness on exam) the vignette has not yet established. Answer it in that shape — criteria met, criteria pending — and the 'why or why not' writes itself.
Question 2 then pivots from syndrome to organism: the microscopy panel is written to be decoded — no yeast, no flagellates, positive white cells, and gram-negative intracellular diplococci — and your job is to say what that pattern rules in and out, and why a co-infection still cannot be excluded on microscopy alone. Question 3 is a criteria question again: the CDC lists specific indications for hospitalisation and parenteral therapy in PID, and a defensible answer cites which of them Ms. P.C. does or does not meet. Case 2 rewards reading the history as a timeline. K.B.'s disease has changed category — from limited plaque psoriasis responsive to topicals to a generalized outbreak across arms, legs, scalp, trunk and groin — and questions 2 and 3 both turn on that category shift: body-surface involvement this extensive makes topical monotherapy impractical and pushes treatment to phototherapy or systemic agents.
The trigger question and the medication question are connected: her only medications are ibuprofen and Rolaids, and NSAIDs sit on the established list of drugs that can exacerbate psoriasis — which also matters prospectively, because NSAIDs interact with methotrexate, the classic systemic choice for generalized disease. Spotting that the drug history answers both question 1 and question 4 is the reading this case is built to reward. Rolaids matters for a different reason: antacids change gastric pH and can alter the absorption of oral systemic agents, so the question is really asking whether you understand why a complete medication history precedes any prescribing decision. Answer question 4 prospectively — what the provider must rule out before writing the next prescription — and it stops being a trivia question about two over-the-counter products.
Likely learning objectives
Inferred from the brief — check these against your own rubric.
- 01Apply the CDC's presumptive diagnostic approach for PID to a specific presentation, distinguishing findings present in the vignette from findings still needed on examination.
- 02Interpret a vaginal-discharge microscopy panel — the significance of gram-negative intracellular diplococci and of the negative findings around them — and state its limits for excluding co-infection.
- 03Judge a PID hospitalisation decision against the CDC's stated criteria for parenteral therapy rather than severity instinct.
- 04Explain why extent of body-surface involvement changes psoriasis treatment class, and how an NSAID history bears on both trigger analysis and systemic-therapy safety.
Read the full question
Review every instruction before using the planning guidance that follows.
Turn the brief into deliverables
- 01Answers to the three stated questions for Case 1 (PID diagnosis, infection type, hospitalisation decision), each with the 'why or why not' the questions demand.
- 02Answers to the four stated questions for Case 2 (trigger, why topicals are not an option, preferred treatment, significance of the ibuprofen and Rolaids history).
- 03Criteria-based justification throughout — both cases phrase their questions to require reasons, not verdicts.
How should the seven case questions be worked through?
Case 1: presentation against the PID diagnostic standard
Line up Ms. P.C.'s two-day history — lower abdominal pain, nausea, emesis, malodorous discharge, unprotected intercourse — against the CDC's presumptive diagnostic approach, and state explicitly which examination findings the vignette has not yet supplied.
Case 1: decoding the microscopy panel
Work through the four microscopy lines in order — what the negative yeast and flagellate findings exclude, what leukocytes indicate, and what gram-negative intracellular diplococci are pathognomonic for — then state why microscopy cannot rule chlamydia in or out.
Case 1: the hospitalisation decision
List the CDC's indications for parenteral PID therapy — inability to exclude surgical emergency, pregnancy, failed or intolerable oral therapy, severe illness with high fever or tubo-ovarian abscess — and test the vignette against each.
Case 2: what changed in K.B.'s disease
Contrast the presentation at 35 (limited, elbows and lower legs, topical-responsive) with the current generalized outbreak, and identify candidate triggers from the history — with her NSAID use as the documented, evidence-linked one.
Case 2: treatment class and the drug-history payoff
Explain why generalized surface involvement removes topical monotherapy from the table, name the preferred class for this presentation, and connect the ibuprofen and Rolaids history to interaction and absorption concerns with the systemic options.
Which CDC and NIH sources anchor these two cases?
Recommended databases
- CDC (STI treatment guidelines)
- NIAMS
- PubMed Central
Search sequence
- 1.Read the CDC PID overview for the diagnostic framing, then the 2021 STI Treatment Guidelines PID section for the presumptive-treatment threshold and the parenteral-therapy indications Case 1's questions 1 and 3 require.
- 2.Note the guideline's testing recommendations — gonorrhoea, chlamydia and HIV — to support the co-infection point in question 2.
- 3.Read the NIAMS psoriasis page for the trigger list and treatment ladder, matching each rung to K.B.'s disease extent.
- 4.Use the PMC psoriasis review for the pathophysiology depth (immune mechanism, drug exacerbation) that separates an adequate Case 2 answer from a strong one.
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
About Pelvic Inflammatory Disease (PID)
Centers for Disease Control and Prevention · 2024
The diagnostic framing for Case 1's first question — how PID is identified clinically and why the threshold is deliberately low. Pair with the treatment guidelines for the criteria lists.
- 02
Pelvic Inflammatory Disease (PID) — STI Treatment Guidelines
Centers for Disease Control and Prevention · 2021
The authoritative source for presumptive diagnostic criteria and the specific indications for hospitalisation and parenteral therapy — questions 1 and 3 should cite this document rather than a textbook summary.
- 03
Psoriasis Symptoms, Causes, & Risk Factors
National Institute of Arthritis and Musculoskeletal and Skin Diseases · 2023
The trigger list (including medications) and the severity-tiered treatment overview for Case 2 — the source that legitimises moving K.B. off topicals as disease extent grows.
- 04
Advancements in understanding and treating psoriasis: a comprehensive review of pathophysiology, diagnosis, and therapeutic approaches
PMC / National Library of Medicine · 2025
Peer-reviewed depth on psoriasis immunopathology and systemic therapy for the 'preferred treatment' answer; use it to name agents and mechanisms rather than classes alone.
Review before submission
Common mistakes
- Answering Case 1's first question with a diagnosis instead of an analysis of whether the diagnostic criteria are met at this point — the phrase 'at this point' is doing real work in that question.
- Reading the microscopy as settling the infection type completely, when a negative microscopy for one organism cannot exclude chlamydial co-infection — the question offers 'mixed' as an option for a reason.
- Deciding hospitalisation on how ill the patient sounds rather than against the CDC's listed indications for parenteral PID therapy.
- Treating K.B.'s two questions about drugs (trigger; why the provider must know about ibuprofen and Rolaids) as unrelated, when the NSAID thread connects trigger, treatment choice and interaction risk.
- Explaining the topical ruled-out question by potency or side-effects alone, missing the practical point the vignette states: the outbreak is generalized across large regions, and surface area is the disqualifier.
Submission checklist
- All seven questions answered, under headings matching the two cases.
- Case 1 answers cite the CDC diagnostic and hospitalisation criteria by name, not from memory.
- The microscopy interpretation states what each negative finding rules out as well as what the positive finding suggests.
- Case 2's treatment answer names a class (phototherapy or a specific systemic agent) and ties it to the generalized distribution described in the vignette.
- The ibuprofen answer covers both the exacerbation link and the prospective interaction with systemic therapy.
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Written by
Aaron Bishop
MA, Education
assignment interpretation and research-methods coaching across disciplines
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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Dr. Nathan Cole
PhD, Rhetoric & Composition
Argumentation and thesis development
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