A case report abstract is a structured summary in four parts: Introduction, Case Presentation, Discussion and Conclusion. It names the condition, gives the patient's age, sex and presenting problem, states the diagnosis and what was done, reports the outcome with a timeframe, and ends with the lesson the case teaches.
It is not the research abstract with different labels. A research abstract earns trust with design and statistics; a case report abstract earns it with clinical detail: values, doses, intervals. The Background-Methods-Results-Conclusion template produces a study with no data in it.
How a case report abstract differs from a research abstract
A research abstract summarises a study. A case report abstract summarises one patient's course, and the reader is deciding one question: does this change what I do on Monday?
| Element | Research abstract | Case report abstract |
|---|---|---|
| Opening | Aim, hypothesis or gap in the field | Why this single case is worth reading |
| Second section | Methods: design, setting, participants | Case Presentation: patient, findings, treatment |
| Evidence | Effect estimates, confidence intervals, p-values | Named tests with values, drugs with doses |
| Conclusion | An inference intended to generalise | A bounded lesson, offered as a prompt not proof |
A case report abstract has no Methods section: there is no method beyond observing and describing. A Methods heading left in place is a section with nothing under it, and a sign the template was copied rather than chosen.
What belongs in each section of a case report abstract
Introduction: two sentences, and the second carries the weight
Sentence one places the condition. Sentence two states what this case adds: an unrecognised presentation, an unexpected complication, a diagnostic trap, an unpredicted response. Skip the textbook definition.
Case Presentation: the longest section, and the one with numbers
The Case Presentation carries seven things:
- Age, sex and relevant comorbidity.
- The presenting concern and its duration.
- Findings that changed the differential.
- Investigations by name, with values and units.
- The diagnosis and how it was reached.
- The intervention with dose and route.
- The outcome with an interval attached.
Discussion: one or two sentences that explain the course
The Discussion inside an abstract is not a compressed literature review. Name the mechanism or decision point that made this case behave as it did.
Conclusion: one sentence a clinician could act on
Write the instruction, not the sentiment. "Measure thyroid function in any adult with hypokalaemic paralysis" is a conclusion. "This case highlights the importance of a multidisciplinary approach" fits every case report ever written, so it carries no information.
A case report abstract template, with a working word allocation
A structured abstract has no universal word limit; take the figure from the journal you are submitting to. Where none is given, 250 words is a workable target: one idea per sentence. The allocation below is arithmetic for 250, not a rule.
| Section | What it must contain | Words |
|---|---|---|
| Introduction | The condition in context, then what this case adds | 30-40 |
| Case Presentation | Patient, findings with values, diagnosis, intervention with dose, outcome with interval | 120-150 |
| Discussion | Mechanism or decision point, and what to notice | 40-50 |
| Conclusion | One statement a clinician can act on | 20-30 |
A bracket you cannot fill from the notes is a gap in the case record, better found now than at review.
Introduction: [Condition] is [one clause of context]. We report [the feature that makes this case reportable: an unusual presentation, a complication of X, an unexpected response to Y].
Case Presentation: A [age]-year-old [sex] presented with [main concern] of [duration]. Examination showed [findings that changed the differential]. [Named investigation] was [value with units]; [named investigation] was [value]. A diagnosis of [diagnosis] was made on [basis]. The patient received [drug or procedure, dose, route, duration]. [Outcome] within [interval]. At [follow-up interval] the patient was [status].
Discussion: [Mechanism, or the decision point that explains the course]. [What a reader should notice, in one clause].
Conclusion: [Action a clinician can take: consider X in patients with Y; check Z before doing W].
The same case abstract, written weakly and then written well
Both versions describe one illustrative case, a composite, not a real patient.
Weak version, 90 words
Introduction: Hypokalaemia is a common electrolyte disturbance with many causes and varied presentations. It is important for clinicians to be aware of it.
Case Presentation: We present an interesting and rare case of a young male patient who attended our hospital with weakness. Investigations were carried out and revealed significant abnormalities. He was managed appropriately, improved, and was discharged in a stable condition.
Discussion: The relevant literature is reviewed and discussed.
Conclusion: This case highlights the importance of considering rare causes and of a multidisciplinary approach. Further studies are needed.
Strong version, 193 words
Introduction: Thyrotoxic periodic paralysis is an uncommon cause of acute flaccid weakness and reverses once the underlying thyrotoxicosis is treated. We report a case in which paralysis was the first and only manifestation of thyrotoxicosis, with no classical thyrotoxic features at presentation.
Case Presentation: A 34-year-old man presented with sudden painless weakness of both legs on waking, several hours after a high-carbohydrate meal. Power was 2/5 in the lower limbs and 4/5 in the upper limbs, with absent deep tendon reflexes and no sensory loss. Serum potassium was 2.1 mmol/L, thyroid-stimulating hormone was undetectable and free thyroxine was raised. There was no goitre, tremor or weight loss. Potassium was replaced cautiously (10 mmol/hour intravenously, 40 mmol in total) with propranolol 40 mg orally, and power returned to 5/5 within 12 hours without rebound hyperkalaemia. Carbimazole was started, and at six months he was euthyroid with no recurrence.
Discussion: Thyroid function was requested because of the hypokalaemic paralysis itself rather than because of clinical suspicion, and that is what made the diagnosis reachable on the first admission.
Conclusion: Measure thyroid function in any adult presenting with hypokalaemic paralysis, even when thyrotoxic features are absent.
The weak version is well formed and empty:
| Weak phrase | What the reader cannot tell | What the strong version gives |
|---|---|---|
| an interesting and rare case | Rare compared with what | The unusual feature, stated once |
| revealed significant abnormalities | Which test, which value | Potassium 2.1 mmol/L, undetectable TSH |
| was managed appropriately | Drug, dose, route | Cautious potassium, propranolol 40 mg |
| improved and was discharged | How fast, how durably | 5/5 in 12 hours, euthyroid at six months |
Six mistakes that cost a case report its readers
- Opening with a definition. The first sentence is where a reader decides whether to read the second; a prevalence statistic wastes it.
- Withholding the numbers. A reader sent into the full text for a withheld value may not go.
- Verbs with no object. Managed, treated, investigated, corrected. Each needs a named drug, dose, route or test.
- No timeline. Onset, diagnosis, response, follow-up. A case report without intervals is an anecdote.
- A conclusion that fits any case. If it survives being pasted into another report, it says nothing about yours.
- Identifiers left in. Admission dates, a named institution beside a rare condition, an unusual occupation. The abstract circulates in the record, so de-identify it first.
What CARE, EQUATOR and journal instructions ask of the abstract
The reporting guideline for case reports is CARE, which also has an extension for surgical case reports, SCARE. Item 3 of the CARE checklist covers the abstract, asking for an introduction saying what is unique about the case, the patient's main concerns and important clinical findings, the main diagnoses, interventions and outcomes, and a conclusion giving the take-away lesson. CARE accepts a structured or an unstructured abstract and lists no separate discussion element, so the four labels above are a convention that makes each CARE requirement visible, not the guideline's own wording. CARE is listed in the EQUATOR Network library, and our author guidelines ask you to match the manuscript to the relevant checklist before submitting.
The ICMJE Recommendations ask that an abstract contain no information absent from the article body. And the abstract is the part of your article that circulates on its own: it is carried in the article's JATS XML metadata record and is often all a reader sees in search results. A vague abstract is what that record carries, and the record is what a reader meets first.
A final check before you paste the abstract into your submission
- Four labelled sections, and no Methods heading.
- Age and sex in the first sentence of the Case Presentation.
- One investigation with value and units, one intervention with dose or route.
- Two intervals, one of them follow-up.
- A conclusion no other case report could borrow.
- No dates, institutions or identifiers; every number matching the full text.
Writing the abstract forces you to decide what the case is for. If you are still assembling the report, how to write and publish a case report using the CARE checklist covers the full structure, and how to write a strong abstract covers the research version. Whether it is found depends on the title and keywords above it: choosing keywords and a title for discoverability. For requirements, see our article types page, then the submission page.