Differential diagnosis

A peer response post analysing a colleague's differential diagnoses for an eleven-year-old with a right earache: rejecting conditions with reasons, naming the most likely one, and justifying it. This guide separates the findings that discriminate between otitis externa and otitis media from the ones that do not.

Choose one condition — pneumonia, COPD, Parkinson's, pancreatitis, cholecystitis, asthma, joint replacement or psoriasis — and build a maximum eight-slide case presentation covering CC, HPI, history, ROS and PE findings, differentials with criteria, tests and expected results, medications with doses and precautions, outcomes and referral triggers, and patient teaching materials.

Using the Aquifer case study, discuss the history pertinent to Mr Payne's genitourinary problem, describe the physical exam and diagnostic tools used and any you would add, list three differential diagnoses with reasoning and your final diagnosis, and set out the plan of care including drug therapy, education and follow-up.

The brief tells you the one structure that will fail: disease by disease. Two clinical facts do most of the discriminating, and both are about time.

Summarise the history and physical for a 19-year-old with two days of bilateral gritty, red, itchy, tearing eyes as if presenting to a preceptor, give at least three differentials with pathophysiology, argue each for and against from the findings, rank them, and justify any testing with evidence-based medicine.

A 15-year-old with nocturnal nonproductive cough, progressive exertional-to-continuous dyspnea and expiratory wheeze: name the chief complaint, rank three differentials with the presumptive diagnosis first, and build a guideline-based treatment plan.

A full chart case with two problems hiding in one groin: acute right scrotal pain in a sexually active 34-year-old, plus a months-old scaly rash — differentials ruled on data, diagnoses confirmed, and a guideline-cited plan.

A video-based case assignment: complete the SOAP note on the given history, then rule in and rule out your three highest differentials with peer-reviewed evidence, each worked through a full illness script.

Part one hides a question about race and medicine that most posts answer badly — ancestry shifts the prior probability, it does not remove a diagnosis, and saying that clearly is the difference between a good post and a careless one.

Two scenarios, and the second is where the marks are: fever, foul-smelling sputum by the cupful and exertional breathlessness are not a worse version of the first picture — they point somewhere else entirely.

Five questions that look like a checklist and are really one reasoning chain — and they are printed in an order you should not think in.

A discussion answering two cases: for a 49 year old assembly worker with worsening central low back pain radiating into both gluteal regions without leg pain and six months off work without improvement, building a differential list, saying what evidence would rule each in or out and what further history and examination would help; and for a 65 year old woman after a wrist fracture with a bone mineral density result indicating osteoporosis, explaining the difference between degenerative bone disease and osteoporosis with the pathology of each, the treatment options to discuss and the lifestyle changes to recommend.

Answer two cases: describe headache pathology and match an etiology to James's 15-year history of unilateral burning pain with tearing and rhinorrhoea, then build a plan of care and secondary prevention goals for Mr. Smith, three months after a stroke with no records available.

A Herzing NU 636 Unit 4 discussion requiring an abbreviated SOAP note for a 53-year-old woman who brought in outside lab work showing a TSH of 93, presenting with fatigue, unmotivation, fifteen pounds of weight gain, a mild asymmetric goitre, dry flaking skin and delayed Achilles reflex relaxation, with the plan supported by scholarly resources.

Select one pulmonary, cardiac, peripheral vascular or lymphatic system disorder, discuss its clinical characteristics, identify the laboratory, imaging and other diagnostic and screening tools that apply, and explain why each is appropriate to that condition.