Think. Diagnose. Learn.
Real clinical cases. Sharpen your reasoning and build confidence for real life.
Saturn Dx is a free medical diagnosis game made by Saturn Medic for medical students, pharmacy students and anyone who enjoys solving clinical puzzles. Read a short patient story, type your diagnosis, and unlock one new hint every time you get it wrong. It is a clinical diagnosis game you can finish in two minutes between lectures, and every case ends with a clear explanation of why the answer fits.
What Is a Medical Diagnosis Game?
A medical diagnosis game turns clinical reasoning into a challenge. Instead of memorising long lists, you start with a history, think about the likely causes, and narrow them down as new findings appear. This is how doctors work at the bedside, a process known as building a differential diagnosis. Saturn Dx lets you practise that skill with realistic teaching cases, with no risk to any patient.
How to Play Saturn Dx
Choose a body system or press Random
Pick one of the seven systems below, or press Random Case to mix them all. You can also set the difficulty to Easy, Medium or Hard, so beginners and senior students both get a fair challenge.
Read the case and name the diagnosis
Each case begins with a short history. Type your diagnosis and the game suggests matching names as you type. If you are wrong, the next hint unlocks: examination findings first, then laboratory results, then imaging or other investigations.
Score points and learn why
The fewer hints you need, the more points you earn. When the case ends you see the correct diagnosis, a short explanation and every clue together, so each attempt teaches you something even when you miss.
The 7 Systems in Our Clinical Diagnosis Game
- Cardiovascular: chest pain, heart failure, rhythm problems and vascular emergencies.
- Respiratory: breathlessness, cough, chest infections and lung disease.
- Gastrointestinal: abdominal pain, bleeding, liver and bowel conditions.
- Endocrinology: thyroid, adrenal, pituitary and diabetes-related presentations.
- Hematology: anemia, bleeding and clotting disorders, blood cancers.
- Renal System: kidney and urinary tract problems, including nephrology and urology.
- Infectious System: fever, sepsis and bacterial, viral and parasitic infections.
Tips to Solve Cases Faster
- Start with the age, sex and main symptom, and list three possible causes before you type anything.
- Look for the one clue that does not fit your first idea; it usually points to the real diagnosis.
- Read the explanation after every case, even when you were right, because it shows how experts reason through the same clues.
- Replay the same system on Hard once Easy feels comfortable. A clinical diagnosis game rewards repetition.
Why Play a Medical Diagnosis Game as a Student?
Passive reading rarely trains reasoning. A medical diagnosis game asks you to commit to an answer, gives you feedback straight away and lets you try again. That cycle of thinking, testing and correcting is what makes clinical knowledge stick. Short rounds also fit a busy timetable, so you can practise a little every day instead of cramming before exams.
The game also builds good habits: collect the clues, weigh the alternatives and avoid fixing on the first idea that comes to mind. Accurate diagnosis sits at the heart of safe care, and organisations such as the World Health Organization treat patient safety as a global priority.
Keep Studying with Saturn Medic
Saturn Dx works best together with the rest of the platform. After a case, test your knowledge in the Saturn Medic Question Bank, which offers practice questions organised by subject. Then revise the key facts with our medical flashcards, built for quick, repeated review. When a case introduces a condition you want to understand from the patient’s point of view, the MedlinePlus health library is a clear, reliable place to read more.
Medical Diagnosis Game FAQ
Is this medical diagnosis game free?
Yes. Saturn Dx is free to play, and there is no limit on how many cases you can try.
Do I need an account to play?
No. You can start immediately, and your progress is saved in your browser on the same device.
Are the cases real patients?
No. The cases are original teaching scenarios written to match standard textbook presentations. Our team reviews each case before it goes live, and no real patient records are used.
Is Saturn Dx medical advice?
No. Saturn Dx is for education and entertainment only. If you have a health concern, please speak to a qualified doctor.
Renal diagnosis cases on Saturn Dx help you practise reasoning about kidney and urinary tract problems, including nephrology and urology. This free nephrology diagnosis game gives you 122 clinical cases, with one new hint after every wrong answer.
How our renal diagnosis cases work
Pick a difficulty (Easy, Medium or Hard) and start a case. You see the patient presentation first. Type your diagnosis, and if it is wrong the next hint unlocks: examination findings, then laboratory results, then imaging or other investigations. The fewer hints you need, the more points you earn, and at the end you read a short explanation of why the diagnosis fits.
Why practise renal diagnosis cases?
Kidney and urinary conditions show up as changes in urine, swelling, high blood pressure, flank pain, abnormal blood chemistry or a fall in urine output. Because the kidneys regulate fluid, salt, acid and several hormones, a problem there can affect the whole body. These cases train you to place the problem before, inside or after the kidney, and to read urine and blood results with confidence.
What you learn from each case
Every one of these renal diagnosis cases ends with the same three things: the correct diagnosis, a short explanation of the reasoning, and the full list of clues so you can see where your thinking went right or wrong. Over time you start to recognise typical patterns in renal system medicine, you remember the key investigations for each condition, and you become faster at ruling out the dangerous causes first. Use the difficulty setting to begin with classic presentations and then move on to harder, more subtle cases.
Topics in the renal system diagnosis game
This area of medicine covers presentations such as:
- acute kidney injury
- chronic kidney disease
- glomerulonephritis and nephrotic syndrome
- electrolyte and acid-base disorders
- urinary tract infection and pyelonephritis
- kidney stones
- benign prostatic hyperplasia and prostate cancer
- kidney and bladder tumours
How to approach a renal system case
Use the classic three-part approach: is the problem before the kidney (poor blood flow), in the kidney itself, or after it (an obstruction)? Look at the urine output, blood pressure, fluid status and the urine test. Pay attention to the creatinine, potassium and acid-base results when they appear, as they often separate acute from chronic disease.
- Write down two or three possible diagnoses before you type an answer.
- Use every hint to rule something in or out, not only to confirm your first idea.
- Read the explanation after each case, even when you were right.
Trusted resources to read next
After a case, deepen your understanding with National Kidney Foundation for patient and professional kidney resources, and MedlinePlus kidney diseases for plain-language summaries of renal conditions.
Keep studying with Saturn Medic
Test yourself with the Saturn Medic Question Bank, revise key facts with our medical flashcards, or return to the medical diagnosis game home page. You can also practise another system:
- Cardiovascular diagnosis cases
- Respiratory diagnosis cases
- Gastrointestinal diagnosis cases
- Endocrinology diagnosis cases
- Hematology diagnosis cases
- Infectious System diagnosis cases
Renal System diagnosis game FAQ
Are these renal diagnosis cases free?
Yes. Every renal system case on Saturn Dx is free to play, and there is no limit on how many you can try. There are currently 122 renal system cases.
How many hints do I get in a renal system case?
Each case has between four and six clues. You start with the history, and every wrong answer unlocks the next hint, such as examination findings, laboratory results or imaging.
Are the renal system cases real patients?
No. They are original teaching scenarios written to match standard textbook presentations. Our team reviews each case before it goes live, and no real patient records are used.
All 122 renal system cases
- Renal System case #116 - A 4-year-old boy has had swelling of his face and legs for 5 days.
- Renal System case #117 - A 38-year-old man has had vague aching in both loins for a year.
- Renal System case #118 - A 33-year-old man developed sudden severe pain in his right loin 2 hours ago.
- Renal System case #171 - A 26-year-old woman has had 2 days of passing urine more often than usual.
- Renal System case #172 - A 67-year-old man noticed bright red urine once, with no pain.
- Renal System case #173 - A 7-year-old boy has had puffiness around the eyes in the mornings and has passed dark urine for 2 days.
- Renal System case #174 - A 72-year-old man had emergency surgery for a perforated bowel 3 days ago and has passed very little urine since.
- Renal System case #175 - A 22-year-old man noticed dark red urine on the second day of a head cold.
- Renal System case #176 - A 52-year-old man has had 2 months of ankle swelling and frothy urine.
- Renal System case #177 - A 68-year-old woman has blood pressure that has become hard to control and is now taking three antihypertensive drugs.
- Renal System case #178 - A 68-year-old man has had a poor urinary stream, hesitancy and getting up three times each night to pass urine for two years.
- Renal System case #179 - A 24-year-old man has had two weeks of tiredness and cough, with a little blood in his sputum.
- Renal System case #180 - A 17-year-old boy was found to have blood in his urine at a school medical examination.
- Renal System case #251 - A 29-year-old woman has felt feverish with shaking chills for 2 days, after several days of burning when passing urine.
- Renal System case #252 - A 72-year-old man has had a weak urinary stream and has been getting up twice each night to pass urine for about a year.
- Renal System case #253 - A 58-year-old man with diabetes for 15 years has noticed ankle swelling and frothy urine over the past year.
- Renal System case #254 - A 66-year-old man with long-standing hypertension has been tired and breathless on exertion for several months, and lately has itching and…
- Renal System case #255 - A 78-year-old woman with heart failure has had 3 days of vomiting and diarrhoea and is drinking little. She takes a loop diuretic and an…
- Renal System case #256 - A 4-year-old boy had 3 days of bloody diarrhoea and cramping after a family barbecue. The fever settled, but he is now pale and passing…
- Renal System case #257 - A 24-year-old woman has been increasingly tired for six months, with aching hands and wrists, and now has swollen ankles.
- Renal System case #258 - A 54-year-old man has felt feverish and nauseated for several days; he is still passing normal amounts of urine.
- Renal System case #259 - A 22-year-old man has had a recurrent dull ache in the left loin for two years.
- Renal System case #260 - A 28-year-old woman attending an antenatal clinic reports repeated urinary infections in childhood.
- Renal System case #261 - A 68-year-old smoker with hypertension has felt unwell with a low-grade fever and aching feet for two weeks.
- Renal System case #262 - A 45-year-old man has had 4 months of urinary frequency and burning on passing urine, with night sweats and weight loss.
- Renal System case #399 - A 62-year-old man who smokes has had three painless episodes of visible blood in his urine over 2 months, with a dull ache in the right…
- Renal System case #400 - A 28-year-old man noticed a painless swelling of one testis 6 weeks ago, with a mild dragging ache.
- Renal System case #401 - A 71-year-old man who has had months of hesitancy and a weak stream suddenly cannot pass urine after a night of heavy drinking and has…
- Renal System case #402 - A 74-year-old man complains of constant dribbling of urine, worse at night, and has wet his bed several times this month.
- Renal System case #403 - A 68-year-old woman has a sudden, overwhelming need to pass urine and sometimes does not reach the toilet; she goes about 12 times by day…
- Renal System case #404 - A 26-year-old woman has leaked urine continuously, day and night, since a long and difficult first delivery 3 weeks ago, although she also…
- Renal System case #405 - A 58-year-old man with long-standing diabetes who smokes cannot get or keep an erection firm enough for intercourse, and has had no morning…
- Renal System case #406 - A 7-year-old boy has had colicky abdominal pain and sore knees for 3 days, starting 10 days after a sore throat.
- Renal System case #407 - A 24-year-old sexually active man has had a painful, swollen left scrotum for 2 days, with burning on passing urine and a urethral…
- Renal System case #408 - A 22-year-old army recruit became very sore and weak after a long forced march in hot weather; two days later he passes little urine, which…
- Renal System case #409 - A 24-year-old man has had puffy eyes and swollen ankles for 3 weeks, and his urine has become frothy.
- Renal System case #410 - A 22-year-old man has had his third episode of severe right loin pain in 4 years; his father also had kidney stones when young.
- Renal System case #411 - A 33-year-old woman has passed small stones three times since her twenties and has had two urinary infections; kidney function has always…
- Renal System case #412 - A 58-year-old woman with poorly controlled diabetes has had 4 days of fever, left loin pain and vomiting, and is no better after 48 hours…
- Renal System case #413 - A 48-year-old woman with recurrent urinary infections and previous stone surgery has had a year of low-grade fever, weight loss and a dull…
- Renal System case #414 - A 52-year-old woman with long-standing diabetes who takes diclofenac daily for back pain develops sudden right renal colic and passes a…
- Renal System case #415 - A 60-year-old man with diabetes, recently treated for a urinary infection, has had 2 weeks of fever, sweats and worsening right loin pain.
- Renal System case #416 - A 67-year-old man with 3 months of back pain and tiredness is admitted with thirst, constipation and passing little urine after starting an…
- Renal System case #417 - A 50-year-old man with long-standing kidney impairment has had 6 months of hip and back pain and weakness climbing stairs.
- Renal System case #418 - A 55-year-old man has had 2 months of dull, poorly localised back and flank discomfort, malaise and weight loss.
- Renal System case #419 - A 28-year-old woman has had years of muscle cramps, fatigue and occasional carpopedal spasm, and craves salty food; she takes no regular…
- Renal System case #420 - A 32-year-old woman with dry eyes and a dry mouth for years presents with muscle weakness and has passed two kidney stones.
- Renal System case #421 - A 30-year-old woman with epilepsy since childhood and mild learning difficulty presents with sudden severe left flank pain and collapse.
- Renal System case #422 - A 41-year-old man, 6 weeks after a deceased-donor kidney transplant on tacrolimus, mycophenolate and prednisolone, passes less urine and…
- Renal System case #423 - A 34-year-old man has noticed tender enlargement of both breasts for 5 months and a fall in sex drive.
- Renal System case #682 - A 74-year-old woman has had two weeks of nausea, lethargy and increasing confusion. She fell twice at home last week.
- Renal System case #683 - A 31-year-old man with a long psychiatric illness is brought in after a first generalised seizure. Staff report he drinks 8-10 litres of…
- Renal System case #684 - An 86-year-old woman with advanced dementia in a care home has become drowsy over three days. Staff say she has been refusing drinks since…
- Renal System case #685 - A 68-year-old man with diabetes and stage 3 chronic kidney disease feels weak and has palpitations. Ramipril was started 10 days ago and he…
- Renal System case #686 - A 70-year-old man with heart failure has muscle cramps, weakness and palpitations. His furosemide dose was doubled last month.
- Renal System case #687 - A 26-year-old man has had five days of profuse watery diarrhoea. He is now very tired and breathing deeply.
- Renal System case #688 - A 61-year-old man is admitted with two days of fever, abdominal pain and increasing drowsiness. He has not taken any new medicines and does…
- Renal System case #689 - A 58-year-old man with a long history of duodenal ulcer has had three weeks of repeated large-volume vomiting, mostly of food eaten the day…
- Renal System case #690 - A 62-year-old man with diabetic kidney failure on haemodialysis for two years wakes at night, gasping for breath. His last session was two…
- Renal System case #691 - A 19-year-old man has protein on a urine dipstick at a routine employment medical performed in the afternoon. He has no symptoms and no…
- Renal System case #692 - A 20-year-old woman is found to have glucose in her urine at a pre-employment examination. She has no thirst, polyuria or weight loss, and…
- Renal System case #693 - A 67-year-old man with chronic kidney disease has been increasingly tired and breathless on exertion over six months, with no bleeding or…
- Renal System case #694 - A 48-year-old man on continuous ambulatory peritoneal dialysis for diabetic kidney disease notices that the drained fluid is cloudy. He has…
- Renal System case #695 - A 72-year-old man on regular haemodialysis feels dizzy, sweaty and develops painful leg cramps during the third hour of his session.
- Renal System case #696 - A 26-year-old woman in her first pregnancy at 34 weeks has had two days of headache and swelling of her face, hands and ankles.
- Renal System case #697 - An 81-year-old woman in a care home has a urine dipstick positive for nitrite and leucocyte esterase on routine screening. She has no…
- Renal System case #698 - A 52-year-old woman who has had three vaginal deliveries leaks small amounts of urine when she coughs, sneezes or lifts shopping. She has…
- Renal System case #699 - A 6-year-old boy from a rural area has had several months of lower abdominal pain, frequent urination and blood at the end of voiding. He…
- Renal System case #700 - A 59-year-old man with alcohol-related cirrhosis is admitted with increasing abdominal swelling, leg oedema and drowsiness over two weeks.
- Renal System case #701 - A 44-year-old man with chronic alcohol dependence has abdominal pain and persistent vomiting for three days after stopping a drinking…
- Renal System case #702 - A 24-year-old woman presents six hours after taking an unknown number of tablets from a bottle of pain-killers during an argument. She has…
- Renal System case #703 - A 38-year-old man became unwell after drinking illicitly produced spirits at a party. He has headache, vomiting and, the next morning…
- Renal System case #704 - A 52-year-old man has had muscle weakness, cramps and headaches for two months. He was found to have high blood pressure at an occupational…
- Renal System case #705 - A 36-year-old woman with severe malnutrition after months of poor intake is admitted and started on full nutritional feeding. On the third…
- Renal System case #706 - A 9-year-old boy has poor growth, thirst, passing large volumes of urine and bone pain. He is the child of unrelated parents and has had…
- Renal System case #707 - A 24-year-old woman has had microscopic haematuria on every urine test since childhood. Her mother and her maternal aunt have also been…
- Renal System case #708 - A 31-year-old woman has had tiredness, ankle swelling and dark urine for two months. She has no recent sore throat or skin infection.
- Renal System case #709 - A 63-year-old man who injects drugs has had two weeks of fever and sweats. His urine has become dark and he feels short of breath.
- Renal System case #710 - A 68-year-old woman has had two months of weight loss, fatigue, joint pains and a purpuric rash on her legs. Her urine became dark four…
- Renal System case #711 - A 47-year-old woman with thickened skin of her hands and forearms for two years develops severe headaches and blurred vision. She started…
- Renal System case #712 - A 24-year-old woman has been found to have a blood pressure of 170/105 mmHg at a routine medical check. She takes no regular medicines and…
- Renal System case #713 - A 70-year-old man with diabetes and chronic kidney disease undergoes coronary angiography. His urine output falls and he feels nauseous…
- Renal System case #714 - A 77-year-old man has had months of poor stream and has recently begun to wet the bed at night. He feels tired and nauseous, and his…
- Renal System case #715 - A 39-year-old man received a deceased-donor kidney 5 months ago and has been adherent to tacrolimus and mycophenolate. Routine bloods show…
- Renal System case #716 - A 45-year-old woman, six weeks after a kidney transplant, develops a rising creatinine, tremor and a mild increase in blood pressure. She…
- Renal System case #717 - A 44-year-old woman with recurrent urinary infections since childhood has had dull right loin pain and malaise for three months. Her urine…
- Renal System case #718 - A 38-year-old man has had two days of fever, rigors, perineal pain, urinary frequency and pain on ejaculation. He is struggling to pass…
- Renal System case #719 - A 22-year-old man wakes with profound weakness of his legs and arms after a large meal of rice and sweets the night before. Similar…
- Renal System case #720 - A 3-month-old boy of Finnish descent has progressive swelling of his face and legs and a large belly. His parents are healthy; the…
- Renal System case #721 - A 14-year-old girl has had a week of dark urine and puffiness around the eyes after a mild upper respiratory illness. She has no rash or…
- Renal System case #722 - A 58-year-old woman has had slowly progressive tiredness for years and recently noticed visible blood in her urine. She lives in a rural…
- Renal System case #723 - A 43-year-old man is brought in by ambulance drowsy and vomiting, after drinking from a container in a garage. He staggers and speaks…
- Renal System case #724 - A 66-year-old woman with mild chronic kidney disease and hypertension has fatigue and nausea ten days after a bowel preparation before…
- Renal System case #725 - A 7-year-old girl has been constantly damp since toilet training despite voiding normally several times a day. She has had two febrile…
- Renal System case #726 - A 31-year-old man has persistent headaches, sweating and episodes of palpitation, and his father died young of a kidney tumour. He had…
- Renal System case #727 - A 45-year-old man who grew up in a village near an irrigation canal in the Nile delta has had painless blood at the end of urination since…
- Renal System case #728 - A 36-year-old man has had gouty attacks since the age of 20 and was told he has kidney impairment. His mother and a maternal uncle had gout…
- Renal System case #905 - A 34-year-old man with known nephrotic syndrome develops sudden left flank pain and visible blood in his urine over a day.
- Renal System case #906 - A 58-year-old man has had a progressively weak urinary stream and straining for a year. He had a catheter after surgery 10 years ago.
- Renal System case #907 - A 67-year-old man who smoked for 40 years and worked with aniline dyes has had painless visible haematuria for three weeks and a dull right…
- Renal System case #908 - A 66-year-old man with atrial fibrillation who stopped his anticoagulant has sudden severe left flank pain, nausea and one episode of blood…
- Renal System case #909 - A 74-year-old man with a urinary catheter placed in hospital two days ago has a painful swelling at the end of his penis after the nurse…
- Renal System case #910 - A 27-year-old man and his partner have been unable to conceive after 18 months of regular intercourse. He has a dull ache in the left…
- Renal System case #911 - A 38-year-old man has had perineal and suprapubic discomfort, painful ejaculation and frequency for eight months. He feels well otherwise.
- Renal System case #912 - A 19-year-old woman has had muscle cramps, tiredness, thirst and passing a lot of urine since childhood. She denies vomiting, laxatives or…
- Renal System case #913 - A 24-year-old man has had high blood pressure since his teens. His father and a brother had strokes in their forties and both took several…
- Renal System case #914 - A 31-year-old man of West African origin with sickle-cell anaemia notices that he passes a lot of dilute urine at night and has occasional…
- Renal System case #915 - A 6-year-old boy has had poor growth, bone pain and passing large volumes of urine. He drinks a lot of water.
- Renal System case #916 - A 66-year-old man with diabetes and long-standing mild kidney impairment is found to have a high potassium on routine bloods. He feels well.
- Renal System case #917 - A 21-year-old man has had hypertension since adolescence and is found to have persistently high potassium. He takes no medication.
- Renal System case #918 - A 33-year-old man of Black African origin with untreated HIV infection has noticed puffy eyes and ankle swelling for two months.
- Renal System case #919 - A 62-year-old woman who has taken combination painkillers daily for 20 years for chronic headaches presents with fatigue and passing urine…
- Renal System case #920 - A 45-year-old man has had three episodes of renal colic in two years. He had a large small-bowel resection for Crohn disease and has fatty…
- Renal System case #921 - A 35-year-old man has proteinuria found on a work medical. Since adolescence he has had burning pain in his hands and feet during fevers…
- Renal System case #922 - A 29-year-old woman with bulimia nervosa who uses laxatives and diuretics has had weakness, polyuria and thirst for months.
- Renal System case #923 - A 28-year-old man has had recurrent loin pain and two urinary tract infections in a year. He has no previous urinary problems.
- Renal System case #924 - A 57-year-old woman with long-standing hepatitis C infection has had purple leg rashes, joint pains and tiredness for four months.
- Renal System case #925 - An 18-month-old girl is brought with poor feeding, vomiting, constipation, polyuria and failure to thrive.
- Renal System case #926 - A 12-year-old boy has had thirst, nocturia and bed-wetting for two years, with tiredness and poor growth. His parents are cousins.
- Renal System case #927 - A 24-year-old man has noticed a painless lump in his left testis for two months, with a dull ache in the scrotum and cough.
- Renal System case #928 - A 38-year-old woman has been told she has chronic kidney disease found on a routine test. Her mother and maternal uncle started dialysis in…
- Renal System case #929 - A 44-year-old man with chronic kidney disease from a tubulo-interstitial disorder has recently had a diarrhoeal illness and feels dizzy on…