A 71-year-old woman came into our story already being prepared for the end of her independent life. Over about eighteen months her mind had been slipping, her memory and thinking growing less reliable. She had also become unsteady on her feet, and she had begun to lose control of her bladder. The conclusion drawn from this was the one that families dread most: Alzheimer's dementia. Plans were already in motion around that diagnosis, with a move into a care home being arranged and an advance directive being discussed. Her future was being quietly closed down.
But look closely at what she actually had, because the details matter enormously here. Hers was not a picture of memory loss alone. It was three things arriving together: a decline in thinking, a disturbance of walking, and a loss of bladder control. That particular combination is not the typical signature of Alzheimer's, where memory tends to fail first and walking and continence are usually spared until very late. It is, however, the classic and well-known pattern of a completely different and treatable condition.
If an older person is being diagnosed with dementia but also has trouble walking and bladder control early on, that combination is worth a second look, because it points toward a cause that can sometimes be reversed.
The three features together, the triad, are what doctors are taught to recognise, and the differences from ordinary dementia are telling:
- A change in walking, often the first sign, with a slow, broad, shuffling gait and a feeling that the feet are stuck to the floor
- Cognitive slowing, more a sluggishness of thinking and attention than the dense short-term memory loss typical of Alzheimer's
- Urinary urgency progressing to incontinence, appearing alongside the other two rather than only at the very end
- A relatively gradual onset over months, with all three problems advancing together
- Frequent stumbles or falls, driven by the gait problem rather than by confusion alone
When walking and continence fail early, in step with the thinking, the pattern is shouting that this may not be a standard, irreversible dementia at all.
What the first opinion concluded
Her first assessment came from neurology, which diagnosed Alzheimer's dementia and moved toward medication and residential care.
Alzheimer's is by far the most common cause of dementia, and reaching for it in an older patient with cognitive decline is statistically reasonable. Most of the time, sadly, it is the right answer.
The difficulty is the weight of what was being decided on the back of it. An Alzheimer's diagnosis is, in effect, a one-way door. It triggers care-home planning and end-of-life conversations precisely because it is understood to be irreversible. A diagnosis that closes the future like that carries a special obligation to be certain, and to have actively excluded the treatable conditions that can imitate it. Her early gait and bladder symptoms were exactly the flag that should have prompted that exclusion before the door was allowed to close.
The second opinion
She was referred for a medical second opinion that combined neuropsychological assessment with a fresh, up-to-date cranial MRI, rather than accepting the existing diagnosis as final.
The scan reframed everything. It showed a markedly enlarged ventricular system, the fluid-filled spaces deep in the brain, without the widened surface grooves that would indicate the brain had shrunk away. In other words, the ventricles were large because fluid was accumulating and pushing outward, not because the brain tissue had wasted as it does in Alzheimer's. This pointed to normal pressure hydrocephalus, or NPH, a condition in which cerebrospinal fluid builds up in the brain and produces exactly her triad of symptoms. To confirm it, they performed a tap test, draining a small volume of that fluid and watching for improvement. It came back positive, her function visibly improving, which strongly predicts that the right operation will help.
That operation was a ventriculoperitoneal shunt, a thin tube placed to drain the excess fluid away from the brain. The result was the kind that this whole series exists to highlight. Her cognition recovered significantly, her walking returned to normal, and her continence was restored. She is living independently again, in the life that had been packed away on her behalf.
Why this case matters
The lesson is one of the most important in all of medicine, and one of the easiest to forget.
Dementia is not a single disease, and it is not always irreversible. A meaningful minority of cases hide a treatable syndrome, and the only way to find it is to actually go looking before the label is accepted as final.
The word dementia carries such finality that it can stop the search at the moment it most needs to continue. Honest communication in healthcare means treating it as a description of symptoms that still requires a cause, especially when life-altering decisions like residential care follow from it. Her gait and her bladder were not background details. They were the clue, sitting in plain view, that the most common diagnosis might be the wrong one.
A word of balance
This deserves to be said clearly, because the topic is painful. Most dementia is not reversible. Alzheimer's and the other common dementias are real and devastating, and this case is not a promise that such diagnoses can usually be undone, because they cannot. Reversible causes like NPH are the minority. But they are precisely the minority worth excluding with care, because when one is found, the payoff is a life given back. The point is not false hope. It is the discipline of ruling out the treatable before accepting the untreatable.
A medical second opinion is especially worth seeking when:
- A dementia diagnosis comes with early walking difficulty and bladder problems, not memory loss alone
- Major, life-changing steps such as care-home placement are being planned on the diagnosis
- A current brain scan and a proper cognitive assessment have not recently been done
- The treatable causes of cognitive decline have not been clearly ruled out
Which leaves the question this case asks of every dementia diagnosis: when did we last stop to look for the treatable syndrome that might be hiding behind it?
This is exactly the kind of moment CW1 exists for, helping families obtain a medical second opinion before an irreversible label closes a future, and strengthening the communication in healthcare that keeps the search going until a cause is truly found.
Note: this is one case rather than medical advice, and reversible dementias are uncommon. If this resonates with a loved one's situation, the right next step is a careful conversation with a neurologist, ideally at a specialised centre.