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from https://www.123rf.com/photo_39828288_doctor-showing-xray-to-his-patient-in-medical-office.html |
"So what might it be?" asks the older man in my Kirksville academic practice when I show him the shoulder x-ray taken after his Friday afternoon treatment.
"Why don't we wait for the radiologist's reading on Monday" I assert, having never seen such a circular calcification in a glenohumeral joint.
"Come on Doc" he pleads, "I'll worry all weekend if you leave me hanging."
"That marble in your joint is probably related to osteoarthritis."
"What else could it be?"
"It's better not to speculate when I don't really know" I persist.
"I've worked in health services administration my whole life" he continues, shifting to a more formal tone. "I can handle anything you can throw at me."
"Dealing with medical billing and collections is a lot different from misuse of differential diagnosis" I counter, resorting to my own jargon to stave him off.
"My wife's a nurse" he reasons. "She can help me process anything that could be wrong."
"I still don't think it's a good idea" I concede, "but, since you insist on knowing now, that nodule could also be a bone spur from an old injury, a granuloma from a previous infection, or a calcification from a systemic problem like gout, amyloidosis, or Paget's disease."
"Couldn't it also be a tumor?"
"That would be lower down on the list, but, yes, primary or metatastatic cancer is a less likely cause of a joint calcification."
"Thanks for letting me know" he breathes, sounding relieved. "You'll call with the radiology report?"
"Yes if they think it's anything other than arthritis."
__________
The system used by medical practitioners to determine if any tests are needed and to arrive at a presumptive diagnosis is called differential diagnosis. The possible causes are ranked from most to least likely, and any serious causes higher up on the list are considered for lab or x-ray testing. This thought process allows a doctor, nurse practitioner, or physician's assistant to arrive at the most likely and rule out the more life threatening causes for a set of symptoms. While infinitely useful for the diagnostic process, the details of differential diagnosis are potentially harmful for the person with the problem to know about (and obsess over).
For my part, I probably should have known that it's not unusual to see calcified nodules in x-rays of aging joints. Failing to have seen one in radiology rotations as a student and intern or in patients as a resident, I was overly reliant on the radiology interpretation at this early stage of my career. And recognizing this man's anxiety about mortality might have provided a better pathway to helping him through touch and treatment. Experiencing and processing each interaction makes one a more proficient practitioner.
__________
"Can I have a word with you Dr. Beatty?" calls the school president poking his head into my office.
"Sure, I just finished up with patients" I answer, sliding my chair out and waving him in. "What's up?"
"Do you remember a nursing home administrator you saw a couple weeks ago?" he starts, plopping a patient chart onto the desk beside me.
"Oh yeah, that's the guy I let talk me into divulging too much about his shoulder x-ray before the radiology reading."
"Well, we got this angry letter" he continues, reaching it across to me. "You apparently ruined his vacation and caused him to have high blood pressure, insomnia, headaches, and a few other more litigious problems."
"Ha, I knew I shouldn't have caved" I exclaim. "I'll apologize in a letter a for sharing too much and not calling him. I'll also remind him that he repeatedly asked for more possible causes despite my objections."
"That should be fine" he sighs, standing up to leave before calling back "as long as I don't hear another word about it."