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Correction to Beigel et al., N Engl J Med 339(12):827-830 September 17, 1998.

Correspondence
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Volume 340:568-569 February 18, 1999 Number 7
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Diagnosing Lead Poisoning

 

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To the Editor: In their Clinical Problem-Solving article, Beigel et al. (Sept. 17 issue)1 describe a patient with abdominal pain of unclear cause whose symptoms responded well to the administration of a placebo. The discussant mentions that "the patient's response to a placebo injec-tion . . . raises the possibility of a psychological cause." A change in the patient's condition due to the injection of a placebo should not necessarily be interpreted as evidence of a psychogenic cause. Placebo medications and procedures have been shown to be efficacious in treating angina2 (one of the diagnoses considered by the discussant) as well as other disorders.

Perhaps of more concern are the ethical implications involved in the use of placebos to treat pain syndromes. Several review articles describe the deception involved in most instances in which physicians have used placebos,3,4 as well as the ethical implications for the nursing staff involved in dispensing the medication.5 By giving the patient under discussion a dose of placebo under the guise of giving a medication with known pharmaceutical effect, the physicians violated his right to informed consent regarding medical therapy. In addition, they abused their patient's trust and, by publicizing their deception, they seemingly legitimize this questionable practice.


Laurent Adler, M.D.
David Muller, M.D.
Mount Sinai Medical Center
New York, NY 10029-6574

References

  1. Beigel Y, Ostfeld I, Schoenfeld N. A leading question. N Engl J Med 1998;339:827-830. [Free Full Text]
  2. Benson H, McCallie DP Jr. Angina pectoris and the placebo effect.N Engl J Med 1979;300:1424-9.
  3. Brody H. The lie that heals: the ethics of giving placebo. Ann Intern Med 1982;97:112-118.
  4. Bok S. The ethics of giving placebos. Sci Am 1974;231:17-23. [Medline]
  5. McCaffery M, Ferrell BR, Pasero CL. When the physician prescribes a placebo. Am J Nurs 1998;98:52-53. 

 
To the Editor: The description of a 43-year-old man with new-onset acute abdominal pain by Beigel and colleagues offers a compelling argument for the use of peripheral-blood smears sooner rather than later in patients with anemia. Although this previously essentially well patient with type 2 diabetes mellitus underwent many sophisticated biochemical studies, the diagnosis of lead intoxication was made in a needlessly tortuous fashion by the finding of increased urinary concentrations of porphyrins and their precursors. However, he also had some degree of hypertension and a hemoglobin concentration of 8.9 g per deciliter.

Before lead intoxication was suspected because of the abnormal urinary porphyrin findings and confirmed by the finding of a high urinary lead excretion, the patient underwent an extensive workup, including an array of biochemical blood tests, abdominal ultrasonography, upper gastrointestinal series, abdominal computed tomography, gastroscopy, and colonoscopy. After the diagnosis of lead intoxication was made biochemically, the blood smear was examined and found to show the hypochromia and basophilic stippling typical of this disorder.

Modern technology has revolutionized medical diagnosis, but 30 years ago a patient with anemia, acute abdominal pain of recent onset, hypertension, and a remarkable degree of reticulocytosis would have had a blood smear examined earlier — and this should still be the case.


Christine Lawrence, M.D.
Albert Einstein College of Medicine
Bronx, NY 10461


 
To the Editor: The Clinical Problem-Solving article entitled "A Leading Question" concerned a man with lead poisoning. In order to diagnose the condition, at least 50 laboratory tests were performed, 2 radiographs and a computed tomographic scan were obtained, and abdominal and Doppler ultrasonography, gastroscopy, and colonoscopy were performed. Only after all these investigations was a blood smear examined. This showed hypochromia, slight microcytosis and anisocytosis, a few target cells, and basophilic stippling. Lead poisoning should have been suspected from the beginning, since constipation and intermittent abdominal pain (lead colic) that are not associated with nausea, vomiting, fever, or eating are cardinal symptoms. The finding of anemia should have heightened the suspicion of this diagnosis, and analysis of a blood smear should have been done immediately.

The discussant did not seem to notice the overkill associated with weak diagnostic skill. The excesses of contemporary medicine, the emotional burden, the pain, the discomfort, the anxiety, the time spent, and the cost are among the forces that drive people into the arms of alternative medicine.


Imre J.P. Loefler, F.R.C.S.
Nairobi Hospital
Nairobi, Kenya


 
To the Editor: In the otherwise intelligently entertaining Clinical Problem-Solving article "A Leading Question," the serum iron concentration and reticulocyte count should have been expressed in micrograms per deciliter and units per thousand, respectively, instead of milligrams per deciliter and percents, as was printed, I believe incorrectly. If this is not the case, can the authors explain the extremely high iron and reticulocyte values?


Michel Abramowicz, M.D.
Institut Médical Edith Cavell
1180 Brussels, Belgium


 
Dr. Beigel replies:

To the Editor: The initial evaluation of our patient focused on the possibility of an event that required surgical treatment, and only after such a possibility was excluded was an investigation of other possible causes of the abdominal pain and the anemia started. As Dr. Lawrence and Dr. Loefler point out, earlier examination of a blood smear in our patient could have led to an earlier diagnosis, thereby averting part of the intensive workup.

The placebo effect is a poorly understood psychophysiologic response. In appropriate circumstances, doctors may consider giving a placebo for the benefit of their patient.1 In our patient, narcotics were used several times to relieve pain, and we believe that the use of a single saline injection was justified in our search for a less harmful therapy.

Our patient turned to alternative medicine, not for any of the reasons suggested by Dr. Loefler, but because of his misguided belief that it could provide a safe and harmless cure for his mild, well-controlled diabetes mellitus. Indeed, this case report is a good example of how dangerous, even life threatening, alternative medicine can be.

We regret the errors in the serum iron concentration, which was 150 µg per deciliter, and the reticulocyte count, which was 4.5 percent.


Yitzhak Beigel, M.D.
Rabin Medical Center
49100 Petah-Tikva, Israel

References

  1. Oh VM. The placebo effect: can we use it better? BMJ 1994;309:69-70. [Free Full Text]

 


 

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