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Previous Volume 351:835-836 August 19, 2004 Number 8 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: The medical mystery in the July 1 issue¹ involved 50-year-old identical twins (Figure 1A). The patient is the twin on the left side of the photograph. He has acromegaly caused by a growth hormone–hypersecreting pituitary macroadenoma. He presented with visual-field impairment, and magnetic resonance imaging showed a pituitary macroadenoma with extrasellar extension (Figure 1B shows a coronal section, and Figure 1C a sagittal section). A few months earlier, obstructive sleep apnea had been diagnosed. The history also included headache, enlargement of the feet, increased sweating, and joint stiffness. The patient's serum insulin-like growth factor . . . [Full Text of this Article]

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