Initially Suspected Anaphylaxis Following Iodinated Contrast: Jod-Basedow Phenomenon in a 73-Year-Old Female Without a History of Thyroid Dysfunction.

The Jod-Basedow phenomenon (JB phenomenon), also referred to as "iodine-induced hyperthyroidism," rarely occurs. Radiological imaging using iodinated contrast contains a dose of 300 to 1221 mg of iodine per kilogram, which can transiently induce clinically significant hyperthyroidism (referred to as Jod-Basedow Syndrome) in euthyroid patients. Hence, the reporting of such events is important for clinicians to be aware of, to prevent unnecessary iodine-based imaging. Underlying thyroid abnormalities, including latent Graves' disease, autoimmune thyroiditis, use of iodine-containing foods or medications, such as amiodarone, and Lugol's iodine have been shown to increase the risk of JB phenomenon. In terms of the pathophysiology of the JB phenomenon, when iodine exposure is in excess, increased iodine leads to increased hormone synthesis, and with an absence of auto-regulation, this can lead to thyrotoxicosis. In this case report, we describe the iodine-induced JB phenomenon in a 73-year-old female with no prior thyroid dysfunction, who was initially admitted for pyelonephritis and was eventually transferred to the intensive care unit secondary to suspected anaphylaxis.

Rare Isolated Duodenal Hamartomatous Polyp in an Elderly Patient.

BACKGROUND Hamartomatous polyps represent rare sporadic lesions, characterized by fibrous stroma, vascular infiltration, and dilation of mucous glands. The lesions present in a bimodal fashion in adults as well as children from 1 to 7 years old, and are often diagnosed during endoscopic procedures. Specifically, solitary Peutz-Jeghers represents a type of hamartoma that has similar histologic features to typical Peutz-Jeghers syndrome. Hamartomatous polyps represent disorganized tissue growth and can bear relationships with genetic syndromes classified as hamartomatous polyposis syndromes. A number of these syndromes, such as Peutz-Jeghers and Cowden syndrome, can demonstrate an increased risk of malignancy. A variety of symptoms, or no symptoms at all, can accompany these polyps, such as abdominal discomfort, bowel obstruction, gastrointestinal bleeding, or intussusception in severe cases. Histologically, these polyps appear similar to Peutz-Jeghers syndrome growths; however, they lack extraintestinal manifestations. Given fairly low risk of development into malignancy, patients have a good prognosis if presenting with a solitary hamartomatous polyp. There is limited data regarding screening guidelines for this patient population. CASE REPORT Here, we present a rare case of a 73-year-old woman who had a history of anemia and status post endoscopic evaluation and was diagnosed with a benign hamartomatous polyp (juvenile-like), histologically consistent with tubulovillous adenoma. CONCLUSIONS Differentiating sporadic polyps from syndromic polyps is important, as sporadic polyps have a benign course, while those associated with a syndrome have an increased lifetime malignancy risk.