18F-FDG PET/CT imaging of atypical subacute thyroiditis in thyrotoxicosis: A case report

A Retrospective Study of Various Iron Preparations Oral Administration in Pregnant Women with Iron Deficiency Anemia

During pregnancy anemia is a common medical condition, with iron deficiency and megaloblastic anemia being the most common. The symptoms range from very mild to severe and if left without proper medical treatment, there can be serious consequences for both mother and fetus. The most frequent pregnancy problem is anemia. The term "Iron Deficiency Anemia" refers to erythropoiesis under conditions of absolute iron deficiency. This presupposes the depletion of iron stores in the body. Iron deficiency anemia or Sideropenic anemia is the most common form of anemia worldwide. Special attention must be given to nutrition during pregnancy. In the current retrospective study, it was evaluated the contribution of various iron preparations substitution during the pregnancy and puerperium.

Craniopharyngioma as a Cause of Fever of Unknown Origin

BACKGROUND

Fever of unknown origin is quite common in everyday clinical practice, and the approach is challenging. Prolonged fever as the sole manifestation of craniopharyngioma has been rarely reported in literature.

OBJECTIVE

Herein, we report a case of adamantinomatous craniopharyngioma presented as fever of unknown origin in a 51-year-old woman, initially misdiagnosed as atypical subacute thyroiditis.

CASE PRESENTATION

During the work up, the patient complained about bitemporal hemianopsia. Thus, she underwent a pituitary Magnetic Resonance Imaging, which revealed a mixed mass originating from the pituitary stalk and compressing the optic chiasm. The mass was surgically excised, and the histology confirmed the diagnosis of adamantinomatous craniopharyngioma. The patient remained afebrile post-surgery. We hypothesize that the craniopharyngioma caused an abnormality of thermoregulatory mechanisms due to infiltration of the hypothalamus.

Diagnostic Value of 2-[18F]FDG PET/CT in a Patient with Atypical Subacute Thyroiditis: A Case Report

Simple Summary

Positron emission tomography/computed tomography (PET/CT) imaging with 2-deoxy-2-[¹⁸F]fluoro-d-glucose (2-[¹⁸F]FDG) could be a useful diagnostic tool to detect foci of infection or inflammation in patients with fever of unknown origin (FUO) or with inflammation of unknown origin (IUO). We report a case of a patient originally presenting with a clinical history of FUO and later with persistent high-sensitivity C-reactive protein (hsCRP) levels, even after antibiotic therapy. The patient underwent 2-[¹⁸F]FDG PET/CT to investigate and to localize a possible focus of infection or inflammation. Since only 2-[¹⁸F]FDG hotspots were detected in both thyroid lobes, specific thyroid diagnostic examinations were performed. Subacute thyroiditis (SAT) was then diagnosed, and other possible causes of FUO or IUO were excluded. We found it interesting to present this case to illustrate the potential diagnostic value of 2-[¹⁸F]FDG PET/CT imaging in patients with atypical SAT presenting only with FUO.

Abstract

Background: Positron emission tomography/computed tomography (PET/CT) imaging with 2-deoxy-2-[¹⁸F]fluoro-d-glucose (2-[¹⁸F]FDG) is a sensitive diagnostic imaging modality in oncology and could be a useful diagnostic tool in patients with fever of unknown origin (FUO) or with inflammation of unknown origin (IUO). Case presentation: We report a case of a patient originally presenting with a clinical history of FUO and later with persistent high-sensitivity C-reactive protein (hsCRP) levels, even after antibiotic therapy. The patient underwent 2-[¹⁸F]FDG PET/CT to investigate and to localize a possible focus of infection or inflammation. 2-[¹⁸F]FDG hotspots were detected in both thyroid lobes. Thyroid diagnostic examinations and follow up were performed. Subacute thyroiditis (SAT) was then diagnosed by thyroid examinations, and other possible causes of FUO or IUO were not found. Conclusion: This case illustrates the potential diagnostic value of 2-[¹⁸F]FDG PET/CT in patients with atypical SAT, who originally present with only a clinical history of FUO.

Painful Subacute Thyroiditis is Commonly Misdiagnosed as Suspicious Thyroid Nodular Disease

Objective

To investigate and characterize the clinical and radiologic features of 10 patients with painful subacute thyroiditis with ultrasound findings considered suspicious for malignancy or for whom biopsy of a suspicious area was recommended by an attending radiologist.

Patients and Methods

Ten patients with painful subacute thyroiditis were seen from June 1, 2016, through January 1, 2019. All 10 patients presented to an endocrine or thyroid clinic with a neck ultrasound report stating findings suspicious for malignancy or nodular disease. Clinical, laboratory, radiographic, and pathologic data were (retrospectively collected and) reviewed.

Results

The mean ± SD patient age was 49.0±15.0 years at diagnosis; 8 patients were female. All the patients presented with a low or undetectable serum thyrotropin level. Six of 7 patients with available inflammatory markers had elevated levels. Thyrotropin receptor antibodies were absent in all 6 patients tested. On follow-up imaging, 8 patients had complete resolution or improvement of described findings, 1 was lost to follow-up, and 1 had an incidental nodule that was biopsied after the episode of thyroiditis and found to be papillary thyroid carcinoma.

Conclusion

Painful subacute thyroiditis demonstrates specific sonographic patterns that may be misdiagnosed as suspicious thyroid nodular disease. Recognition of the innocent and transient nature of these findings is important for the proper management and monitoring of these patients.