Suppurative Thyroiditis: Coinfection by Nocardia spp. and Mycobacterium tuberculosis in an Immunocompromised Patient.

Suppurative thyroiditis is a rare entity with a low incidence in thyroid diseases, manifesting with pain, fever, dysphagia, and dysphonia. Its infrequency is explained by the thyroid gland's resistance to infections due to its encapsulated position, high blood flow, bactericidal action of iodine, and extensive lymphatic network. We present the first report in the literature of a 72-year-old woman with a history of inflammatory myopathy and immunosuppression diagnosed with suppurative thyroiditis co-infected with Nocardia spp. and Mycobacterium tuberculosis. This entity requires a high clinical suspicion, and fine-needle aspiration biopsy (FNAB) is preferred as the diagnostic method for microbiological sampling. Although rare, it carries high morbidity and mortality if not suspected in time.

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