However, thyroid function tests can be mildly increases (in about 25% of patients) because of the release of the hormone from the inflamed gland [4]. About half of the patients manifest clinical hypothyroidism during the course of the thyroiditis, while the rest are euthyroid. Hypothyroidism is commonly seen in patients with P. carinni infection [17,18]. Hypothyroidism can, however, be a presentation of an extrapulmonary P. carinni infection in patients with HIV infection [19].