Acute acquired toxoplasmosis presenting as polymyositis and chorioretinitis in immunocompetent patient.

The parasite Toxoplasma gondii mainly encysts in brain, retina, myocardium, and skeletal muscle. It has been implicated in the genesis of inflammatory myopathies for years, but the parasite usually cannot be detected in the muscle. It is established, however, that toxoplasmosis can cause myositis either by recent infection or by reactivation.

Hypoparathyroidism in systemic lupus erythematosus.

Hypoparathyroidism is a rare disease. The main cause of hypoparathyroidism is postsurgical hypoparathyroidism. However, cases of hypoparathyroidism in patients suffering from SLE exist although it is uncommon.