Syndrome with hypoparathyroidism

Syndrome with hypoparathyroidism (Orphanet code 181402) is not a single disease entity but rather a broad grouping category used by Orphanet to classify a collection of rare genetic syndromes in which hypoparathyroidism — insufficient production of parathyroid hormone (PTH) — occurs as one component of a more complex clinical picture. Hypoparathyroidism leads to low blood calcium (hypocalcemia) and elevated phosphate levels, which can cause symptoms such as muscle cramps, tingling or numbness in the extremities and around the mouth, seizures, and cardiac rhythm abnormalities. In syndromic forms, hypoparathyroidism is accompanied by additional features affecting multiple organ systems depending on the specific underlying condition. Examples of syndromes grouped under this category include DiGeorge syndrome (22q11.2 deletion syndrome), HDR syndrome (hypoparathyroidism, sensorineural deafness, and renal anomalies), Kenny-Caffey syndrome, Sanjad-Sakati syndrome, and autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED/APS type 1), among others. These conditions may affect the immune system, kidneys, skeleton, hearing, heart, and endocrine glands in various combinations. The inheritance patterns, ages of onset, and severity vary widely depending on the specific syndrome involved. Treatment of the hypoparathyroidism component typically involves calcium and active vitamin D (calcitriol) supplementation to maintain normal blood calcium levels and prevent complications. In some cases, recombinant parathyroid hormone therapy may be considered. Management of the broader syndrome requires a multidisciplinary approach addressing each affected organ system. Genetic counseling is recommended for affected families, and early diagnosis through genetic testing can help guide surveillance and treatment strategies.

Common questions about Syndrome with hypoparathyroidism