Familial hypocalciuric hypercalcemia (FHH) type 1, caused by a heterozygous inactivating mutation of the gene encoding the calcium-sensing receptor (CaSR), is characterized by mild to moderate hypercalcemia, hypocalciuria and inappropriately normal or elevated parathyroid hormone (PTH). FHH must be differentiated from primary hyperparathyroidism (PHPT) because parathyroidectomy is ineffective in the former. Herein, we report a 39-year-old male patient with a 13-year history of asymptomatic PTH-dependent hypercalcemia (mean calcium of 2.88 mmol/l; reference range 2.15-2.55 mmol/l) and calcium-tocreatinine clearance ratio (Ca/Cr) ranging from 0.007 to 0.0198, which is consistent with either FHH or PHPT. Although a family history of hypercalcemia was negative, and PET-CT with fluorocholine was suggestive of a parathyroid adenoma, genetic analysis of the CaSR gene identified a heterozygous inactivating mutation NM_000388.4:c.1670G>A p. (Gly557Glu) in exon 6 and a polymorphism NM_000388.4:c.1192G>A p. (Asp398Asn) in exon 4. The G557E mutation has been previously reported in a Japanese family in which all family members with the mutation had Ca/Cr below 0.01 consistent with FHH. The biochemical profile of FHH and PHPT may overlap. Our FHH patient with a G557E CaSR mutation illustrates that the differential diagnosis can be difficult in an index case with no family history, (false) positive parathyroid imaging and higher calciuria than expected for FHH. Calcium intake, vitamin D status and bone resorption might have contributed to the Ca/Cr variations over a 13-year clinical follow up. This case thus emphasizes the irreplaceable role of genetic testing of the CaSR gene when clinical evaluation is inconclusive., Kateřina Zajíčková, Marcela Dvořáková, Jitka Moravcová, Josef Včelák, David Goltzman., and Obsahuje bibliografii
Iodine is essential in the biosynthesis of thyroid hormones that affect metabolic processes in the organism from the prenatal state to the elderly. The immediate indicator of iodine intake is the concentration of iodine in urine, but the indicator of iodine intake in the longer term of several months is thyroglobulin (Tg). Tg negatively correlated with increasing intake of iodine in population that do not suffer from thyroid disease, while a more than adequate to excessive iodine intake leads to an increase in Tg. The dependence of Tg on iodine can be described by a U-shaped curve. Thyroglobulin in serum is elevated in thyroid disease mainly in hyperthyroidism (diagnosis E05 of WHO ICD-10 codes) and in goiter (diagnosis E04 of WHO ICD-10 codes). Tg values decrease below 20 µg/l after effective treatment of patients with thyroid disease. Thyroglobulin may thus be an indicator of thyroid stabilization and the success of the thyroid gland treatment., Radovan Bílek, Marcela Dvořáková, Tereza Grimmichová, Jan Jiskra., and Obsahuje bibliografii
Předkládáme kazuistiku třináctileté pacientky somálského původu, která byla přijatá na naše pracoviště pro měsíc trvající B symptomy a prokázanou břišní lymfadenopatii jako suspektní lymfom. Vstupní vyšetření prokázalo pozitivitu Mantoux testu, přestože pacientka nepodstoupila BCG vakcinaci. Histopatologické vyšetření bioptované ileocékální uzliny potvrdilo zánětlivý granulomatózní proces s kaseózní nekrózou, mikrobiologické vyšetření včetně klasické kultivace prokázalo mycobacterium tuberculosis. Diagnóza byla uzavřena jako střevní forma TBC a pacientku jsme přeložili na pracoviště specializované pro léčbu dětské formy TBC., We report a case of a 13-year-old girl of Somali origin who was admitted for suspected lymphoma. She had developed typical B symptoms and abdominal lymphadenopathy within the passed month. Though the patient has never undergone BCG vaccination, the Mantoux skin test was positive. The girl underwent an ileocaecal lymph node biopsy – histopathological findings showed granulomatous inflammation with caseation necrosis and mycobacterium tuberculosis was culture-confirmed from the examined tissue. Diagnosis of abdominal TB was assessed and the girl was sent to a pediatric department specialized in the treatment of childhood TB., Lucie Cingrošová, Lenka Mrázková, Marcela Dvořáková, Luboš Zeman, Josef Mališ, Jiřina Hobstová, Pavel Dryák, Vít Campr, Jan Starý, and Lit.: 7