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Query: UMLS:C0221002 (primary hyperparathyroidism)
 4,921 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Clinical or subclinical hyperparathyroidism is one of the most common endocrine disorders. Excessive secretion of parathyroid hormone is most frequently caused by an adenoma of >or=1 parathyroid gland. Unsuccessful surgery with persistent hyperparathyroidism, due to inadequate preoperative or intraoperative localization, may be observed in about 10% of patients. The conventional surgical approach is bilateral neck exploration, whereas minimally invasive parathyroidectomy (MIP) has been made possible by the introduction of (99m)Tc-sestamibi scintigraphy for preoperative localization of parathyroid adenomas. In MIP, the incision is small, dissection is minimal, postoperative pain is less, and hospital stay is shorter. Localization imaging techniques include ultrasonography, CT, MRI, and scintigraphy. Parathyroid scintigraphy with (99m)Tc-sestamibi is based on longer retention of the tracer in parathyroid than in thyroid tissue. Because of the frequent association of parathyroid adenomas with nodular goiter, the optimal imaging combination is (99m)Tc-sestamibi scintigraphy and ultrasonography. Different protocols are used for (99m)Tc-sestamibi parathyroid scintigraphy, depending on the institutional logistics and experience (classical dual-phase scintigraphy, various subtraction techniques in combination with radioiodine or (99m)Tc-pertechnetate). MIP is greatly aided by intraoperative guidance with a gamma-probe, based on in vivo radioactivity counting after injection of (99m)Tc-sestamibi. Different protocols used for gamma-probe-guided MIP are based on different timing and doses of tracer injected. Gamma-probe-guided MIP is a very attractive surgical approach to treat patients with primary hyperparathyroidism due to a solitary parathyroid adenoma. The procedure is technically easy, safe, with a low morbidity rate, and has better cosmetic results and lower overall cost than conventional bilateral neck exploration. Specific guidelines should be followed when selecting patients for gamma-probe-guided MIP.
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PMID:Preoperative localization and radioguided parathyroid surgery. 1296 Jan 91

We report a clinical case of a 26 years old female who had a 2 years evolution chin tumour with hypercalcemia (11.8 mg/dl) and PTH (paratohormone) of 761 pg/ml. She underwent a CT scan and MRI of the mandible, as well as a biopsy followed by excision of the tumour by the maxilofacial surgeons. Our ENT Department asked for a Scintigraphy (Tc99s-mibi) and thoracic-cervical CT, which showed a lesion that turned out to be an adenoma of the lower right parathyroid gland after surgery and pathological examination. The patient suffered a Primary hyperparathyroidism that was the main stimulus for the Brown Tumour made up by macrophagos and multinuclear giant cells, being this the first manifestation of the metabolic disorder. This form of hyperparathyroidism is very rare in the clinic. We do a literature review to establish the differential diagnosis for such pathology.
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PMID:[Brown bone tumor as the first manifestation of primary hyperparathyroidism]. 1456 82

Primary hyperparathyroidism is due to an adenoma in 85% of cases. In 10% of cases, the parathyroid adenoma may be in an ectopic location. Ten per cent of these ectopic adenomas are located in the mediastinum. Imaging modalities performed in persistent or recurrent hyperparathyroidism include ultrasound, MIBI scintigraphy, venous blood sampling, helical CT and MRI. The authors report 3 cases of ectopic adenoma located in the mediastinum, where pre-operative diagnosis was confirmed using cardiac MRI sequences.
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PMID:[Diagnosis of ectopic mediastinal parathyroid adenomas: value of cardiac MRI]. 1471 47

More than 95% of patients with Primary Hyperparathyroidism (PHPT) are treated successfully at the initial operation when the operation is done by an experienced surgeon, but the success rate is considerably lower when done by an unexperienced surgeon. The approach to patients with persistent and recurrent PHPT is to confirm the diagnosis and to use precise localization procedures done by expert radiologists. Reexploration after one or more previously failed parathyroid operations is unfortunately associated with a higher morbidity and a lower success rate. Improved pre- and intraoperative testing during the last decade has improved the results of reoperation and allowed more focused approaches. Preoperatively, we recommend a combination of sestamibi scanning, ultrasound, and MRI scanning. Highly selective venous sampling for iPTH is recommended for patients with recurrent or persistent PHPT when the non-invasive studies are negative, equivocal, or discordant. Several factors such as age of the patient, severity of symptoms, comorbidity, and the results of localization studies, should all be considered in the management of these patients although we believe that reoperation is indicated for most of these patients. Today successful reoperations can be done in more than 90% of patients with a relatively low morbidity rate.
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PMID:Persistent or recurrent primary hyperparathyroidism. 1497 Dec 86

A 50-year-old woman presented with pain and tenderness in the right flank. Urogram and ultrasound demonstrated the presence of an 8-mm calculus in the right kidney. There were persistently elevated serum calcium levels ranging from 10.7-11.4 mg/dL (normal range: 8.5-10.5) and borderline low serum phosphate levels of 2.4-2.9 mg/dL (normal range 2.5-4.5). Serum albumin levels were normal. The patient's parathormone levels were elevated and a diagnosis of primary hyperparathyroidism was made. An MRI of the neck failed to reveal evidence of parathyroid pathology. Tc-99m sestamibi imaging demonstrated no abnormal parathyroid tissue in the neck, but clearly showed an abnormal focus in the anterior mediastinum.
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PMID:Tc-99m sestamibi localization of an ectopic mediastinal parathyroid tumor in a patient with primary hyperparathyroidism. 1516 92

Primary hyperparathyroidism (PHPT) is not a rare disease. Renal stones are the most frequent complication of PHPT The authors report the case of a patient with giant parathyroid adenoma responsible for early recurrence of renal stones. Ultrasound examination of the neck, parathyroid MRI and Technetium99m-Sestamibi scintigraphy confirmed the parathyroid adenoma. Surgical exploration allowed resection of a giant adenoma (6.5 x 2.5 x 1.5 cm weighing 17 g). In the light of this case, the authors describe the characteristics of HPT define the place of preoperative imaging and emphasize the need for systematic aetiological work-up looking for HPT in all patients with a first episode of renal stones.
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PMID:[Giant parathyroid adenoma causing early recurrence of renal stones]. 1537 85

453 patients underwent surgery for primary hyperparathyreoidism between 1994 and 2003. In all patients, biochemical parameters were monitored and X-ray with USG of the neck was done. Struma nodosa was concommitantly present in 48 % of treated patients with primary hyperparathyroidism. In such cases, MRI offers better resolution of soft tissues. 98.6 % of treated patients had postoperative decrease of blood calcium to normal level. 5.4 % of cases were reoperations for primary hyperparathyroidism. In 12 % of cases, pathologically changed parathyroid glands in dystopic localization were found. In these dystopic localizations, pathologic parathyroid glands were found: in 3 % intrathyroid, in 7 % mediastinal and in 2 % of all 453 cases in other localization. In 4 % of patients, sternotomy was necessary. Persistent hypocalcemia was not registered in any patient. Transient hypocalcemia with necessity of infusion therapy was observed in 3.5 % of patients. Postoperative hypercalcemia persisted in 1.2 % of patients. Recurrent hypercalcemia was present in 0.2 % of cases. In three cases (0.7 %), unilateral injury of recurrent laryngeal nerve was observed.
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PMID:[Surgical therapy of primary hyperparathyroidism and it's complications. Experience with 453 patients]. 1584 52

We report the case of an 11-year-old child with delayed development who developed signs of exercise-induced pain in the lower limb muscles after an acute attack of appendicitis. He had difficulty standing up from the sitting position and ascending and descending stairs. The physical examination revealed increased reflex activity in the lower limbs. Initially, blood tests, MRI and EMG were normal. Serum phosphorus and calcium were not assayed. Eight months later, the boy's condition worsened (myopathy gait, hyperlordosis) leading to the possible diagnosis of muscle disease. After muscle biopsy, blood tests revealed hypercalcemia at 3.5 mmol/l (normal 2.2-2.6), hypercalciuria, and hypophosporemia. The diagnosis of primary hyperparathyroidism was confirmed by the abnormal level of parathormone initially (19 ng/ml) and later (156 ng/ml) with hypercalcemia. Medical treatment failed and surgery was performed to remove three and a half parathyroid glands. After removal, blood tests returned to normal in six days and the physical examination in three years. The diagnosis of principal cell hyperplasia was retained at the pathology examination. We found no evidence of hypercalcemia or other endocrinopathy such as multiple endocrine neoplasia (MEN 1 or 2a). Study of the menine gene did not reveal any mutation. Muscle dysfunction suggest possible abnormal phosphocalcium regulation. A normal parathormone level with hypercalcemia reveals inappropriate synthesis and secretion.
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PMID:[Primary hyperparathyroidism revealed by pseudomyopathia]. 1595 13

We report the imaging features of an occult parathyroid adenoma with unusual location in the carotid sheath. Our patient presented with primary hyperparathyroidism. Following negative neck ultrasound and scintigraphy, exploratory neck dissection with partial thyroidectomy was performed twice over a 2 day period without biological response. Cervical and mediastinal CT and MRI were performed with no result. Digital angiography showed a tumoral blush supplied by the left inferior thyroid artery and located in close contact with the carotid artery. Venous sampling of the neck confirmed the left location of the adenoma and a third surgical intervention found the adenoma embedded in the left carotid sheath. This is an unusual case of parathyroid adenoma that necessitated the use of several imaging techniques.
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PMID:[Unusual location of a parathyroid adenoma: the carotid sheath]. 1641 82

Mediastinal parathyroid adenomas and thymomas can be resected via a transcervical approach, median sternotomy, or less invasive surgical option of video-assisted thoracoscopic resection and more recently by way of the da Vinci robot. We present a case of a mediastinal parathyroid adenoma in a 55-year-old female with primary hyperparathyroidism. MRI also confirmed a mediastinal adenoma localized on sestamibi scan. Significant laboratory values were elevated parathyroid hormone (PTH) of 171 pg/mL (normal range = 15 to 65 pg/mL) and calcium of 11.6 mg/dL (normal range = 8.5 to 10.5 mg/dL). Inability to hyperextend her neck due to cervical fusion made the transcervical approach unfavorable. To avoid a median sternotomy, we performed thoracoscopic resection of the adenoma via the left chest with the patient in a right lateral decubitus position. Three ports were placed; two in the anterior axillary line in the 4th and 6th intercostal spaces and one in the midaxillary line in the 5th intercostal space. Initial intraoperative PTH measurement was 192.9 pg/mL, and after adenoma removal the PTH level fell to 9 pg/mL. She was discharged home on postoperative day 1 without complications. At 3 months postprocedure, she remains asymptomatic with PTH and calcium levels within normal range. The 4 g, 2.4 cm intrathymic parathyroid adenoma had no evidence of malignancy. Thoracoscopic resection of an intrathymic parathyroid adenoma, a safe and less morbid alternative to median sternotomy, is an option when the transcervical approach is not viable.
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PMID:Thoracoscopic resection of a mediastinal intrathymic parathyroid adenoma. 1644 83


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