Biochemical assessment of bone disease in multiple myeloma.

In patients with multiple myeloma, with moderate and severe bone disease, the urinary hydroxyproline excretion was disproportionately elevated with respect to the activity of bone isoenzyme of alkaline phosphatase when compared with the relationship between the variables observed in 58 age- and sex-matched controls and in 50 healthy young subjects. A significant positive correlation was found between urinary hydroxyproline excretion and the clinical variables related to the extent of bone involvement in multiple myeloma (X-rays, patient's performance status, anaemia). In 9 out of 13 patients with moderate and severe bone disease the chemotherapy-induced remission was associated with a significant (p less than 0.

Relationship of plasma tartrate resistant acid phosphatase to the bone isoenzyme of serum alkaline phosphatase in hyperparathyroidism.

In 46 patients with primary hyperparathyroidism, in 21 non-dialysed patients with advanced renal failure, and in 52 patients on hemodialysis, a significant positive correlation was found between bone isoenzyme of serum alkaline phosphatase and plasma tartrate resistant acid phosphatase. In primary hyperparathyroidism, a significant positive correlation was found between the radiological degree of osteodystrophy and the biochemical parameters of bone remodelling. After removal of the parathyroid adenoma, only the tartrate-resistant acid phosphatase decreased to normal limits.

Primary aldosteronism -- screening, diagnosis and therapy.

Criteria for the screening, diagnosis and therapy of primary aldosteronism (PA) were defined on the basis of its symptoms analysis in 40 PA patients. A diagnosis of PA was proved in 4.12% of 970 patients admitted for arterial hypertension.

Relationship of the activity of the bone isoenzyme of serum alkaline phosphatase to urinary hydroxyproline excretion in metabolic and neoplastic bone diseases.

A significant correlation between the activity of the bone isoenzyme or serum alkaline phosphatase and the urinary hydroxyproline excretion in osteomalacia, osteoporosis, primary hyperparathyroidism with osteodystrophy, Paget's disease, secondary bone tumours, and in a control group was found (P less than 0.001). This close correlation was not observed between these variables in patients with active acromegaly.