Modern hydrogeological research uses numerical modelling, which is most often based on the finite difference method (FDM) or finite element method (FEM). The present paper discusses an example of application of the less frequently used FEM for simulating groundwater circulation in the vicinity of the intake at Świniarsko near Nowy Sącz. The research area is bordered by rivers and watersheds, and within it, two well-connected aquifers occur (Quaternary gravelly-sandy sediments and Paleogene cracked flysch rocks). The area was discretized using a Triangle generator, taking into account assumptions about the nature and density of the mesh. Rivers, wells, an irrigation ditch and infiltration of precipitation were projected onto boundary conditions. Conditions of groundwater circulation in the aquifer have been assessed based on a calibrated model, using water balance and a groundwater level contour map with flow path lines. Application of the program based on FEM, using smooth local densification of the discretization mesh, has allowed for precise mapping of the location of objects that significantly shape water circulation.

Biphosphonate-related osteonecrosis of the jaw (BRONJ) is a common complication of the therapy of malignant cancers. Drugs improve bone density and reduce hypercalcaemia in patients with primary tumours, as well as their metastases to the bones. A characteristic feature are emerging foci of osteonecrosis of the jaws, with secondary infection which is often actinomycotic. Actinomyces are Gramm-positive bacteria which colonize the mucous membrane and in favourable conditions are the cause of inflammation. BRONJ appears spontaneously or may be a consequence of surgical treatment in the area of the jaws. The case is presented of an 82-year-old woman after hysterectomy due to a cancerous lesion who had taken ibandronic acid for a long time. Because of the severe pain in the mandible and the advanced disease, surgical sequestration of the necrosis and antibiotic treatment of the actinomycosis were necessary.

Gorlin-Goltz syndrome (GGS) is a genetic disease of autosomal dominant inheritance. It is characterized by the presence of multiple basal-cell carcinoma foci, odontogenic keratocysts and anomalies of the skin, eyes, bones, nervous and endocrine system. Patients are predisposed to various neoplasms, such as medulloblastoma and fibrosarcoma. Rare incidence of the syndrome and multi-organ manifestations require providing patients with multi-specialist care, in particular, with dermatologists, dentists and surgeons. This is a case report of a 63-year-old patient with Gorlin-Goltz syndrome treated for odontogenic keratocysts of the mandible and basal-cell carcinoma. The report includes an extensive review of the GGS with regard to its etiology, features, clinical examination, diagnostic criteria and treatment modalities.