RENAL CELL CARCINOMA METASTASIS TO THE SINONASAL CAVITY: CASE REPORT.

Renal cell carcinoma accounts for 3% of all adult malignant tumors. Common sites of metastases are lungs, bone, liver, brain and adrenal glands. Metastatic disease to the head and neck ranges from 15% to 30%.

Alzheimer and Lewy body pathology or Creutzfeldt-Jakob disease.

The objective of this work is to describe the neuropathological findings of a patient clinically presenting with rapidly progressive nonspecific neurological symptoms suggestive of Creutzfeldt-Jakob disease. Methods used were clinical description with laboratory analyses, repeated electroencephalogram, cerebral computed tomography, magnetic resonance imaging studies and details on neuropathological work-up. Neuropathological examination excluded Creutzfeldt-Jakob disease.

Non-functioning parathyroid gland carcinoma: case report.

Parathyroid gland carcinoma is a rare malignancy. The tumor is mostly functioning, causing severe hyperparathyroidism, with high serum calcium level and severe bone disease. Non-functioning parathyroid carcinomas are extremely rare.

[Tolosa-Hunt syndrome: a case report].

Tolosa-Hunt syndrome is a nonspecific granulomatous inflammation of the cavernous sinus, superior orbital fissure and apex of the orbit. It involves episodes of unilateral orbital pain which may last several weeks, lesions of cranial nerve III, IV or VI, and rarely II, V, VII and VIII. It is characterized by remissions and exacerbations, and can cause permanent neurological disorder of the affected nerves.

[Expression of bcl-2, Ki-67 and p-53 in uveal melanomas].

Aim: To investigate expression of proliferative markers bcl-2, Ki-67 and p-53 immunocomplexes in uveal melanoma cells; and to establish whether the intensity of expression correlates with the pathological level of invasion (pT), which would result in prognostic significance.

Methods: Thirty cases of primary uveal melanomas of two different levels of invasion (pT2 and pT3); indirect PAP immunoenzyme method and three step ABC/AP method. The intensity of the reaction was evaluated by a semiquantitative method as negative (-), weakly positive (+), modestly positive (++) and strongly positive (+++).

[Bone histology in postmenopausal osteoporosis--variations in cellular activity].

Aim: Modern understanding of the etiology of postmenopausal osteoporosis is based on the imbalance between bone resorption and formation due to estrogen deficiency, which may take several forms and combinations of decreased and/or increased activity of both or one cell type. Studies of postmenopausal osteoporosis have pointed to the existence of heterogeneity in the remodeling imbalance. Bone histology analyzed in a group of women with established postmenopausal osteoporosis undergoing bone biopsy is part of the diagnostic procedure.