Aggressive Types of Malignant Thyroid Neoplasms.

Differentiated thyroid cancer (DTC) includes many subtypes, which demonstrate favorable to aggressive behavior. During the past decades, efforts have been made to describe aggressive thyroid cancers. Within DTC, aggressive variants constitute rare entities with unique histopathological features and compromised survival, as local and distant metastatic disease is frequent.

Mönckeberg sclerosis in patients with thyroid papillary carcinoma.

Background: Mönckeberg sclerosis is a form of calcification of the tunica media of small and medium size arteries. It occurs more often in the peripheral arteries of the lower limbs and it has been associated with diabetes and renal disease. Although there are a few reports of Mönckeberg sclerosis in thyroid vessels, there are no data regarding its significance in thyroid disease.

A Rare Manifestation of Secondary Hyperparathyroidism Due to Brown Tumors: A Case Report.

Purpose: Brown tumors, also known as cystic fibrosa, are rare, benign, osteolytic, fibrotic lesions of the bones that occur secondary to hyperparathyroidism. They are caused by increased osteoclastic activity leading to an abnormal bone metabolism.

Case Description: Here, we present the case of a 58-year-old male, who presented with painful bony lesions, initially attributed to metastatic disease.

Biomarkers in neuroendocrine neoplasms.

Neuroendocrine tumors are a heterogenous group of rare neoplasms with different morphological features, immunophenotype, molecular profile, and clinical presentation. They can derive from any neuroendocrine cell throughout the body, but the majority of NENs is developed in the gastrointestinal tract. They can be divided into two groups, based on hormone secretion, functioning and non-functioning NENs.

Down regulation of the inverse relationship between parathyroid hormone and irisin in male vitamin D-sufficient HIV patients.

Purpose: Infection with the human immunodeficiency virus (HIV) predisposes to endocrine disorders, manifesting as a metabolic phenotype that affects the entire adipose-musculoskeletal unit (AMS). The present cross-sectional study aimed to investigate differences in irisin and adiponectin concentrations between people living with HIV and healthy controls, as well as to explore potential correlations between the levels of the aforementioned adipokines and markers of calcium homeostasis.

Methods: 46 HIV-infected individuals and 39 healthy controls (all men) were included in the study.