Growth rate, histolÃ3gica! course, and polymorphic enzyme pattern (glucose 6-phosphate dehydrogenase, glucose phos phate isomerase, and phosphofructokinase) were studied in eight childhood tumors xenotransplanted serially to nude mice. The growth rate of these tumors (three nephroblastomas, one hyper calcémierenal tumor, three rhabdomyosarcomas, and one malig nant histiocytosis) appeared stabl...

;Carcinoid' tumours of the rectum have been described which are classified on histological appearances into three main varieties: ;true' carcinoid or argentaffinoma, ;atypical' or non-argentaffin carcinoid, and ;composite carcinoid. The histogenesis of these tumours is discussed and it is suggested that non-argentaffin carcinoids of the rectum have an essentially similar histogenesis to certain...

Basal Cell Carcinoma is a common cutaneous malignancy, occurring primarily on the face . It has many histological variants. We present a case of a 71year old farmer with a nodule near outer canthus of the right eye, since six months. Histopathological examination of the excised nodule revealed a tumour composed of basaloid cells with an adenoid pattern of growth. Based on the histopathological ...

Medullary carcinomas both typical (MBC) and atypical (AMBC) are rare breast tumors that account for <5% of invasive breast carcinomas [1]. The diagnosis of medullary carcinoma is usually defined by histologic diagnostic criteria proposed by Ridolfi et al. [2]. These histopathological features include: syncytial growth pattern (>75%), absence of glandular structures, diffuse lympho-plasmacytic i...

diabetes mellitus is the most common cause of chronic renal disorders and end-stage kidney disease in developed countries. it is the major cause of dialysis and transplantation. failure in renal function causes wide disorders in the body. diabetes results in wide range of alterations in the renal tissue. it is believed that early histological changes in diabetic nephropathy are detectable 2 yea...

Sclerosing epitheloid fibrosarcoma is a rare, histologically well-defined member of adult fibrosarcoma group of soft tissue tumors. Its main histological features are nests and cords of rounded tumor cells surrounded by hyalinized collagenous stroma. Epitheloid appearance with marked sclerosis and infiltrating growth pattern, along with occasional immunohistochemical positivity for epithelial m...

Non-Hodgkin's lymphoma (NHL) is the third common malignant lesion of the oral region. Plasmablastic lymphomas are rare, aggressive neoplasms occurring mostly in human immunodeficiency virus (HIV) infected individual which accounts for approximately 2.6% of all NHL. It usually presents as a diffuse growth and with diffuse pattern of histological presentation. It is very difficult to differentiat...

Previously, we generated a preclinical mouse prostate tumor model based on PSA-Cre driven inactivation of Pten. In this model homogeneous hyperplastic prostates (4-5m) developed at older age (>10m) into tumors. Here, we describe the molecular and histological characterization of the tumors in order to better understand the processes that are associated with prostate tumorigenesis in this target...