The Dabska tumor: a thirty-year retrospect.

The Dabska tumor is a rare low-grade angiosarcoma also known as malignant endovascular papillary angioendothelioma of childhood. It primarily affects the skin of children and has a distinctive histologic pattern of anastomosing vascular channels with intravascular papillary outpouchings projecting, sometimes, in a glomerulus-like pattern, into a lumen lined by atypical columnar endothelial cells. Since its original description 30 years ago by one of us, knowledge in this area has expanded.

Mesenchymal chondrosarcoma. A clinicopathologic analysis of 35 patients with emphasis on treatment.

Almost a quarter of a century has passed since mesenchymal chondrosarcoma, a rare, insufficiently studied and still poorly understood cartilage neoplasm has been described. Based on 35 cases diagnosed and treated at this Cancer Center, this study found 20 males and 15 females with an average age of 26 years (range, 6-70 years). All but five of the tumors arose in the skeleton in the femur, humerus, and ilium in five cases each, while the os calcis (a rare site for any other osseous tumor) gave rise to this tumor in four instances.

Decrease of mast cells in the stroma of human cancer.

The number of mast cells in the stroma of human squamous cell cancer -- keratoblastif cum, paraepidermale and male diffusa was 2-30 times lower than in the stroma o-normal squamous epithelium or in the connective tissue distant from neoplastic epithelium. These differences are statistically highly significant. The reduction of mast cel, number apparently might be the result of exhaustion of heparin-containing granules which interfere with tumor growth.