Developmental mechanism of juvenile coccygeal fibrosis (so-called coccygeal pad).

Coccygeal pad is a nodular lesion in the sacrococcygeal area, typically involving a proliferation of collagen bundles. The etiology and optimal treatment remain unclear. We investigated the etiology using a systematic review of the available published work, two cases that we examined and treated, and measurements of body pressure in a sitting position in seven healthy volunteers.

Unclassified epithelioid vascular tumor with hemangioendotheliomatous features and lymphatic differentiation.

Reported herein is an unusual vascular tumor that arose in the little finger of a 10-year-old boy. The tumor consisted of a vaguely demarcated nodular mass, which was located in the subcutaneous layer and measured 1 cm in diameter. Microscopic characteristic findings of this tumor were epithelioid nests, admixed with focal components with retiform features, intraluminal papillary tufts, and spindle cells.

Angiostatic effects of corticosteroid on wound healing of the rabbit ear.

Wound healing is a complex biologic process with initial inflammation, granulation tissue formation, and matrix remodeling. We observed the relation between angiostatic effects and corticosteroid administration time in the rabbit ear chamber. Angiogenesis in the chamber was studied using a microscope-television system.