Ciliary body adenoma after application of mitomycin.

Purpose: To describe a ciliary body tumor that was detected in a rabbit eye.

Methods: For a specific experiment, the rabbit underwent trabeculectomy with mitomycin. The eye was evaluated by electron microscopy 5 weeks following surgery.

Invasive potential of "noninvasive" human bladder carcinoma. An electron microscopy study.

In classification systems for bladder tumors, a clear distinction between superficial noninvasive and urothelial carcinoma invasive to the lamina propria is of prognostic and therapeutic significance. However, a subset of tumors classified as noninvasive is characterized by increased recurrence and progression rates. This study was done to look for ultrastructural characteristics in histopathologically noninvasive urothelial bladder carcinomas that might predict an unfavorable prognosis.

Axons in human choroidal melanoma suggest the participation of nerves in the control of these tumors.

Purpose: To furnish morphologic evidence of autonomic nervous system influence on choroidal melanoma.

Design: Histopatholgic case report.

Methods: In the enucleated eye of a 72-year-old woman, portions of a mixed-cell choroidal melanoma were processed for electron microscopy, and ultrathin sections were screened painstakingly under magnifications of x13,000 and x23,000.

Nerve fibers in tumors of the human urinary bladder.

Abstract. Exophytic tumors of the urinary bladder were examined by means of transmission electron microscopy for the presence of neural tissue because, as yet, there has been hardly any discussion of a neuronal component in the biology of neoplasms. In the stroma and rarely in the epithelium of bladder tumors, fine nerve strands were found to be irregularly distributed.