this study is a survey type of work on the plant tumors and their characteristics in genera1; special attention is given to those tumors which are caused by grobacterium tumefactions and also by plant hormones. the type of work and the methods are very much similar to the work of other investigators, but attempt was made to compare the results which are obtained upon the local varieties of a la...

The optic nerves are well demonstrated by high-resolution computed tomography. Involvement of the optic nerve by optic gliomas and optic nerve sheath meningiomas is well known. However, nonneoplastic processes such as increased intracranial pressure, optic neuritis, Grave ophthalmopathy, and orbital pseudotumor may also alter the appearance of the optic nerve/sheath on computed tomography. Cert...

High calcitonin levels noted on a totally healthy 49-year-old man participating in a calcitonin control project led to a presumptive diagnosis of medullary carcinoma. Complete thyroid studies augmented by selective catheterization and quantitative calcitonin studies confirmed the clinical impression of medullary carcinoma. Surgery was recommended and a total thyroidectomy was performed. On gros...

Making the correct diagnosis of an iris–ciliary body tumor can be challenging. A 35-year-old woman sought care because of a growing amelanotic lesion that destroyed the iris root and produced a large ciliary body mass. She had a history of systemic lupus erythematosus. The tumor was completely removed with an iridocyclectomy, which revealed that the plasma cells had been producing a large amoun...