Parathyroid adenomas studied by digital subtraction angiography.

Eighteen patients who had elevated serum calcium and parathormone levels were prospectively studied with intravenous digital subtraction angiography (DSA). Intravenous DSA of the neck and mediastinum was performed in the anteroposterior, the left anterior, and the right anterior oblique projections. The study was considered positive if an abnormal blush or blood supply was noted.

Malignant myositis ossificans: occult gastric carcinoma presenting as an acute rheumatic disorder.

A patient developed ossifying skeletal muscle metastases from a primary gastric mucin-producing adenocarcinoma. The unusual nature of skeletal muscle metastases and the inflammatory-like syndrome associated with heterotopic ossification is reviewed. It is suggested that this case of 'neoplasm-induced post-traumatic myositis ossificans' may be caused by the interaction of local haemorrhage and thrombosis, mucin-producing tumour implants, and the presence of large quantities of gamma-carboxyglutamic acid, an amino acid associated with the calcification of bone matrix formation.

Bone-forming gastric metastases in muscle-computed tomographic demonstration.

Bone-forming metastases to soft tissues and muscle are a rare entity. An unusual case of heterotopic ossification occurring within metastases to muscle arising from a primary gastric adenocarcinoma is reported. No bone was found in the primary gastric malignancy.