'Crystalline' collagen production by an unusual benign soft tissue tumour ('amianthioma').

The morphology of a benign soft tissue tumour producing nodules of collagen in 'crystalline' form is investigated by light and electron microscopy. The distinctive and peculiar arrangement of collagen fibres into bundles of radiating 'crystals' is described. This appearance has not been documented in the literature on soft tissue tumours before, as far as the author bas been able to ascertain.