Phalanx showing Chondroblastoma
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Object numberGC.13866
TitlePhalanx showing Chondroblastoma
Creator James Alexander (1911-1997) Ross
DescriptionSpecimen and Histological Glass Slide x9
The tumour which involves the terminal phalanx of the toe is globular, slightly lobulated or bossed and on the plantar surface there is superficial ulceration. The nail of the toe shows a gross curvature deformity. On section the tumour is seen to be sharply defined with an apparent capsule, ovoid in shape and measures some 4.5 x 3.5 cms. The cut surface shows two types of tissue, a more fleshy, homogeneous tissue which appears to run as bands of trabeculations, the other areas illustrate a tissue of clearly myxomatous character. In the centre of two of these areas there is calcification. There is no evidence in any area of invasive infiltration. In certain of the more fleshy strands, particularly close to the tip of the toe, small cysts have formed.
Microscopical examination shows a very varied picture. There are defined areas of cartilage sharply demarcated from sheets of very cellular tissue consisting of small, rounded or fusiform cells. In other areas, small foci of tissue cells show early differentiation into cartilage with some osteoid change and scattered osteoclasts. In one area, there is extensive calcification. The vascularity and haemorrhage apparently produced the yellowish appearance of some areas. There is considerable hyaline cartilage matrix.
This conforms to what is now usually described as a chondroblastoma. In spite of the cellularity, the apparent absence of mitoses indicates its relatively benign condition, with rare recurrence or potential metastatic deposits.
Production date 1969
Production periodTwentieth century, mid
Object nameBONE, phalanx
Object categoryAnatomical, specimen, HISTOLOGY
Dimensions
- Slide Length: 7 cm
Slide Width: 2.5 cm