A firm, poorly circumscribed soft tissue tumor occurred in the frontal and occipital or temporal musculature of four mature dogs aged 7-12 years. Radiographically, many nodular or stippled densities were scattered throughout the soft tissue mass, and the cranial bones were eroded. The tumor was characterized by nodular aggregations of proliferating chondrocytes surrounded by calcified matrix or chondroid ground substance. The intervening stroma was fibrous. These infiltrating fibrous lesions with calcified metaplastic cartilage have not been reported previously in the dog and are similar to calcifying aponeurotic fibroma in man.
KeasbeyL. E.FanselauH. A.:
The aponeurotic fibroma.
Clin. Orthop.19:
115–131
(1961).
8.
LichtensteinL.GoldmanR. L.:
The cartilage analogue of fibromatosis. A reinterpretation of the condition called “juvenile aponeurotic fibroma.”Cancer17:
810–816
(1964).
9.
MoultonJ. E.:
Tumors in domestic animals,
pp. 8 and
210
(University of California Press,
Berkeley1961).
10.
Rios-DalenzJ. L.KimJ. S.McDowellF. W.:
The so-called ‘juvenile aponeurotic fibroma.’Amer. J. clin. Path.44:
632–635
(1965).
11.
StewartJ. B.EnzingerF. M.:
Case for diagnosis. Juvenile aponeurotic fibroma.
Milit. Med.136:
5
(1971).
