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Cutaneous chondroma and osteoma of the skin: causes, symptoms, diagnosis, treatment
Last reviewed: 07.07.2025
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Cutaneous chondroma is localized mainly on the fingers and toes, less often in other parts of the limbs, but, as a rule, near the joints.
Pathomorphology. In the dermis or hypodermis there is compact, sometimes in a fibrous capsule, cartilaginous tissue, in the hyaline-basophilic stroma of which lie typical cartilaginous cells with large, sometimes polymorphic nuclei, or binuclear, containing glycogen in their cytoplasm.
Histogenetically, in almost all cases, chondromas can originate from germ cells of cartilaginous rudiments, from exostoses, or appear as a result of chondroid metaplasia of pluripotent mesenchymal cells.
Osteomas of the skin, or cutaneous osteosis. Ossification of the skin can be primary and secondary. The first type includes the so-called multiple bone osteoma of the scalp, described by H. Tritsch et al. (1965), and of the face.
Secondary ossification, or bone metaplasia of the skin, is the process of transformation of the connective tissue of the dermis into bone as a result of chronic productive inflammation in scars and scleroderma, as well as dystrophic changes in it.
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