PMC3658237_01
(A) Magnetic resonance image (T1-weighted) of the hand reveals a roughly oval, gently lobulated mass located in the proximal phalanx of the third finger (arrow). (B) Micrograph of a fragment obtained from curettage shows chondrocytic proliferation with a lobular pattern of growth and focal granular calcifications. The chondrocytes were normal without any morphologic sign of malignancy. (C) Micrograph of a myxoid area (arrow) with spindle-shaped cells in a basophilic matrix. (D) Under low power, areas of osteoid matrix deposition are visible focally within the lesion (arrow).
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Magnetic resonance imaging showed the presence of an osteolytic lesion with polycyclic margins compatible with chondroma (Figure 1A). Areas of myxoid stroma with scattered cells having no atypical features were also present (Figure 1B). In areas with a conspicuous myxoid component, cells appeared stellate and spindle-shaped (Figure 1C). Interestingly, focal deposits of osteoid within the lesion were also seen (Figures 1D and 2).
Osteoid matrix deposition.
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Interestingly, focal deposits of osteoid within the lesion were also seen (Figures 1D and 2).