65 y/o male, medically free C/o painful lump on the botton o | Figure 1

65 y/o male, medically free

C/o painful lump on the bottom of the RT big toe x 2 months associated with pain especially when walking.

Its getting worse that wearing shoes is painful.

No fever, no redness, no hx of trauma.

There is a 2x2 lump on the plantar aspect of the Rt big toe, associated with moderate tenderness.

Dermatological exam revealed a firm, non-fluctuant mass on the plantar aspect of the great toe.

Differential Diagnosis?

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