The term "carpe bossu" has been coined to bony eminence at the base of II or III metatcarpal, sometimes expanding to the trapezoid and capitate dorsally. The condition is usually symptom free. Pain is spontaneous or elicited by overuse and aggravated by palmar flexion of the wrist. The subluxation of extensors tendons overlying the boss may occur in more cases. Bony eminence, regular in shape is evident on lateral radiographs. Conservative treatment usually renders remission of symptoms but if it fails surgery is indicated.