1. Tumors of the patella are very rare, only nineteen definite cases having been reported in the literature. To these might be added the first two in Schwartz's list of twelve cases, no other mention of which could be found, the two specimens mentioned in the discussion of D'Arcy Power's case, and Baldwin`s unreported case, making a total of twenty-four. The author's case makes the twenty-fifth and is the first benign cyst of the patella recorded.
2. All the common tumors of bone have been found in the patella except myxoma.
3. The course, the treatment, and the prognosis of patellar tumors are the same as for similar growths in the rest of the bony framework.