Benign tumors of the thymus gland are uncommon. The rarity of a thymolipoma was noted by Unver5 in 1957 when he reported a case and found only 13 other cases reported in the literature. The symptoms that the patient commonly notes are those due to the bulk of the tumor.2 The largest thymolipoma that has been excised was 6,000 gm.
The unusual pathological appearance of the thymolipoma has been reported by Guilfoil,3 who noted that the thymolipoma is a true mixed tumor. There is fatty tissue derived from the mesoderm and thymic tissue from the endoderm. There has been no reported instance of a thymolipoma undergoing malignant degeneration, although it is a possibility.
Report of Case
A 34-year-old white man was admitted to the hospital on Feb. 3, 1960, complaining of discomfort in his chest, accompanied by a sensation of "something moving about" in the chest for
FREDELL CH, PERLMUTTER AD. ThymolipomaReport of a Case. Arch Surg. 1961;83(6):898-900. doi:10.1001/archsurg.1961.01300180098019