RT Journal
A1 ROGERS SS
T1 GRanular cell myoblastoma of the anterior rectus sheath
JF Archives of Surgery
JO Archives of Surgery
YR 1949
FD April 1
VO 58
IS 4
SP 450
OP 454
DO 10.1001/archsurg.1949.01240030458004
UL http://dx.doi.org/10.1001/archsurg.1949.01240030458004
AB GRANULAR cell myoblastoma and rhabdomyoma are the two tumor types, both rare, arising from striated muscle cells. The myoblastomas were described originally as "Myoblastenmyome" by Abrikossoff1 in 1926. At that time he regarded them as neoplasms due to faulty excessive regeneration subsequent to injury of striated muscle. In 1931, realizing that some of these tumors arose in areas devoid of striated muscle, he postulated2 their origin from primitive myoblasts representing embryonal rests. He classified myoblastomas into four histopathologic types: (1) those consisting of granular myoblastic cells without the presence of striation, (2) the same type with the addition of occasional faint striations, (3) hypertrophic forms consisting of large multinucleated cells and (4) malignant myoblastic myomas consisting of pleomorphic cells, some areas showing differentiation and striations and others frankly sarcomatous in appearance.On gross examination, myoblastomas are tumors varying in diameter from 0.5 to 2 cm., although they occasionally