Abdomen – Strong MyoD1 immunostaining in tumor cells of a sarcoma NOS.

Abdominal wall – MyoD1 negative myxofibrosarcoma.

Bone – MyoD1 negative chondrosarcoma.

Bone – MyoD1 negative peripheral neuroectodermal tumor (PNET).

Bone – Weak MyoD1 staining of few cells in an osteosarcoma.

Colon – MyoD1 negative colorectal adenocarcinoma.

Kidney – MyoD1 negative angiomyolipoma.

Kidney – MyoD1 negative clear cell renal cell carcinoma.

Lung – MyoD1 negative malignant mesothelioma.

Pelvis – MyoD1 negative paraganglioma.

Prostate – MyoD1 negative adenocarcinoma (Gleason 3+3=6).

Retroperitoneum – MyoD1 negative lipoosarcoma.

Retroperitoneum – MyoD1 negative malignant peripheral nerve sheath tumor (MPNST).

Retroperitoneum – Strong MyoD1 positivity of most tumor cells of a sarcoma NOS.

Skeletal muscle – Moderate to strong MyoD1 immunostaining of all cells in a rhabdomyosarcoma.

Skeletal muscle – Moderate MyoD1 immunostaining of all cells in a rhabdomyosarcoma.

Skeletal muscle – MyoD1 immunostaining of tumor cells is not detctable in this rhabdomyosarcoma case.

Skeletal muscle – Strong MyoD1 positivity of all cells in a rhabdomyosarcoma.

Thorax – MyoD1 negative dermatofibrosarcoma protuberans.

Uterus – MyoD1 negative Leiomyosarcoma.