The poster above you is incorrect in many respects, but your statement that "cancer doesn't grow in muscle cells" is also misguided. There are numerous muscle

The poster above you is incorrect in many respects, but your statement that "cancer doesn't grow in muscle cells" is also misguided. There are numerous muscle and muscle adjacent tumors that arise at various levels of differentiation, ranging from those that literally mean "muscle cancer" such as myosarcomas or leiomyosarcoma (smooth muscle), to those affecting adnexa such as fibrosarcomas or chondrosarcomas, or less differentiated mesenchymal neoplasms, depending on how far you want to zoom out on a whole realm of oncology. Even fat cells can become cancerous (liposarcoma). In essence any cell type you can stick in a burger has a cancerous correlate, but again the idea of cultured cells being equivalent to eating tumors is incorrect as much as it is amusing.