intramembranous ossification

例句：

1. 1. This condition is characterized by the formation of bone within the muscle tissue.
   这种状况的特点是在肌肉组织中形成骨。
2. 2.The patient's condition worsened after surgery, leading to intramembranous ossification.
   患者的病情在手术后恶化，导致膜内骨化。
3. 3.The pathological process of intramembranous ossification is still not fully understood.
   膜内骨化的病理过程仍然不完全理解。