tumor capsule
Fibrous or pseudo-capsular layer surrounding certain tumors, important for surgical planning.
Full Definition
The tumor capsule is a fibrous layer that may form around certain types of tumors, creating a potential plane of dissection during surgery. While some tumors develop true capsules, others may have pseudo-capsules formed by compressed surrounding tissues. The presence and integrity of a tumor capsule influences surgical approach, as capsulated tumors may be amenable to enucleation or capsule-preserving resection. However, capsules are not reliable barriers against tumor spread, and microscopic tumor extension beyond the capsule is common. The surgical handling of capsulated tumors requires careful technique to avoid capsular rupture and tumor spillage.
Usage
Usage note: Distinguish between true capsules and pseudo-capsules when describing tumor characteristics.
In Context
- "The tumor capsule appeared intact on imaging, suggesting potential for enucleation." — Preoperative imaging report
- "Histology revealed tumor cells extending beyond the capsule into surrounding parenchyma." — Pathology report