Abstract
Objective and Importance: Partial Labyrinthectomy Petrous Apicectomy (PLPA) is a relatively new approach to the petroclival region. A morphometric study was done to compare PLPA and Retrolabyrinthine approaches. Methods: Ten fixed cadaver heads (20 sides) were dissected and examined using 3x to 40x magnifications. Mastoidectomy exposed the semicircular canals (SCC). The superior canal was removed completely. The posterior canal was partially removed with preservation of the vestibular aqueduct. The bone above the internal auditory canal (IAC) was drilled to the petrous apex. Temporal craniotomy was performed. The dura was opened. Meckel's cave was opened to mobilize the trigeminal nerve. Results: Due to the removal of the SCC and bone above the IAC, there was a significant gain of space with limited temporal lobe and cerebellar retraction (see tables). Conclusion: PLPA enhances exposure with preservation of hearing. Although hearing preservation cannot be evaluated based on cadaveric studies, this approach has been described in the literature.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 7 |
| Number of pages | 1 |
| Journal | Skull Base |
| Volume | 11 |
| Issue number | SUPPL. 1 |
| State | Published - 2001 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Clinical Neurology