Colour Atlas of the Anatomy and Pathology of the Epitympanum by T. Palva

By T. Palva

This atlas provides an in depth documentation of some of the best booths of the center ear. New microdissection methods were built, most significantly anterior microdissection. as well as the tympanic hollow space, this process permits an instantaneous view into the anterior membrane of Prussak's area, the anterior floor of the tensor fold, and the supratubal recess, components now not explored prior. The average and hitherto unknown auxiliary aeration and drainage pathways are proven intimately. Aeration of Prussak's area is documented utilizing either microdissection and serial sections; those pathways from the mesotympanum or from the reduce lateral attic are self sustaining of the tympanic isthmus. The pathology because of power irritation at the aeration and drainage routes can be documented, and new surgical microdissection equipment for elimination of the tensor fold are defined.

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A membrane defect of this size provides a large and effective auxiliary aeration and drainage pathway from the anterior epitympanum to the supratubal recess (R) and eustachian tube. ly prevents communication between the supratubal recess, part of the mesotympanum, and the anterior epitympanum (fig. 56, 57, 60). This means that the only aeration and drainage pathway in the majority of ears is through the tympanic isthmus. We have found a membrane defect in this fold, allowing for direct attic aeration from the supratubal recess, in around 25% of microdissections (fig.

Series G, adult case 2, right ear. a A superior view of the epitympanum discloses a few postinflammatory tissue strands in the anterior portion of the tympanic isthmus (horizontal arrow), the posterior portion (oblique arrow) appears free. The lateral incudomalleal fold is intact but indrawn and contains a few thicker areas (curved arrow). The lateral malleal space (vertical arrow) is normal and a posterior incudal fold closes the auxiliary aeration pathway via the incu- dal fossa (open arrow).

Nevertheless, as we will see later in connection with the AFCC-induced sterile otitis media of the neonate, their remnants may have a definite role in that they provide fixation points for AFCC in the tympanic isthmus. 32 Normal Anatomy by Serial Sections In the absence of inflammatory changes, microdissection can instantly provide an idea of the compartments compared to serial sections (fig. 44), necessitating examination of a large number of slides. 2 mm in thickness, generally can be seen only partially in one single serial section in adults (fig.

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