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The gathering and recovery of cells and cellular material from the mucosa in the esophagus for cytological and histological analyses.

The EsophaCap® Swallowable Cellular Retrieval Device is a non-sterile, non-endoscopic, singleuse Esophageal cell sampling device. The EsophaCap® is composed of an open-cell polyether polyurethane foam sphere attached to a polyester tether cap. The open-cell foam sphere ranging in diameter sizes from 20 mm to 35mm is compressed and encapsulated within a vegetable (hypromellose (HPMC)) capsule. When swallowed the EsophaCap® capsule dissolves releasing the foam sphere. The foam sphere expands to form a cytology and cellular retrieval device that allows a circumferential "bottle brush" collection using the expanded "open cell" foam sphere. The radiopaque polyester tether/stylus is used to slowly withdraw the foam sphere through the esophagus and then to subsequently retrieve the foam sphere with the cellular sample.