Pseudosarcomatous Changes in Antrochoanal Polyps

Ancient Neurilemmoma (Schwannoma)

“…Nucelar changes similar to those found in the neurilemmomas of the present series have been described in other benign, soft tissue tumours such as ancient spindle-cell lipoma (Angerwall et al 1976), myxoid polyps of the vagina (Norris & Taylor 1966) and antrochoanal-nasal polyps-polyposis (Smith et al 1974, Compagno et al 1976) and confused with sarcoma. These nuclear changes without mitotic activity seem to be regressive in nature.…”

Benign Nasal Polyps Causing Bone Destruction in the Nasal Cavity and Paranasal Sinuses

“…Recognition of the association of benign nasal polyposis with sinus expansion and destruction is important regarding selection of treatment. In 1974, Smith, et al 6 reported two cases of antrochoanal polyps that exhibited histologic f ea tu res of malignancy. In one, the polyps showed an unusual proliferation of histiocytes and in the other they had atypical fibroblasts.…”

Nasal Cavity and Paranasal Sinuses

“…Antrochoanal polyps typically have prominent fibrous stroma surrounding thick-walled blood vessels 2 [7]. In addition, scattered, enlarged, stromal cells with hyperchromatic nuclei are not an uncommon finding in this type of polyp [235]. Those polyps that arise in the maxillary antrum and extend into the middle meatus projecting anteriorly are known as antronasal polyps.…”