{'fraction_non_alphanumeric': 0.015748031496062992, 'fraction_numerical': 0.0, 'mean_word_length': 5.411764705882353, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
X-Ray of the Month Chondromyxofibrosarcoma of the Nasal Cavity

Sinus x-rays are usually obtained for preliminary evaluations of nasal lesions. The majority of tumors in the nasal cavity, however, are not visible on these films because of superimposition of normal anatomical structures. Polytomography is the method of choice for detailed evaluation of lesions in the nasal cavity and sinuses. Large benign lesions usually displace and attenuate bony structures while malignant tumors cause lytic bone destruction with or without sclerosis. Angiography is useful in the evaluation of vascular lesions. Computerized axial tomography is used to assess extension of a lesion into the orbit, intracranial cavity, the pterygomaxillary region and infratemporal fossa.