ABSTRACT
A 9.5-year-old girl had popliteal arterial and venous compression by a distal femoral osteochondroma. Magnetic resonance imaging demonstrated the relation of the vessels to the osteochondroma and a three-phase bone scintigram showed asymmetry of arterial perfusion and evidence of venous stasis.
Subject(s)
Arterial Occlusive Diseases/diagnosis , Femoral Neoplasms/diagnosis , Osteochondroma/diagnosis , Popliteal Artery , Arterial Occlusive Diseases/etiology , Child , Female , Femoral Neoplasms/complications , Femoral Neoplasms/diagnostic imaging , Humans , Magnetic Resonance Imaging , Osteochondroma/complications , Osteochondroma/diagnostic imaging , Radionuclide ImagingABSTRACT
The congenital subglottic hemangioma typically appears as an asymmetric subglottic narrowing or mass on frontal neck radiographs. Therefore, soft tissue neck radiography has been advocated as a definitive non-operative approach for diagnosing these lesions. However, we have noted similar asymmetric subglottic narrowing in patients with acquired subglottic cysts. These retention cysts occur following long-term intubation in the neonate. The mechanism probably involves subglottic fibrosis which obstructs glands with subsequent cyst formation. Acquired subglottic cysts typically appear as an asymmetric narrowing on frontal or lateral soft tissue neck radiographs. These lesions may produce airway compromise but are effectively treated by forceps or laser removal. Acquired subglottic cysts must be included in the differential diagnosis of asymmetric subglottic narrowing. The definitive diagnosis is made by direct laryngoscopy, not soft tissue neck radiograph.
