Spontaneous rupture of an ovarian dermoid cyst associated with intra-abdominal chemical peritonitis: characteristic CT findings and literature review.

A case of ruptured ovarian dermoid is documented including the characteristic CT findings of chemical peritonitis based on the fatty peritoneal fluid content similar to that found in fatty dermoids.

Anatomical variations of the lateral nasal wall and paranasal sinuses: A CT study for endoscopic sinus surgery (ESS) in Thai patients.

Computerized tomography (CT) of the paranasal sinuses is usually required prior to endoscopic sinus surgery. CT demonstrates both the extent of disease(s) and the anatomical variations that may predispose to rhinosinusitis and nearby vital structures that iatrogenic damage can be avoided. The authors retrospectively reviewed 88 CT scans of paranasal sinuses and orbits, performed at Srinagarind Hospital between January 1995 and February 1997. Only adult patients were included. The study showed the presence of frontal sinuses in 88% of cases (95%CI 82.3-92.5%), agger nasi cells in 92% (95%CI 87-95.6%), concha bullosa in 34% (95%CI27.1-41.6%), Haller's cell in 24% (95%CI 17.8-30.9%), Onodi cell in 25% (95%CI 19.8-32.1%), dehiscence of the internal carotid artery in 10.2% (95%CI 6.2-15.7%) and the optic canal in the sphenoid sinus in 18.2% (95%CI 12.8-24.7%). The most common olfactory fossa was type II. Haller's cell was a coincident finding not a risk factor for maxillary rhinosinusitis. Concha bullosa was a non-statistically significant, risk factor for maxillary rhinosinustis.

Tracheal agenesis: a case report.

Tracheal agenesis is a rare congenital anomaly and typically has fatal consequences. Associated congenital malformations are present in 90 per cent of cases, most frequently affecting the cardiovascular or gastrointestinal systems and the genitourinary tract. Affected infants lack prenatal symptoms and usually present with severe respiratory distress, absence of audible crying and difficult or impossible endotracheal intubation, leading to failed airway management and irreversible cerebral hypoxia. The authors report an infant with tracheal agenesis who presented with respiratory failure after birth. The clinical features, embryology and classification schemes are presented in the hope of increasing awareness, thus making earlier diagnosis possible and thereby improving survival.