Concha

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Concha

 

a semidome that serves as the ceiling of the semi-cylindrical portions of buildings (an apse or niche). The concha, which originated in eastern Hellenistic architecture, was popular in Roman and Byzantine architecture and in medieval Christian religious buildings. It was often filled with mosaics or frescoes depicting Christ, the Virgin Mary, and the Christian saints.

concha

1. The semidome vaulting of an apse; also called a conch.
2. In Spanish architecture and its derivatives, a decorative element in the form of the interior of a sea scallop; see shell-headed.
References in periodicals archive ?
A concha bullosa of the middle turbinate most commonly drains into the anterior ethmoid sinus.
Following the removal of the lateral lamella, a bony enlargement within the concha bullosa was gently separated from the inner surface of the medial lamella, preserving the middle turbinate attachment to the lamina cribrosa.
Examination findings in 30 patients that described respiratory distress Female Male Total (n: 19) (n: 11) (n: 30) Septal deviation 16 10 26 Concha bullosa 2 7 9 Inferior turbinate hypertrophy 8 9 17 Nasal crest 13 11 24 Decreased cartilage resistance 6 3 9 Table II.
The Incidence of Concha Bullosa and Its Relationship to Nasal Septal Deviation and Paranasal Sinus Disease.
Anatomical variations Number % 95% Confidence Total = 360 Interval Pneumatized Agger 175 49% (44-54) nasi cells Concha bullosa 177 49 (44-54) Paradoxical bending of 45 13 (10-17) middle turbinate Infrabullar Cells 35 10 (7-13) Suprabullar Cells 47 13 (44-54) Asymmetry ethmoidal 115 32 (29-37) roof Asymmetry of 69 19 (5-23) ethmoid fovea Anterior ethmoidal 51 14.
DNS was the most common variation, 20 (26%); Concha bullosa (CB), 14 (18.
The incidence of concha bullosa in this study was 14% Rt and 28%--Lt and Rt both in CT scan and FESS showing very good agreement (k=0.
CT scan of the nasal cavity and paranasal sinuses showed a blocked right ostiomeatal complex and a soft-tissue lesion expanding the right nasal cavity with posterior nasopharyngeal extension and a right concha bullosa.
Concha bullosa is noted in 14 patients with more common in unilateral (22%) and bilateral (6%).
The hypertrophy of the right middle turbinate in this case was not due to a concha bullosa, as evidenced by the middle turbinate's lack of pneumatization.
And also CT Scan is more useful in diagnosing concha bullosa, 19(32%) patients as compared to rhinoscopy 2(3%) patients and diagnostic nasal endoscopy 12(20%) patients.
A concha bullosa forms when the middle turbinate becomes pneumatized, which is a common anatomic variation.