middle lobe syndrome

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Related to Brock syndrome: Right Middle Lobe Syndrome

middle lobe syndrome

 
lobar atelectasis in the right middle lobe of the lung, with chronic pneumonitis; called also Brock syndrome.

mid·dle lobe syn·drome

atelectasis with chronic pneumonitis of the middle lobe of the (right) lung, due to compression of the middle lobe bronchus, usually by enlarged lymph nodes, which may be tuberculous; chief symptoms are chronic cough, wheezing, recurrent respiratory infections, hemoptysis, chest pain, malaise, easy fatigability, and loss of weight; sometimes confused with interlobar accumulation of fluid in the lateral x-ray view.
Synonym(s): Brock syndrome

middle lobe syndrome

localized atelectasis of the middle lobe of the right lung, characterized by chronic infection, cough, dyspnea, wheezing, and obstructive pneumonitis. Asymptomatic obstruction of the bronchus may occur. The condition arises when the cuff of lymphatic glands that surrounds the middle lobe bronchus becomes enlarged as a result of nonspecific or tuberculous inflammation during childhood. The bronchus is thus compressed, and bronchiectasis develops in the obstructed part of the lung. Treatment includes antituberculosis chemotherapy, administration of corticosteroids, and surgical excision. See also atelectasis, bronchiectasis.

middle lobe syndrome

A condition characterised by chronic atelectasis and collapse of the middle lobe and/or lingula of the right lung due to extrinsic compression of the right middle bronchus.

Aetiology
Thymoma, hilar lymphadenopathy (e.g., TB, sarcoidosis or lymphoma), tumours or obstruction (due to intraluminal tumours or foreign bodies). Compression results in chronic pneumonitis, bronchial obstruction, bronchiectasis and decreased lung capacity. Primary disease findings include calcified hilar lymph nodes, granulomas and erosion into the bronchopulmonary apparatus.

middle lobe syndrome

Chronic atelectasis and collapse of the middle lobe and/or lingula of the right lung due to extrinsic compression of the right middle bronchus by thymoma, hilar lymphadenopathy–eg, TB, sarcoidosis, or lymphoma, tumors or obstruction–due to intraluminal tumors or foreign bodies; compression results in chronic pneumonitis, bronchial obstruction, bronchiectasis and ↓ lung capacity; primary disease findings include calcified hilar lymph nodes, granulomas and erosion into the bronchopulmonary apparatus

Brock,

Sir Russell C., English surgeon, 1903-1980.
Brock operation - transventricular valvotomy for relief of pulmonic valvar stenosis; obsolete procedure.
Brock syndrome - atelectasis with chronic pneumonitis of the middle lobe of the right lung, due to compression of the middle lobe bronchus, usually by enlarged lymph nodes, which may be tuberculous. Synonym(s): middle lobe syndrome