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Vol. 6. Issue 4.
Pages 323-330 (July - August 2000)
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Vol. 6. Issue 4.
Pages 323-330 (July - August 2000)
CASO CLÍNICO/CLINICAL CASE
Open Access
Mioblastoma do pulmão
Lung myoblastoma
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J. Vizcaino*, R. Sotio-Mayor*, E. Teixeira*, J. Maçanita*, M.J. Palhano**, A. Bugalho de Almeida*
* Serviço de Pneumologia do Hospital de Santa Maria. Lisboa (Director. Prof. Doutor A. Bugalho de Almeida)
** Serviço de Anatomia Patológica do Hospital de Santa Maria. Lisboa. (Directora: Profa Doutora Ma. José Forjaz de Lacerda)
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RESUMO

O Mioblastoma de pulmão é um tumor raro, com origem nas células de Schwann, cujo modo de apresentação mais comum é a tosse e a toracalgia. Pode ser um achado radiológico ou endoscópico.

O caso que apresentamos referese a um doente de sexo masculino, 55 anos de idade, carpinteiro, exfumador (52 UMA), com história de bronquite crónica (BC), que referia toracalgia esquerda desde há alguns meses, ouvindo-se na auscultação pulmonar um sibilo fixo na base do hemitórax esquerdo. A telerradiografia do tórax revelou apenas “paquipleurite residual na base do hemitórax direito”. A TAC torácica (com cortes nnos) mostrou “discreta imagem nodular no apical do lobo inferior esquerdo (B6) e paquipleurite residual na base do hemitórax direito”. A broncofibroscopla revelou “sinais de BC e no segmento mais posterior do apical do lobo inferior esquerdo o esporão está um pouco esbranquiçado mas sem outras lesões”. Realizou biópsias a este nível que mostraram “tumor de celulas granulares-Mioblastoma”, pelo que foi submetido a lobectomia inferior esquerda cujo exame anatomopatológico da peça ressecada confirmou o diagnóstico. Desde então, o doente é seguido na nossa consulta mantendo a sua BC controlada e sem qualquer evidência de recidiva tumoral.

A propósito fazem-se algumas considerações sobre este tipo de neoplasia do pulmão, cuja histogénese é desconhecida.

REV PORT PNEUMOL 2000; VI (4): 323-330

Palavras chave:
tumor de células granulares
mioblastoma
mioblastoma de células granulares
neoplasia do pulmão
ABSTRACT

Granular Cell Myoblastoma is a very rare lung tumor arising from Schwann cells. Cough and chest pain are the most frequent presenting symptoms. It can be also a X-ray or endoscopic finding.

The present case is about a 55 years old carpenter, ex-smoker (52 pack-years), with chronic bronchitis. A left side chest pain lasting for several months was his main complain. A fixed wheeze could be beard on phisical observation in the base of the left hemithorax. The chest radiograph shows “residual paquipleuritis on the base of the right lower lobe”. The chest CT Scan shows “small nodule on the B6 (apical) left Inferior lobe and residual paquipleuritis on the base of the right lower lobe”. On bronchoscopy there were “signs of Chronic Bronchitis and the bifurcation of the posterior segment of the left inferior lobar bronchi bad a whitish appearence”. Several biopsies of that bifurcation showed a Granular Cell Myoblastoma Tumor. He was submited to a left inferior lobectomy. The histology confirmed the diagnosis. Ever since the patient is followed in our out door department. After 3 years of follow-up there is no evidence or tumor recurrency. Tha case ends up with theoretical considerations about this rare neoplasm wich histogenesis is not known.

REV PORT PNEUMOL 2000; VI (4): 323-330

Key-words:
Granular cell tumor
myoblastoma
granular cell myoblastoma
lung neoplasm
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Copyright © 2000. Sociedade Portuguesa de Pneumologia/SPP
Pulmonology
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