Pulmonary epidermoid carcinoma in a patient with acromegaly: a rare entity
Siham El Aziz, Asma Chadli, Atika Obbiba, Hassan El Ghomari, Ahmed Farouqi
The Pan African Medical Journal. 2012;12:27. doi:10.11604/pamj.2012.12.27.1559

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Case report

Pulmonary epidermoid carcinoma in a patient with acromegaly: a rare entity

Cite this: The Pan African Medical Journal. 2012;12:27. doi:10.11604/pamj.2012.12.27.1559

Received: 09/02/2012 - Accepted: 04/05/2012 - Published: 10/06/2012

Key words: Acromegaly, carcinoma, pulmonary neoplasia, pituitary adenoma, epidermoid carcinoma

© Siham El Aziz et al. The Pan African Medical Journal - ISSN 1937-8688. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Available online at: http://www.panafrican-med-journal.com/content/article/12/27/full

Corresponding author: Dr El Aziz Siham, DR S. EL Aziz, Ibn Rochd Hospital, service d’Endocrinologie (p26), Quartier des hopitaux, Casablanca, Maroc (sihamelaziz@yahoo.fr)


Pulmonary epidermoid carcinoma in a patient with acromegaly: a rare entity

 

Siham El Aziz1,&, Asma Chadli1, Atika Obbiba1, Hassan El Ghomari1, Ahmed Farouqi1

 

1Department of endocrinology, diabetes and metabolism, Ibn Rochd Universitary hospital, Casablanca, Morocco

 

 

&Corresponding author
Dr El Aziz Siham, DR S. EL Aziz, Ibn Rochd Hospital, service d’Endocrinologie (p26), Quartier des hopitaux, Casablanca, Maroc

 

 

Introduction

Acromegaly is a chronic disease caused usually by a pituitary adenoma secreting excess growth hormone (GH). Untreated acromegaly is associated with a high morbidity and two -fold mortality risk [1,2]. Acromegalic patients have most frequently respiratory and vascular diseases [3]. More recently, many studies have shown an increase risk of neoplasias [4,5] in acromegalic patients [6,7], correlated to increase level of Insulin-like Growth Factor (IGF) and elevated proliferative activity [8-10]. The most common tumors are colorectal neoplasias, breast and thyroid cancer [11-13]. Screening of tumors must be done before and after tranpshenoidal surgery, and long term follow up is needed in partially treated acromegalic patients. Pulmonary carcinomas are much rare than other carcinoma in non-smoking acromegalic patients. We report a case of epidermoid carcinoma in an acromegalic woman and discuss this rare association.

 

 

Patient and observation

We report the case of a 56-years-old non-smoking female patient diagnosed with acromegaly seven years ago and treated by transphenoidal surgery and radiotherapy. She was referred to our unit for persistent acromegaly. She had evident signs of acromegaly on clinical examination. Laboratory investigation demonstrated increase IGF1 at 429 ng/ml and pituitary 13 mm macro-adenoma. She didn’t have metabolic complications. Our decision was surgery, because of non availability of medical treatment. She was referred to the neurosurgeon and proposed a trans-sphenoidal adenoma removal. A routine chest-X-ray, done in the pre-operative workout, revealed a right sided paracardiac opacity (Figure 1). A thorax computed tomography scan (CT) showed a large tumor of the right medium lobe, in contact with the big lung sulcus and an enlargement of the right inferior lobe (Figure 2 and Figure 3). Abdominal CT was undertaken before surgery to exclude other localisations. Biopsy through thoracotomy revealed a malignant tumor. Resection of the right inferior pulmonary lobe with mediastinal lymph nodes excision were realized. Histological examination demonstrated a 5 cm epidermoid carcinoma poorly differentiated with extension to pleura and with metastatic lymphonodes. Pituitary surgery was cancelled; the patient was referred to an oncological center for chemotherapy protocol.

 

 

Discussion

Acromegaly is a rare disease with a prevalence of 40 cases/1 million population and 3 new cases/1 million population per year due to excess growth hormone (GH) secreted usually by a pituitary adenoma [14,15]. Majority of clinical and metabolic complications of acromegaly are caused by increase levels of GH witch induce high insulin like growth factor 1 (IGF1) [16]. Beside morbidity of acromegaly, mortality seems to be increased in this disease. Several studies concerning long term follow-up of acromegalic patients demonstrated a link between acromegaly and cancer since IGF1 increase proliferative activity of cells [17,18]. Most common tumors are colorectal [19], thyroid carcinoma [20], breast and prostate tumors. It is recommended for acromegalic patients to undergo screening colonoscopy and thyroid ultrasonography [11]. Great attention had been provided to colorectal cancer since a high level of IGF1 has been correlated to increase risk of colorectal cancer [9,21-23]. The American Cancer Society defined acromegalic patients just above the average risk of colorectal cancer [24] and recommend that colonoscopsy should be prescribed after the age of 50 [25].

 

Lung cancer is the most frequent cancer inducing deaths in women and men according to the American Cancer Society [24]. Lung cancer in acromegalic patients seems to be rare; and it’s seems like there is not an increase prevalence of non-small cell cancer in acromegalic patients compared to normal population according to several studies [5,17,26] even if high level of IGF1 value increase proliferation of lung cells [27,28]. Table 1 show the prevalence of most frequent cancer in acromegalic patients according to different studies. As we can see, neoplasias are frequent in acromegalic patients with a prevalence of about 10% according to these large scale epidemiological studies (Table 1). Lung carcinoma seems extremely rare in patients with acromegaly. Our female patient was a non-smoking patient, she didn’t complain of chest pain, cough, trouble breathing or weight. The major risk factor for this patient seems to be the chronic exposure to high level of IGF1 resulting from partially treated acromegaly. Epidermoid carcinoma is a non-small lung cancer with small chance of recovery and poor prognosis when the cancer is in an advanced stage or in poorly-differentiated tumors, like in our patient. Since lung cancer may not be associated with any symptoms, a routine chest X-ray should be done for screening in acromegalic patient, including in treated patient with persistent high level of IGF1 [28].

 

 

Conclusion

Active disease may precede for several years the diagnosis of acromegaly because of indolence. Highl levels of IGF1 contribute to progression of malignant tumors. In acromegalic patients, screening is fundamental, and chest X-ray with CT may be necessary. During follow-up, more attention should be given in partially treated acromegalic patients because of persistent increase of IGF1 levels. Screening of neoplasias should be done in these high risk patients.

 

 

Competing interests

The authors declare no competing interests.

 

 

Tables and figures

Table 1: Cancer prevalence in acromegaly according to several studies

Figure 1: Right sided paracardiac opacity at chest X-ray without pleural effusion

Figure 2: Right medium lobe large tumor at the thorax tomography scan, with speculated margin, in contact with the big lung sulcus and elargment of right inferior lobe

Figure 3: CT scan right ovalar 45x35 mm necrosed tumor with irregular margin, with no mediastinal lymph nodes, and no left parenchymatous anomaly and no pleural reaction

 

 

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