Adenocarcinoma, squamous cell carcinoma, and small cell carcinoma represent about 95% of lung tumours. However, the lung is the site of numerous types of tumours that may have an epithelial, mesenchymal, neuroendocrine, or lymphohematopoietic origin. With minor exceptions, both the clinical manifestations and the imaging characteristics are non-specific; many of the low-incidence tumours have common features with the high-incidence tumours. This article presents a group of low-incidence pulmonary tumours that pose multiple difficulties in terms of diagnosis due to non-specific symptomatology and non-specific imaging aspect. This article aims to correlate the histological data with imaging aspects to facilitate diagnostics. Because these tumours are rare and because they present in a variety of forms, problems may occur when establishing a diagnosis and trying to predict their behaviour. It is challenging to differentiate common lung tumours from rare ones based on clinical, radiological, or histological features. Only the presence of the imaging particularities, such as the location of the lesion, the association with certain patterns (appearance of ground glass, the “halo” sign, the presence of calcifications), and the histological/immunohisto-chemical profile can lead to the establishment of a correct diagnosis.
The partial or complete excision of the hemipelvis with the sparing of the lower limb is an option of the treatment of pelvic chondrosarcomas and a therapeutic alternative of the interilio-abdominal disarticulation. The operation has the same indications as the interilio-abdominal disarticulation and offers a good solution for avoiding a mutilating operation. A giant periacetabular pelvic chondrosarcoma developed in Ennequin zone II and partial zone III, was resected and reconstructed with iliofemoral cooptation after complex investigations -pelvic X-ray, CT, MRI, Bioptic confirmation. The wide excision of the tumor, a stable reconstruction, and an efficient recovery are essential for a successful treatment of pelvic chondrosarcomas.
Considering the wide range of both histological and imaging types found in a small group of tumours as an incidence, they can pose real problems in both diagnosis and therapeutic conduct, being difficult to differentiate clinically, imagistically, or histologically from lung tumours commonly found in the clinic (1). Adenocarcinoma, squamous cell carcinoma, and small cell carcinoma together account for approximately 95% of all lung tumours, but the lung is the site of many other types of tumours that may be of epithelial, mesenchymal, neuroendocrine, or lympho-haematopoietic origin, and these latter together account for approximately 5% of all pulmonary tumours (2,3). With a few exceptions, both the clinical manifestations and the imaging aspect are nonspecific, many of them having features in common with the other tumours with high incidence (3). The present study was performed on a group of 82 patients diagnosed with low-incidence lung tumours, aiming at presenting the main epidemiological, clinical, and paraclinical features as well as the difficulties in diagnosing this heterogeneous group of tumours (4,5). The ratio of patients who presented with benign tumours was close to that of the patients who presented with malignant tumours. Age, male sex, smoking, and occupational exposure were not included as risk factors for any tumour nature. Significantly more patients in urban areas have developed both benign and malignant tumours. Patients with malignant tumour pulmonary development presented to the hospital with symptoms in a significantly higher number, compared to those diagnosed with benign tumour. The location of benign tumours was mostly peripheral. Peripheral location of benign tumours required surgery to obtain the histopathological type, having a curative visa in some cases. About a third of those with malignant tumours had secondary lung tumours, or distant metastases.
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