Background: The aim of the study was to evaluate radiographic features of systemic sclerosis-associated interstitial lung disease. Patients and methods: 116 patients with systemic sclerosis-associated interstitial lung disease (SSc-ILD) from 2010 to 2019 comprised our retrospective study. All patients were subject to high resolution computed tomography (HRCT). ILD patterns were classified into 7 patterns as IIPs and analyzed with pathology. We chose two staging method and two semi-quantitative score methods to evaluate the HRCT performance and analyzed with pulmonary function tests. Results: Ground-glass opacities were the most common presentation on HRCT, followed by interlobular septal thickening, reticular opacities, intralobular interstitial thickening; honeycombing, traction bronchiectasis and nodules can also be observed. The most common pattern of SSc-ILD was nonspecific interstitial pneumonia (NSIP), secondly was UIP. There was no difference in ILD pattern between HRCT and pathology, and revealed a high congruence. The four HRCT evaluating methods presented in this study all had significant relationships with PETs. Conclusion: The most common pattern of SSc-ILD was nonspecific interstitial pneumonia (NSIP). The ILD patterns of HRCT coincide very well with histology, and will replace pathology as the gold standard for diagnosis and evaluation of SSc-ILD.

Background: Pulmonary fibrosis is a clinical problem with an enigmatic etiology with no effective therapy. Current therapies for lung fibrosis are ineffective for progression of lung fibrosis and preventing respiratory failure. Objectives: The aim of this study is to explore the expression of Desmin, α-smooth muscle actin (α-SMA) and the telomerase subunit: human telomerase reverse transcriptase (h-TERT) in a spectrum of lung tissue samples consist of lung fibrosis, lung cancer, and healthy controls. Materials and Methods: The expression of Desmin, α-SMA and hTERT were studied in samples of 15 pulmonary fibrosis samples, 16 samples of lung cancer and 14 healthy controls investigated. We evaluated Desmin, α-SMA as well as the expression of components of telomerase (TERT), by methods: RNA Extraction and cDNA synthesis, Real-Time quantitative PCR, Immunohistochemistry, all prepared from lung tissue paraffin blocked. Results: α-SMA marker detected 1(8.3%) of healthy control and 11(91.7%) of lung fibrosis samples. The difference between groups was significant (p<0.001). Also the difference between healthy control 1(6.7%) and lung cancer 14 (93.3%) for α-SMA marker was a significant (P<0.001). It was a significant difference between healthy control and lung cancer for TERT expression (P=.005). TERT was not positive in any sample of neither healthy control nor lung fibrosis. For TERT, it was a significant difference between lung fibrosis and lung cancer by Fisher’s Exact Test (P=.004). Expression of TERT and α-SMA between small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC) was not statistically significant (P=.700, P=0758), respectively. Conclusions: We recommend more investigation to regard α-SMA, Desmin in patients with lung fibrosis and follow them for possible cancer risk. Also, more study is needed to regard TERT as a marker in lung cancer. Assessment of these markers may have future implication to explain the same way of pathogenesis and carcinogenesis of fibrosis and cancer and for prevention or treatment

Organizing pneumonia (OP), can be seen in association with lung injury, infection, drug intoxication, and connective tissue diseases. Patients of rheumatoid arthritis (RA) are prone to develop interstitial lung disease (ILD), but the pulmonary involvement usually occurs several years after the joint manifestations. Only in about 10% cases of RA, the initial manifestation of the disease can be in the form of interstitial lung disease. OP as the initial manifestation of RA is extremely uncommon occurrence. Here is presented a case of 52-year-old male who presented with OP as the initial manifestation of RA. On investigation, the RA factor and anti-CCP Antibodies were positive. Based on clinical, radiological and histopathological findings the diagnosis was established.