Associations between occupational and environmental exposures and organ involvement in sarcoidosis: a retrospective case-case analysis

Background

Sarcoidosis most commonly affects lungs and intrathoracic lymph nodes, but any other organ can be involved. In epidemiological studies, many occupational and environmental exposures have been linked to sarcoidosis but their relationship with the disease phenotype has barely been studied.

Objective

To investigate how occupational and environmental exposures prior to diagnosis relate to organ involvement in patients with sarcoidosis

Methods

We retrospectively studied patients seen at a sarcoidosis clinic between 2017 and 2020. Patients were included if they had a clinical presentation consistent with sarcoidosis and histologically confirmed epithelioid granulomas or had Löfgren syndrome. In a case–case analysis using multivariable logistic regression we calculated odds ratios (OR) of prespecified exposure categories (based on expert ascertainment) for cases with a given organ involvement versus cases without this organ involvement.

Results

We included 238 sarcoidosis patients. Sarcoidosis limited to pulmonary involvement was associated with exposure to inorganic dust prior to diagnosis (OR 2.11; 95% confidence interval [CI] 1.11–4.17). Patients with liver involvement had higher odds of contact with livestock (OR 3.68; 95% CI 0.91–12.7) or having jobs with close human contact (OR 4.33; 95% CI 1.57–11.3) than patients without liver involvement. Similar associations were found for splenic involvement (livestock: OR 4.94, 95% CI 1.46–16.1; close human contact: OR 3.78; 95% CI 1.47–9.46). Cardiac sarcoidosis was associated with exposure to reactive chemicals (OR 5.08; 95% CI 1.28–19.2) or livestock (OR 9.86; 95% CI 1.95–49.0). Active smokers had more ocular sarcoidosis (OR 3.26; 95% CI 1.33–7.79).

Conclusions

Our study indicates that, in sarcoidosis patients, different exposures might be related to different organ involvements—hereby providing support for the hypothesis that sarcoidosis has more than one cause, each of which may promote a different disease phenotype.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12931-021-01818-5.

Clinical features of sarcoidosis patients presenting with head and neck manifestations - a two-center retrospective study and proposal of a diagnostic algorithm for the otorhinolaryngologist

Background and Aims: We aimed to investigate the clinical characteristics of patients presenting with sarcoidosis of the head and neck as the initial manifestation and to provide recommendations for the diagnostic work-up for the practicing otorhinolaryngologist.Material and Methods: We performed a retrospective cohort study at two university medical centers in Germany. Patients with a histopathologically confirmed diagnosis of sarcoidosis treated in the otorhinolaryngology departments were analyzed.Results: We identified 62 patients (2003-2016). In total, 85.4% (n = 53) of patients received the initial diagnosis of sarcoidosis during their ENT treatment. Sarcoidosis was detected in the lymph nodes in 42.3% (n = 30) of the patients; 57.7% had extra-lymphatic manifestations. Fifteen patients (24.2%) showed pulmonary involvement. 30.6% (n = 19) were treated with oral glucocorticoids (GC) alone, three patients with GC and methotrexate, one patient initially received a combination of GC and azathioprine, one patient rejected the recommended treatment.Conclusions: Sarcoidosis should be considered as a differential diagnosis in patients presenting with head and neck symptoms. The most frequent presenting symptoms were cervical lymphadenopathy and affection of the paranasal sinuses. Therefore, otorhinolaryngologists should be aware of sarcoidosis and help guide referral strategies as they may be the first physicians treating these patients.

Sarcoidosis of the paranasal sinuses

BACKGROUND

Sarcoidosis is a chronic disease, which predominantly affects the lung. Since sinonasal sarcoidosis is rare, little is known about the sarcoidosis manifestation at this site. Therefore, the aim of our study was to detect the prevalence of sinonasal sarcoidosis, its clinical occurrence, diagnosis, and therapy.

METHODS

The database of all patients having visited the otorhinolaryngology departments of the universities in Göttingen and in Bonn between 2003 and 2016 was searched for the diagnosis of sinonasal sarcoidosis.

RESULTS

Thirteen patients with a biopsy-proven sinonasal sarcoidosis were identified. Most patients presented non-specific clinical symptoms, which are also found in acute and chronic sinusitis. None of the patients was suspected to have sinonasal sarcoidosis by the ENT doctor before histological validation. The mean diagnostic delay was 262 (± 195) days. An additional pulmonary involvement was detected in four of six patients.

CONCLUSIONS

Sinonasal sarcoidosis is presenting with heterogeneous clinical presentations. An early biopsy of granulomatous lesions is mandatory. A multidisciplinary approach is needed to exclude serious lung or heart manifestations, because even asymptomatic organ involvement is possible. A CT-scan may be useful even if unspecific. Local or systemic therapy has to be prepared individually using local and systemic corticosteroids, antimetabolites, or anti-TNF-alpha.

A rare presentation of histologically proven sarcoidosis of the knee: A case report and brief review of the literature

We here report a patient with histologically proven sarcoidosis of the knee, a rare localization of sarcoidosis, which usually presents itself as a pulmonary disease. Case reports of radiological images that suggest osseous sarcoidosis of the appendicular skeleton are not so rare, however few are histologically proven. Since in our patient MRI could not distinguish between sarcoidosis and another (possibly malignant) disease, histological proof was obtained through a CT-guided biopsy. Imaging and treatment guidelines for extrapulmonary sarcoidosis are inexistent, due to lack of randomized trials.

Hepatic sarcoidosis presenting as portal hypertension and liver cirrhosis: case report and review of the literature

Systemic sarcoidosis is a disease of unknown etiology, with the liver being the third most commonly affected organ. Most cases of hepatic sarcoidosis are not clinically apparent, but a few can progress to liver cirrhosis, portal hypertension and ultimately liver failure. The diagnosis of hepatic sarcoidosis is difficult, considering that no single laboratory test or radiographic finding can definitively diagnose this systemic disease. Diagnosis of hepatic sarcoidosis relies heavily on histopathologic evaluation of two or more organs, a diagnostic modality that is invasive and may not be applicable to all patients. The treatment of hepatic sarcoidosis is challenging, with no large randomized controlled trials done to date. Physicians must be aware of the complications of hepatic sarcoidosis, and must include the same in the differential diagnosis of liver cirrhosis. We present a case of hepatic sarcoidosis complicated by portal hypertension and liver cirrhosis.