Is it just a simple pneumonia?

Postobstructive pneumonia is a pulmonary infiltrate distal to a bronchial obstruction. It presents a diagnostic challenge, and full attention should be on recognition of this entity, identify, and treating the obstructive lesion and secondary infection. In adults, malignancy is the main cause; however, others etiologies must be investigated.

An unusual case of osteoarthritis?

Forestier disease is a condition characterized by calcification and ossification of ligaments and entheses particularly affecting axial skeleton. Diagnosis is difficult and mandates a high suspicion level, but unexpensive and accessible examinations like a simple radiography might provide useful diagnostic clues in these challenging clinical scenarios and improve clinical assistance.

Is it just an obstructive pyelonephritis?

Pyelocaliceal obstruction is a diagnostic challenge, and it is important to identify the obstruction cause. Some patients present extra-renal compressive masses that need further imagiologic investigation and a biopsy, to establish the diagnosis.