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Atypical Pneumonia

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Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease include...

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Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
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Pneumonia I: Introduction

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Updated: Jun 5, 2026

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia

Published on: December 19, 2020

Wegener granulomatosis masquerading as pneumonia.

D J Theodorou¹, S J Theodorou, K Mpougias

¹Department of Radiology, Ioannina General Hospital, Ioannina, Greece. daphne_theodorou@hotmail.com

JBR-BTR : Organe De La Societe Royale Belge De Radiologie (SRBR) = Orgaan Van De Koninklijke Belgische Vereniging Voor Radiologie (KBVR)

|December 25, 2010

Summary

Wegener granulomatosis can present atypically, mimicking organizing pneumonia in elderly patients. This case highlights the diverse clinical and imaging manifestations of this condition.

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Last Updated: Jun 5, 2026

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia

Lung CT Segmentation to Identify Consolidations and Ground Glass Areas for Quantitative Assesment of SARS-CoV Pneumonia

Published on: December 19, 2020

Area of Science:

Rheumatology
Pulmonology
Pathology

Background:

Wegener granulomatosis (WG), now known as Granulomatosis with Polyangiitis (GPA), is a rare autoimmune vasculitis affecting small to medium-sized vessels.
Typical presentations involve the respiratory tract and kidneys, but extrathoracic manifestations are also recognized.

Observation:

An elderly patient presented with clinical and imaging findings suggestive of organizing pneumonia.
Diagnostic workup revealed a limited form of Wegener granulomatosis as the underlying cause.

Findings:

The case demonstrated an unusual presentation of WG, closely resembling organizing pneumonia.
This atypicality underscores the importance of considering WG in the differential diagnosis of pulmonary infiltrates.

Implications:

This case broadens the understanding of WG's varied clinical spectrum.
Recognizing these atypical presentations is crucial for timely diagnosis and appropriate management of Wegener granulomatosis.