Table 1.

Clinical and imaging features.

Patient #	Age (years)	Sex	Clinical symptoms	Lymphocyte count (× 109/L)	CRP (mg/L)	Indication for referral to CT	CT protocol	CT features	Lung extent on CT	Origin and number of days of hospitalization	Medical history
1	49	M	Fever	0.82	29	Suspicion of cholangitis	Contrast-enhanced CT of the thorax, abdomen and pelvis	Diffuse bilateral GGO with consolidations and right pleural effusion	Severe (> 50%)	Inpatient 5 days	Metastatic cholangiocarcinoma
2	85	M	Fatigue	0.6	91	Suspicion of neoplasia	Contrast-enhanced CT the thorax, abdomen and pelvis	Bilateral GGO with few areas of consolidation in both lower lobes	Mild (< 10%)	Outpatient	Repeated falls and weight loss
3	86	F	Asymptomatic	0.8	40	Preoperative assessment of a lung nodule	Unenhanced chest CT	Patchy peripheral GGO with crazy paving in both lower lobes	Moderate (10 to 25%)	Outpatient	Chronic obstructive pulmonary disease Spiculated lung nodule
4	58	M	Asymptomatic	1.3	35	Routine oncologic follow-up	Contrast enhanced CT of the thorax, abdomen and pelvis, followed by an additional thoracic CT	Discrete areas of GGO in both lower lobes with unique image of atoll sign	Mild (< 10%)	Outpatient	Renal cell carcinoma surgically treated two years ago
5	30	F	Fever	1.2	46	Puerperal endometritis	Contrast-enhanced CT of the abdomen and pelvis, followed by an additional thoracic CT	Bilateral focal GGO and consolidations with linear consolidations in the left lower lobe	Mild (< 10%)	Inpatient 4 days	Vaginal delivery 3 days ago
6	55	M	Fever	1	32	Suspicion of postoperative abscess	Contrast-enhanced CT of the abdomen and pelvis followed by an additional thoracic CT	Subpleural GGO in the left lower lobe	Mild (< 10%)	Inpatient 60 days	Radical prostatectomy for prostate cancer 2 month ago

Note. CT: computed tomography; GGO i: ground glass opacities; CRP: C-reactive protein; M: male; F: female.