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Lung Segment Anatomy Annotated on Chest CT
Right Lung:
 • Upper Lobe: Apical, Posterior, Anterior
 • Middle
Lung Segment Anatomy ... Annotated on Chest ... lobes #Segments #Chest ... #CT #CTChest #pulmonary ... #clinical #radiology
Dacrocytes (tear drop cells) 
Other poikilocytes resemble a pear or teardrop. The narrow, tapered end
may be
tapered end may be long ... metaplasia, pernicious anemia ... thalassemia, and some hemolytic ... anemias.
Elevated Lactate Dehydrogenase (LDH) - Differential Diagnosis Framework

LDH is a cytoplasmic enzyme present in tissues throughout
Anemias: - Spherocytosis ... anemia, PNH, immune ... - Pernicious anemia ... Prosthetic valves Lung ... Pneumonia • Other lung
Reticulocyte Production Index = (Retic %) x (Hct / 45) / Maturation Factor
The maturation factor is
approximately how long ... Index < 2: • Anemia ... Retroperitoneal, Uterine • Hemolysis ... Microangiopathic hemolytic ... anemia, Intrinsic
Feeding Vessel Sign on Chest CT
 • Distinct pulmonary vessel leading into a lung nodule or
Vessel Sign on Chest ... leading into a lung ... doi.org/10.1016/j.chest ... Vessel #Sign #CT #Lung ... Pulmonary #diagnosis #radiology
Pulmonary Function Tests (PFTs) - Interpretation Algorithm
 • Normal
 • Pulmonary Hypertension, Anemia, Carboxyhemoglobinemia
 • Chest
Hypertension, Anemia ... Carboxyhemoglobinemia • Chest ... • Interstitial Lung
Pulmonary Hypertension Groups - WHO Classification
Group I - Vascular remodeling of pulmonary arteries
 • Idiopathic, HIV,
III - Chronic lung ... Sarcoidosis, chronic hemolytic ... anemia, thyroid ... disorders, sickle cell anemia ... dyspnea, fatigue, chest
Halo Sign on Chest CT
 • SPN or mass surrounded by a circumferential GGO
 • DDx:
Halo Sign on Chest ... sarcoidosis, mets to the lung ... doi.org/10.1016/j.chest ... Halo #Sign #CT #Lung ... Pulmonary #diagnosis #radiology
COVID-19 Patterns of Lung Findings on Chest CT
1. Reverse Halo Sign
2. ARDS
3. Crazy-Paving Pattern
4. Bilateral Peripheral
19 Patterns of Lung ... Findings on Chest ... COVID19 #Patterns #Lung ... Pulmonary #ChestCT #radiology ... #CTChest #diagnosis
Clinical Features of Systemic Lupus (SLE)
General: Fever (50%), Depression, Fatigue (75%), Weight loss (50%)
Eye: Sjögrens (15%)
Skin
Purpura, Urticaria Chest ... effusion, Restrictive lung ... ) Blood (75%): Anemia ... normochromic nomocytic or haemolytic