Hemoglobin Variant (Hemoglobin Aalborg) Mimicking Interstitial Pulmonary Disease

Figure 1

Explanations for reduction in DLCO: (a) normal physiology, (b) anemia, (c) high carboxyhemoglobin levels, (d) pulmonary disease (thickening of the alveolar membrane), (e) pulmonary vascular disease, and (f) Hb Aalborg.

(a)

(b)

(c)

(d)

(e)

(f)