Pneumomediastinum as a Manifestation of Granulomatosis with Polyangiitis

Table 1

Laboratory investigations.

	Pretreatment	3 months after treatment
White blood cells	10.9 × 10^9	8.67 × 10^9
Absolute neutrophil count	5.6 × 10^9	8.1 × 10^9
Absolute lymphocyte count	1.9 × 10^9/L	3.9 × 10^9/L
Absolute eosinophil count	0.2 × 10^9/L	0.108 × 10^9/L
Hemoglobin	8.68 g/dL	12.9 g/dL
Platelet	265 × 10^9	334 × 10^9
Creatinine	120 umol/L	114 umol/L
Urea	14 nmol/L	14 umol/L
C-reactive protein	6.5 mg/L	5.5 mg/L
Erythrocyte sedimentation rate	110 MM/HR	17 MM/HR
Urine analysis
Blood	+3	+1
Red blood cells	+2 (10–34 cells)	Negative
Protein	Negative	Negative
White blood cells	Negative	Negative
Casts	No casts seen	No casts seen
Antinuclear Ab	<1 : 40
P ANCA	<1 : 20	<1 : 20
C ANCA (indirect immunofluorescence assay)	1 : 20	<1 : 20
PR3	26.2 kU/L
MPO	1.4 kU/L
Anti-GBM Ab	0.9 U/mL