Pleural effusion, ascites, colon ulcers and hematochezia: What we can learn from the diagnostic process of a patient with plasma cell myeloma: A case report

Table 1 Blood, pleural effusion, and stool tests

Blood test		Pleural effusion test		Stool test
WBC	8.74 × 109/L	Color	Yellow	White blood cells	Small amount
Hb	101 g/L↓	Transparent	Turbid	Red blood cells	Small amount
K+	3.09 mmol/L↓	Rivalta test	Positive	Pus cells	None
Na+	127 mmol/L↓	Red blood cell count	2017 × 106/L	Macrophages	None
Ca2+	1.87 mmol/L↓	White blood cell count	3000 × 106/L	Occult blood	Positive
CRP	124.1 mg/L↑	Granulocytes	85%	Clostridioides difficile toxin A/B	Negative
PCT	0.213 ng/mL↑	Lymphocytes	10%	Clostridioides difficile glutamate dehydrogenase antigen	Positive
Albumin	25.1 g/L↓	Mesothelial cells	5%	Fecal calprotectin	600 μg/g↑
Creatinine	32 μmol/L↓	Protein	21 g/L
BNP	801.05 pg/mL↑	Cholesterol	0.66 mmol/L
T-SPOT	0	CEA	1.03 ng/mL
CEA	4.40 ng/mL

↑ or ↓: Higher or less than normal reference value. BNP: Brain natriuretic peptide; Ca₂⁺: Calcium ions; CEA: Carcinoembryonic antigen; CRP: C reactive protein; Hb: hemoglobin; K⁺: Kalium ions; Na⁺: Sodium ions; PCT: Procalcitonin; T-SPOT: T cell spot test; WBC: White blood cells.