Castleman disease variant of polyneuropathy, organomegaly, endocrinopathy, monoclonal protein and skin changes syndrome: A case report

Table 1 Sensory nerve conduction study

Sensory NCS
Nerve/sites	Rec. site	Latency, ms	Amplitude, µV	Segments	Distance, cm	Vel., m/s
Left median - digit II (antidromic)
Wrist	Index	5.311	2.71	Wrist - index	14	34.9
Right median - digit II (antidromic)
Wrist	Index	5.421	5.61	Wrist - index	15	35.1
Left ulnar - digit V (antidromic)
Wrist	Dig V	4.641	4.41	Wrist - dig V	12	33.9
Right ulnar - digit v (antidromic)
Wrist	Dig V	5.101	4.01	Wrist - dig V	12	31.6
Left radial - superficial (antidromic)
Forearm	Wrist	NR1	NR1	Forearm - wrist	10	NR
Right radial - superficial (antidromic)
Forearm	Wrist	NR1	NR1	Forearm - wrist	10	NR
Left sural - (antidromic)
Calf	Ankle	NR1	NR1	Calf - ankle	14	NR
Right sural - (antidromic)
Calf	Ankle	NR1	NR1	Calf - ankle	14	NR

¹Abnormal results; normal ranges are based on the local population and adjusted for the patient’s height (1.69 m).

NR: No response; NCS: Nerve conduction study; Dig: Digit.

Table 2 Motor nerve conduction study

Motor NCS
Nerve/sites	Muscle	Latency, ms	Amplitude, mV	Segments	Distance, cm	Velocity, m/s	Dur., ms
Left median – abductor pollicis brevis (APB)
Wrist	APB	5.731	4.01	Wrist - APB	8		8.81
Elbow	APB	16.06	1.8	Elbow - Wrist	24	23	10.52
Right median - abductor pollicis brevis (APB)
Wrist	APB	5.271	5.7	Wrist - APB	8		8.96
Elbow	APB	15.19	2.7	Elbow - Wrist	22	22	10.92
Left ulnar – abductor digiti minimi (ADM)
Wrist	ADM	4.481	4.51	Wrist - ADM	8		10.52
B. elbow	ADM	24.27	0.31	B. elbow - wrist	22	11	18.00
A. elbow	ADM	32.88	0.51	A. elbow - B. elbow	14	16	15.50
Right ulnar – abductor digiti minimi (ADM)
Wrist	ADM	4.501	3.91	Wrist - ADM	8		13.04
B. elbow	ADM	35.27	0.41	B. elbow - wrist	20	6	21.23
A. elbow	ADM	46.10	0.21	A. elbow - B. elbow	14	13	20.42
Left peroneal - extensor digitorum brevis (EDB)
Ankle	EDB	NR1	NR1	Ankle - EDB	8		NR
Right peroneal - extensor digitorum brevis (EDB)
B. fib head	EDB	NR1	NR1	B. fib head - ankle			NR
Left tibial – abductor hallucis (AH)
Ankle	AH	8.311	1.81	Ankle - AH	8		7.15
Knee	AH	26.15	0.91	Knee - ankle	40	22	8.46
Right tibial – abductor hallucis (AH)
Ankle	AH	7.401	1.51	Ankle - AH	8		6.65
Knee	AH	26.29	0.31	Knee - ankle	37	20	8.56
Left peroneal - tibialis anterior (TA)
Fib head	Tib Ant	4.33	2.41	Fib head - tib ant			14.77
Pop fossa	Tib Ant	6.58	2.2	Pop fossa - fib head	10	44
Right peroneal - tibialis anterior (TA)
Fib head	Tib Ant	6.191	2.31	Fib head - tib ant
Pop fossa	Tib ant	8.38	2.0	Pop fossa - fib head	6	27	14.71
Left radial – extensor indicis propius (EIP)
Forearm	EIP	NR1	NR1	Forearm - EIP			NR
Elbow	EIP	NR1	NR1	Elbow - forearm	14	NR	NR
Spiral Gr	EIP	NR1	NR1	Spiral Gr - elbow	13	NR	NR
Right radial – extensor indicis propius (EIP)
Forearm	EIP	3.041	3.5	Forearm - EIP			9.44
Elbow	EIP	6.00	2.2	Elbow - forearm	10	34	9.06
Spiral Gr	EIP	8.69	2.7	Spiral Gr - elbow	10	37	9.52

¹Abnormal results; normal ranges are based on the local population and adjusted for the patient’s height (1.69 m).

NR: No response; NCS: Nerve conduction study; APB: Abductor pollicis brevis; ADM: Abductor digiti minimi; B: Below; A: Above; EDB: Extensor digitorum brevis; AH: Abductor hallucis; TA: Tibialis anterior; Fib: Fibular; Pop: Popliteal; EIP: Extensor indicis propius; Gr: Groove.