Winter bottom's sign in sleeping sickness refers to-
Sleeping sickness 

Fever
Loss of nocturnal sleep
Headache
Feeling of oppression
Pruritis and maculopapular rashes
Weight loss
Arthralgia
Hepatosplenomegaly
Lymphadenopathy, particularly of the posterior triangle of the neck → Winter bottom's sign
Unilateral conjunctivitis
Posterior cervical lymphadenopathy
Narcolepsy
Transient erythema