<unk>  is a rare disease characterized by enlargement of the lymph vessels supplying the lamina propria of the small intestine. Although its prevalence is unknown, it being classified as a "rare disease" means that less than 200,000 of the population of the United States are affected by this condition and its subtypes.
Waldmann disease
Norrie disease
Karak syndrome
Batten disease
Kallmann syndrome
Zaki syndrome
Camisa disease
Mowat–Wilson syndrome