Priapism

Ans. is ‘b’ i.e., Leukaemia 

Ans. Cantharide poisoning

Ans.A. Sickle cell anaemia

• He presents with Priapism.
• Priapism is defined as A prolonged erection of the penis, usually without sexual arousal, lasting for > 4 hours.
• In people with sickle cell disease, the sickling of red blood cells can cause an erection. Blood is unable to flow out of the penis because the vessels are blocked by sickled blood cells. Priapism can be very painful and is a serious condition.

Low-flow priapism may be due to any of the following:

• An excessive release of neurotransmitters.
• Blockage of draining venules (eg, mechanical interference in sickle cell crisis, leukaemia, or excessive use of intravenous parenteral lipids).
• Paralysis of the intrinsic detumescence mechanism.
• Prolonged relaxation of the intracavernous smooth muscles (most often caused by the use of exogenous smooth-muscle relaxants such as injectable intra-cavernosal prostaglandin E I).
• Prolonged low-flow priapism leads to a painful ischemic state, which can cause fibrosis of the corporeal smooth muscle and cavernosal artery thrombosis. 
• The degree of ischemia is a function of the number of emissary veins involved and the duration of occlusion.