Why not?

There is a very famous case of a thalassaemia major patient, Sukhsohit Singh, who passed 2011 IAS exam in India, which is equally or perhaps more difficult (if we just consider population factor) than CSS.

Initially, he was declared medically unfit but he filed an appeal and fought the case which he won and set a precedent for such patients.

The stance he took was that thalassemia:

• is more of a routine treatment than an ailment for the patient as they're raised in life adopted to its treatment i.e. simple blood transfusion

• doesn’t require urgent medical care as such blood transfusions are not of urgent nature

• is not contagious

• and finally it doesn't interfere with mental or physical abilities that are needed to perform the job.

Sukhsohit Singh successfully convinced IAS board and had won support from all over the country’s doctors, thalassemia NGO’s and media. Today he is a Deputy Controller and Financial Advisor at the Ministry of Defence (Finance), Government of India, based out of Pune, handling major financial matters pertaining to the Indian Armed Forces.