Doctors found the tumours 'quite big' and advised her biopsy to check on possible malignancy.
The biopsy report is expected on May 12.
Taslima appears very worried, because her mother had died of cancer and a brother of hers is undergoing treatment for cancer in New York.
Taslima has tweeted about her worries and said she had a sumptuous meal of Hyderabadi Biryani at New York's Paradise restaurant immediately after her biopsy.
She arrived in New York a week ago to avoid the harsh Indian summer at this time of the year and enjoy the weather in New York.
But the sickness has ruined that.
Taslima is a doctor, having received her MBBS degree from Mymensingh Medical College in 1986.
Besides working as a doctor, she continued with her passion -- writing.
After her novel 'Lajja' (Shame) hit the stands, she incurred the ire of the fundamentalists and had to leave Bangladesh in 1998.
She has lived in India and several western countries since then.