<prompt> Ectopic ACTH production is seen in-Small cell carcinoma is lungAnaplastic carcinoma of lungSquamous cell carcinoma of lungAdenocarcinoma of cerebellum  <response>: Reference :Robbins basic pathology 9th edition pg no 222:Cushing syn drome arising as a paraneoplastic phenomenon usually is related to ectopic production of ACTH or ACTHlike poly peptides by cancer cells, as occurs in small cell cancers of the lung 