Pseudo rosettes are seen in all except
Neuroblastoma
Retinoblastoma
Medulloblastoma
Thecoma
Thecomas or theca cell tumors are benign ovarian neoplasms composed only of theca cells. Histogenetically they are classified as sex cord-stromal tumours. They are typically estrogen-producing and they occur in older women (mean age 59; 84% after menopause). Refer Robbins page no 1051
Nervous system