SMARCA4-deficient undifferentiated cervical carcinoma is an extremely rare and aggressive malignancy, and effective treatment options are lacking. We experienced a rare case involving a patient with SMARCA4-deficient undifferentiated cervical carcinoma who was successfully managed in the long term. A woman in her 40s presented with a chief complaint of abnormal vaginal bleeding. A cervical biopsy revealed adenocarcinoma; thus, radical hysterectomy was performed with R0 tumour resection. Histopathological examination of the resected tumour showed rhabdoid features under (H&E) staining and negativity for SMARCA4 under immunohistochemical staining. Given the poor prognosis associated with SMARCA4-deficient carcinoma, adjuvant radiotherapy was added. Follow-up for more than a year revealed no evidence of recurrence. For undifferentiated cervical carcinoma with rhabdoid features on H&E staining, SMARCA4 immunostaining may be considered for risk classification and recurrence prevention. R0 resection and postoperative adjuvant radiotherapy may contribute to a good prognosis for patients with SMARCA4-deficient carcinoma.
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