| Case number | Agea | Sex | Primary site | Histologyb | Recurrence or metastasisa | Treatmentc | Follow-upa |
| 1 [4] | 13 yr. | M | Scrotum | ERMS and GCs | Retroperitoneum Met. after 2 yr. | DS, CT, and RT | NA |
| 2 [5] | 10 yr. | F | Intracranial | US with rhabdoid features and NB | Local Rec. after 5 wk. | TSR | NED after 12 mo. |
| 3 [6] | 19 mo. | M | Pelvic | ERMS and NB | Local Rec. and BM Met. after 8 yr. | TSR and CT | NED for 8 yr., NA after Met. |
| 4 [7] | 11 mo. | M | Intra-abdomen | US with rhabdoid features and NB | Liver, lung, and BM Met. at the time of presentation | DS, CT, and RT | DOD after 9 mo. |
| 5 [8] | 61 yr. | M | Retroperitoneum with invasion to vertebral bone | ERMS and GN | No | DS and RT | DOD after 14 mo. |
| 6 [9] | 1.5 yr. | M | Upper lip | ERMS and GCs | Local Rec. after 1 yr. | TSR and CT | NED for 1 year, NA after Rec. |
| 7 [10] | 4 mo. | M | Pelvic | ERMS, GCs, and schwannoma | NA | TSR and CT | NA |
| 8 [11] | 17 mo. | M | Left wrist | RMS, CRS, GNB | No | TSR and CT | NED after 4 yr. |
| 9 [12] | 10 yr. | F | Intracranial | ERMS and NB | No | TSR, CT, and RT | NED after 6 yr. |
| 10 [13] | 10 d. | F | Face | RMS and GCs | No | Biopsy and CT | DOD, after a few days |
| 11 [14] | 4 yr. | F | Intracranial | US with focal rhabdomyoblastic diff. and GCs | Lung Met. at the time of presentation | TSR and CT | DOD after 10 wk. |
| 12 [15] | 8 mo. | M | Scrotum | ERMS and GC | NA | TSR and CT | NA |
| 13 [16] | 10 yr. | M | Intracranial | US and GCs | No | TSR, CT, and RT | NED after 20 mo. |
| 14 [17] | 36 yr. | F | Ethmoid sinus and orbit | RMS and NB | No | Biopsy, CT, and RT | NED after 28 mo. |
| 15 [18] | 6 mo. | F | Vagina | ERMS and GCs | Abdomen-pelvic Met. after 4 mo. | DS and CT | DOD after 15 mo. |
| 16 [19] | 43 yr. | F | Nasal cavity | RMB and NB | No | Biopsy, CT, and RT | NED after 10 mo. |
| 17 [20] | 6 yr. | M | Intracranial, frontal lobe | US and GCs | No | TSR, CT, and RT | NED after 2 years |
| 18 [2] | 4 yr. | F | Orbit | ERMS and NB | No | TSR, CT, and RT | NED after 12.9 years |
| 19 [2] | 2.5 mo. | F | Upper arm | ARMS and pPNET | No | TSR and CT | NED after 13.7 years |
| 20 [2] | 13.5 yr. | M | Buttock | ARMS and NB | Local Rec. and lungs Met. after 1.1 yr. | DS, CT, and RT | DOD after 1.3 years |
| 21 [2] | 1 yr. | M | Groin | ERMS and NB | No | TSR and CT | NED after 5 years |
| 22 [2] | 7 mo. | F | Sole | ERMS and NB | Local Rec. after 5 mo. | TSR and CT | NED after 2.3 years |
| 23 [2] | 8 mo. | M | Intra-abdomen | ERMS and NB | Local Rec. after 1.4 yr. | TSR and CT | NED after 2.1 years |
| 24 [21] | 5 mo. | M | Mediastinum with invasion into lung and SVC | RMS and pPNET | No | DS and CT | DOD after 11 mo. |
| 25 (Our case) | 6 mo. | M | Inguinal and pelvic | ARMS and NB | Cerebellum Met. after 21 mo. | Biopsy, CT, and RT | NED after 3 yr. |
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ARMS, alveolar rhabdomyosarcoma; BM, bone marrow; CRS, chondrosarcoma; CT, chemotherapy; diff., differentiation; DOD, dead due to disease; DS, debulking surgery; ERMS, embryonal rhabdomyosarcoma; F, female; GC, ganglion cell; GN, ganglioneuroma; GNB, ganglioneuroblastoma; M, male; Met., metastasis; mo., month(s); NA, no data available; NB, neuroblastoma; NED, no evidence of disease; pPNET, peripheral primitive neuroectodermal tumor; Rec., recurrence; RMB, rhabdomyoblastoma; RMS, rhabdomyosarcoma; RT, radiation therapy; SVC, superior vena cava; TSR, total surgical resection; US, undifferentiated sarcoma; wk, week(s); yr., year(s); aage, recurrence/metastasis and follow-up since first diagnosis; bitdescribes which tumor components were present in respect to diagnosis of MEM; citdescribes type of treatment on the primary tumor.
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