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| Year | Author | Age/sex | Chief complaint | Invaded organ | Colonoscopic findings at SC or rectum | Biopsy at SC or rectum | CT findings | Preoperative diagnosis | Surgical procedure/postoperative therapy | Histological type WHO 2010 | pTNM UICC 8th | Follow-up |
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| 1975 | Andersson et al. [4] | 82/F | Constipation, abdominal pain | SC | n.m. | n.m. | n.m. | n.m. | Ap, Sg | ANOS | n.m. | Dead (180 days) |
| 1985 | Yamada et al. [5]# | 67/F | Abdominal mass | SC, ileum | n.m. | n.m. | n.m. | Cystomyxoma | ICR, closure of fistula/n.m. | AMN or MA | n.m. | n.m. |
| 1990 | Corder et al. [6] | 67
/M | Hematochezia, syncope | SC | Devoid of mucosa | Granulation tissue | n.m. | n.m. | Ap, Sg, PC (en bloc)/no therapy | Low-grade AMN | n.m. | n.m. |
| 1993 | Kato et al. [7]# | 48/M | Ileus symptoms | SC, bladder | Fistula | n.m. | A distended appendix filled with high-density substance | Appendiceal cancer | ICR, Sg, PC (en bloc)/AC | MA | T4bN1-2M1b (PMP) | Alive (n.m.) |
| 1997 | Ito et al. [8]# | 49/M | Ileus symptoms | SC, ileum | Submucosal-tumor like lesion | MA | A mass connected with the vermiform appendix medial to the ileocecal part | Appendiceal cancer | ICR, HAR (en bloc)/AC | AMN | T4b N0 M0 | Alive (1080 days) |
| 1999 | Tanakaya et al. [9]# | 68/F | Hematochezia, abdominal pain | SC | Type 1 tumor (polypoid type) | n.m. | n.m. | SC cancer | Tumorectomy, colostomy/no therapy | AMN or MA | T4b NX M1b (PMP) | Dead (33 days) |
| 2004 | Sano et al. [10]# | 89/F | Hematochezia | RS | Type 2 tumor (ulcerated type with clear margin) | ANOS | No findings of metastasis | Rectal cancer | ICR, LAR, etc. (en bloc)/no therapy | AMN or MA, partly ANOS | T4b N0 M0 | Alive (n.m.) |
| 2007 | Kumon et al. [11]# | 80/F | Hematochezia | RS | Rough and red mucosa, stenosis | ANOS | A rectal mass with heterogeneous enhancement continuous with appendix | Rectal cancer | ICR, AR (en bloc)/no therapy | AMN or MA | T4b N0 M1c (no. 251) | Alive (150 days) |
| 2009 | Murphy and Matar [12] | 38/M | Hematochezia, abdominal pain | SC, ileum, bladder | n.m. | n.m. | A complex mass, arising in the lower abdomen, incorporating the caecum, small intestine, and sigmoid colon | Crohn’s disease, SC, or ileal cancer | RHC, Sg, PC (en bloc)/AC | “Moderately differentiated, partly MA” | T4b N0 M0 | Alive (300 days) |
| 2009 | Stojanovic et al. [13] | 55/F | Hematochezia | SC | External compression, tumor infiltration | n.m. | Sigmoid colon infiltrated by hypodense irregular tumor mass connected to the end of the appendix | Appendicular cancer | Laparoscopic RHC, Sg (en bloc)/no therapy | MA | T4b N0 M0 | Alive (60 days) |
| 2009 | Mori et al. [14]# | 58/F | Abdominal discomfort | SC | Elevated lesion | Granulation tissue | A 1 cm width dilated appendix | Appendiceal cancer | RHC, Sg/AC | AMN or MA | T4b N0 M0 | Alive (600 days) |
| 2013 | Shibata et al. [15]# | 44/M | Hematochezia, diarrhea | SC | Stenosis | ANOS or MA | A pelvic tumor extended from the ileocecal part to the sigmoid colon | SC cancer or appendiceal cancer | Bypass, sigmoidostomy/chemotherapy | “Atypical, mucin-producing adenocarcinoma” | T4b NX M1b | Dead (210 days) |
| 2016 | Fitzgerald et al. [16] | 75/F | Hematochezia | Rectum | Fingerlike/frond-like polyp | Adenoma | A dilated appendix with its tip near the rectum | n.m. | Ap, AR (en bloc)/n.m. | “Adenocarcinoma” | T4b N0 M0 | n.m. |
| 2016 | Hakim et al. [17] | 68/M | Abdominal pain, constipation | SC, cecum | n.m. | n.m. | A dilated appendix with an 8 cm long, ovoid, periappendiceal mass containing a fistula to sigmoid colon | n.m. | Cecectomy, Ap, Sg, PC etc. (en bloc)/no therapy | MA | T4b N0 M0 | Alive (360 days) |
| 2018 | Takahashi et al. [18] | 13/F | Hematochezia, abdominal pain | SC, uterus, ovary | n.m. | n.m. | A mass with fecalith in the pelvic and right lower abdominal cavity | Acute appendicitis | ICR, Sg/AC | “Primary appendiceal adenocarcinoma” | T4b N0 M0 | Alive (1800 days) |
| 2018 | Tokai et al. [19]# | 66/M | Positive fecal
occult blood test | SC | Elevated lesion | MA | A sized cystic tumor adjacent to the sigmoid colon and cecum | Appendiceal cancer | ICR, Sg, ileectomy (en bloc)/AC | MA | T4b N1 M0 | Alive (900 days) |
| Our case | 69/F | Hematochezia, anorexia | SC | Type 1 tumor (polypoid type) | ANOS | An appendiceal mass at the distal part of appendix, involving sigmoid colon | Appendiceal cancer | ICR, Sg (en bloc)/no therapy | ANOS | T4b N0 M0 | Alive (600 days) |
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