Table 1.

Clinical-characteristics, radiographic and pathologic features of primary teratoma of the kidney

Source, year	Side	Age	Sex	Clinical presentation	Radiographic features of renal mass	Components of teratoma
Kojiro et al., [6]	Left kidney	40 years	Male	Epigastric pain, nausea, no carcinoid syndrome	IVU: Marked dilatation of left renal pelvis	Mucous secretory glands, columnar epithelium, mature hyaline cartilage, smooth muscle
Fetissof et al., [7]	Right kidney	65 years	Male	Fever, no carcinoid syndrome	IVU: Displaced left kidney and non-visualized right kidney	Transitional and mucinous columnar epithelium, smooth muscle, ossified chondroid plaques, nerve bundles with ganglion cells
Lodding et al., [8]	Right kidney	23 years	Male	Abdominal pain, no carcinoid syndrome	CT: Calcification in horseshoe kidney	Mature bone
LIU et al., [5]	Left kidney	2 years	Female	Poor appetite and poor activity 1 week in duration	CT: Huge tumor in the left kidney with calcification and necrosis	Yolk sac tumor and immature teratoma
Singer et a.l, [9]	Left kidney	2 months	Male	Constipation and a palpable left flank mass	CT : Heterogeneous upper pole left renal neoplasm	Mature teratoma with rare
						foci of immature elements
Govender et al., [10]	Right kidney	3 years	Female	Bilateral coarse crackles and a wheeze. Abdominal distension	CT: Large tumour involving The right side of the abdomen	Mature renal teratoma and a synchronous malignant neuroepithelial tumour of the ipsilateral adrenal gland
Otani et al., 2001 [11]	Left kidney	6 years	Male	Mass of a left side abdominal	CT: Multiple cystic masses	Keratinizing squamous epithelium with hair follicles, shafts and sebaceous glands. atrophy of the adjacent renal parenchyma, with partially dysplastic and angiomyolipoma
Yoo et al., [12]	Left kidney	30 years	Female	Abdominal pain, no carcinoid syndrome	CT: Dense calcification with minimal contrast enhancement	Mucinous columnar epithelium, smooth muscle, mature bone
Yaqoob et al., [13]	Left kidney	2 months	Female	Firm mass on left side of the abdomen, which was crossing to the right side as well	X-ray : soft tissue mass with areas of calcification Ultrasound : complex mass partly cystic and partly solid	Cystic spaces lined by keratinizing stratified squamous epithelium with skin adnexae
Kim et al., [14]	Right kidney	39 years	Female	Asymptomatic, incidental renal mass, no carcinoid syndrome	CT: mass relatively well demarcated and incompletely marginated by a thin hypodense rim with globular calcifications	Mucinous columnar and Pseudostratified columnar epithelium with occasional cilia, mature bone
Kurzer et al., [15]	Right kidney	58 years	Female	Asymptomatic, incidental renal mass, no carcinoid syndrome	CT: Round mass, smooth, and well marginated, with two solid clumps of calcifications	Transitional, colonic, squamous, and nonspecific cuboidal epithelium, mature adipose, focal osseous metaplasia
Choi et al., [16]	Right kidney	4 years	Female	Right-sided abdominal mass	US : tumor with intermediate echogenicity and an ovoid, hypoechoic central region	Adipose tissue. squamous epithelial with abundant keratinous flakes. pilosebaceous adnexal elements
Ledo et al., [17]	Left kidney	4 months	Male	Left -sided abdominal mass	CT: Heterogeneous tumor, amorphous calcifications	Mature teratoma
Kyoko et al., [18]	Right kidney	6 days	Female	Hard mass of 6 × 6 cm in diameter, in the right upper abdomen	CT: mass containing low-density areas from the isthmus to the right lower pole of a horseshoe kidney	Mature tissu contained neuroepithelial components
Henry B Armah et al., [19]	Right kidney	35 years	Female	Right flank pain, right costovertebral angle tenderness, no carcinoid syndrome	CT: Exophytic, round, well-circumscribed mildly complex hypodense with globular calcifications	Urothelial-type and colonic epithelium,focal mature bone
Madhumita et al., [20]	Right kidney	1 month	Male	Mass in the right side of theabdomen since birth	CT: soft tissue density mass with fat and fluid components arising from the right kidney. Multiple calcifications duplication of the cecum and Appendix	Mature benign teratoma
Current case	Left kidney	6 months	Female	Abdominal distension and pain	US: pelvic left kidney measuring 18 cms in diameter with an important expansion of the excretory cavities and internal cystic and solid changes CT: mass containing low-density areas of the left kidney	keratinizing stratified squamous epithelium with skin adnexae, cartilage, mucinous columnar epithelium,bone, melanin containing cells and neuroglial cells with occasional foci of immature neuroectodermal tissue

IVU IntraVenous Urography, CT Computed tomography, US ultrasonography.