A Case of Postpartum Anogenital Mammary-Like Gland Tumor with Focal Lactational Features: A Nomenclature Issue

Table 1

Diagnostic terminology and histological features used to describe lesions arising from anogenital mammary-like glands.

Study	Diagnostic term	Descriptive features
Scurry et al. [5]	Mammary-like gland adenoma	Diverse histological appearances, combinations of cystic and solid areas, and tubular and papillary growth. Apocrine metaplasia common (57%). Constituent stroma sclerotic or desmoplastic, variable in amount.
Donati et al. [7]	Adenoma of anogenital mammary-like glands	Abundant fibrous stroma surrounding lobular arrangements of glands associated with branching ducts.
Ahmed et al. [8]	Adenoma of anogenital mammary-like glands	Glands and ducts within a dense fibrotic stroma reminiscent of breast intracanalicular fibroadenoma.
Konstantinova et al. [9]	Composite neoplastic lesion of the vulva with mixed features of fibroadenoma and hidradenoma papilliferum combined with pseudoangiomatous stromal hyperplasia	Branching, elongated glands within a cellular stroma, and anastomosing tubules separated by fibrous tissue and focal papillae.
Nishie et al. [10]	Hidradenoma papilliferum with mixed histopathologic features of syringocystadenoma papilliferum and anogenital mammary-like glands	Exo- and endophytic papillary tumor with maze-like pattern, abundant fibrous tissue and apocrine epithelium. In the deep dermis were underlying large tubular glands with surrounding fibrous tissue resembling normal mammary glands.
Kazakov et al. [11]	Unusual hyperplasia of anogenital mammary-like glands	Complex compact lobular proliferation of small ducts with fibroadenomatous and adenosis like areas.