• The Korean Journal of Cytopathology
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• v.3 no.2
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• pp.67-74
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• 1992

Apocrine carcinoma is a rare form of breast malignancy and is composed of entirely or predominantly of apocrine type epithelial cells. Apocrine metaplastic cells are frequently noted in fine needle aspiration cytology(FNAC) of breast lesions, especially fibrocystic disease. These apocrine cells may occasionally be atypical, to make a diagnostic difficulty. Two cases of apocrine carcinoma of the breast diagnosed by FNAC are described, and differential cytologic points between apocrine metaplasia and apocrine carcinoma are discussed. The first case is a right breast mass of a 37-year-old woman for 20 days. The smears show many single or sheets of large cells on bloody background. Each cell has a large vesicular nuclei with multiple macronucleoli and abundant eosinophilic granular cytoplasm. The second case is a left breast mass of a 35-year-old woman for one month. The smears show similar findings as seen in the first one. Histopathologic findings of both cases are typical of apocrine carcinoma. Electron microscopy demonstrates variable numbers of large osmiophilic granules in diameter of $200\sim600nm$ in both cases.

• The Korean Journal of Cytopathology
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• v.14 no.2
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• pp.76-81
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• 2003

Apocrine carcinoma of the breast is a very rare subtype. Although it has no clinical differences from usual ductal carcinoma of the breast, it should be categorized as a subtype of breast carcinoma because the cells of apocrine carcinoma reveal characteristic abundant eosinophillic cytoplasms with intraductal apical snouting as well as round or oval nuclei and central macronucleoli. On fine needle aspiration cytology, the cells of apocrine carcinoma have a lot of similarity to benign or reactive apocrine cells of the breast. Therefore, it is difficult to make a differential diagnosis of apocrine carcinoma from mammary neoplasms with similar cytologic findings unless the subtle cytologic differences are recognized. We report the cytologic and histologic findings of a case of apocrine carcinoma in the breast of a 40-year-old female patient. After the fine needle aspiration cytology, she received the lumpectomy and lymph node dissection. The cellularity was moderate to high. The cytoplasmic borders of tumor cells of three-dimensional clusters were relatively distinctive, and the cytoplasm was abundant, eosinophilic, and granular. Although the nuclear/cytoplasmic ratio was low, the nuclei of the cells were variable in size and shape with prominent macronucleoli. Histologically, it was a typical invasive apocrine carcinoma, showing numerous cytoplasmic lysosomes and mitochondriae on electron microscopy.

• Archives of Plastic Surgery
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• v.47 no.1
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• pp.83-87
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• 2020

Extramammary Paget disease (EMPD) is an uncommon malignancy that occurs in apocrine gland-rich areas of the body. EMPD of the axilla is rare, but a few cases have been reported. Some cases of EMPD have been reported with underlying apocrine adenocarcinoma; rarely, mammary-type ductal carcinoma can accompany EMPD. Here, we report a very rare case of EMPD with apocrine adenocarcinoma and invasive mammary-type ductal carcinoma. A 55-year-old woman was referred with a brownish pigmented plaque accompanying an area of ulceration in the left axilla. A preoperative biopsy indicated Paget disease, and an additional evaluation was performed to determine whether it was of primary or secondary origin. A wide excision was made, and the axilla was reconstructed using a thoracodorsal artery perforator flap. The biopsy showed apocrine adenocarcinoma and invasive mammary-type ductal carcinoma with pagetoid spreading. The patient had no evidence of recurrence or other postoperative complications.

• Korean Journal of Veterinary Research
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• v.35 no.2
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• pp.353-360
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• 1995

Gross and light microscopic findings are described for 34 canine sweat gland neoplasms including tumors derived from apocrine gland in anal sac and ceruminous gland in ear. Affected dogs are usually 5.2 years and sex predilection have not been seen. Sweat gland carcinoma(n=19) is predominant type for sweat gland neoplsm, while papillary syringadenoma(n=2) and spiradenoma(n=2) are rare type in this study. Distinct patterns identified in cutaneous sweat gland carcinoma are tubular(n=7), solid(n=5), mixed(n=4), papillary(n=2) and signet-ring(n=1). Mixed tumors which are characterized by myxomatous and chondroid metaplasia are seen in cutaneous sweat and ceruminous gland. The carcinoma derived apocrine gland of the anal sac induces humoral hypercalcemia of malignancy in two dogs in this study. Histologically, apocrine gland carcinoma of the anal sac has distinct rossette formation.

• Journal of Veterinary Clinics
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• v.33 no.1
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• pp.74-79
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• 2016

A 7-year-old female Pointer dog with multiple masses in the axilla, mammary gland, and bladder was submitted to the Pathology Department of the College of Veterinary Medicine in the Jeju National University. Grossly, mass between right axilla and 1st mammary gland, $15{\times}10cm$ in size, was well delineated and firm, slightly soft center, oval shape. And masses in right 1st, 3rd and 5th mammary gland were well delineated and sulphur yellow in color on the cut-surface. Numerous round to oval shaped masses, 0.3 to 2 cm in diameter were existed in the lung. Urinary bladder mucosa had rough and thick and round to oval papillary masses, 0.1 to 2 cm in diameter, on surface. Microscopically, masses in right axilla, 1st mammary gland, lung and axillary lymph node were composed of poorly differentiated tubules originated from apocrine gland. Lining neoplastic epithelium showed high mitotic figures, typical apical secretory blebs, and PAS-positive diastase-resistant cytoplasmic granules. Masses in 3rd and 5th mammary gland were confirmed as mammary complex adenoma and simple adenoma respectively. The masses in the urinary bladder were covered with stratified transitional epithelium with marked cellular atypia and high mitotic figures. Some neoplastic cells showed focal invasion into substantia propria of bladder. Immunohistochemaically, neoplastic transitional epithelium demonstrated positive reactions for cytokeratin 7, AE1/AE3, and MNF116. Based on the gross, histopathologic and immunohistochemical characteristics, this dog was diagnosed as apocrine carcinoma, mammary gland tumor including simple adenoma and complex adenoma and bladder transitional cell carcinoma. And distant metastases of apocrine carcinoma in right axilla were observed in axillary lymph node and lungs. This is the first report for concurrent occurrence of apocrine carcinoma, mammary gland tumor, and transitional cell carcinoma in a same dog.

• Journal of Veterinary Clinics
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• v.29 no.1
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• pp.103-106
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• 2012

A 15-year-old, spayed-female Maltese dog was presented with history of erythema and pruritus in left axillary region. In physical examination, firm elevated erythematous lesions were distributed throughout the axillary lesion. Fine needle aspiration cytology showed neoplastic epithelial cells with anisocytosis, high N:C ratio, and prominent nucleoli. Histologically, this lesion was consisted of a proliferation of undifferentiated neoplastic cells with eosinophilic cytoplasm. Mitotic figures of the neoplastic cells were observed and the neoplastic cells were intensely positive for cytokeratin. The presenting tumor was diagnosed as dermal apocrine gland adenocarcinoma.

• 대한세포병리학회:학술대회논문집
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• 1992.06a
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• pp.18.1-18.1
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• 1992

• 대한세포병리학회:학술대회논문집
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• 1992.11a
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• pp.10.2-11
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• 1992

• The Korean Journal of Cytopathology
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• v.10 no.1
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• pp.27-34
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• 1999

Benign and malignant papillary neoplasms of the breast may be difficult to distinguish in both cytologic and histologic preparations. To define the cytologic features of benign and malignant papillary lesions, we retrospectively reviewed 18 cases of fine needle aspirates from histologically confirmed cases of papilloma or papillary carcinoma of the breast. This study included 3 intraductal papillary carcinomas, 3 invasive papillary carcinomas, and 12 intraductal papillomas. Ail cases were evaluated for presence or absence of papillary fragments, bloody background, apocrine metaplasia, macrophages, and degree of cellularity, atypia, and single isolated columnar epithelial cells. Papillary fragments were present in all cases. The background of the smear was bloody in all 6 carcinomas, but in only 7 out of 12 papillomas. Markedly increased cellularity was present in 4 carcinomas(67%) and 7 papillomas(58%). Single cells were present in 5 carcinomas(83%) and 8 papillomas(67%). The majority of papillomas and papillary carcinomas had mild to moderate atypia, and severe atypia was noted in one case of intraductal papillary carcinoma and one case of invasive papillary carcinoma. Apocrine metaplasia was absent in all cases of papillary carcinomas, but present in 8 papillomas(57%). Macrophages were noted in 4 carcinomas and were present in all cases of papillomas. The constellation of severe atypia, bloody background, absence of apocrine metaplasia and/or macrophages were features to favor carcinoma. Malignant lesions tended to show higher cellularity and more single isolated cells. The cytologic features mentioned above would be helpful to distinguish benign from malignant papillary lesions of the breast. However, because of overlapping of cytologic features, surgical excision should be warranted in all cases on papillary lesions of the breast to further characterize the tumor.

• Archives of Plastic Surgery
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• v.34 no.4
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• pp.504-507
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• 2007

Purpose: Chondroid syringoma, previously known as 'mixed tumor of the skin', is a rare benign tumor. It usually presents an asymptomatic solitary firm intradermal or subcutaneous slowly growing nodule. It occurs frequently in the head and neck region of middle-aged men. We would like to report an uncommon chondroid syringoma about the clinical and histologic presentation. about the clinical and histologic presentation. Methods: We experienced two cases of chondroid syringoma on the nose and the upper lip, each other. Both masses were totally excised with clear margin. Results: On histologic examination, the masses showed a biphasic pattern-an epithelial component exhibiting apocrine/eccrine differentiation and a stromal component exhibiting myxoid/collagenous change-consistent with the diagnosis of chondroid syringoma. There have been no evidence of recurrence and malignant transformation during postoperative follow-up. Conclusion: There is no one distinctive clinical feature that is specific for chondroid syringoma. However, it should be included in the differential diagnosis of a solid nodule in head and neck region with long standing duration, such as epidermal inclusion cyst, pilomatrixoma, dermoid cyst, sebaceous cyst, neurofibroma, and basal cell carcinoma.