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Breynia pseudorostrata Huan C. Wang & Feng Yang, sp. nov. (Figs. 1 and 2) Diagnosis:��� Morphologically, Breynia pseudorostrata is most similar to B. rostrata Merrill (1927: 346), but clearly differs from the latter by having ovate to elliptic (ovate-lanceolate to oblong-lanceolate in B. rostrata) leaf blades with broadly rounded to acute apex (acuminate tips in B. rostrata), stigmas with 2 shallow and completely inflexed lobes (bifid, sharp, erect in B. rostrata), and apex of capsules subtruncate (beaked in B. rostrata). Type:��� CHINA. Yunnan Province: Eshan County, Shuangjiang town, Dengyun village, 24��2���25��� N, 102��10���59��� E, elev. 1015 m, 3 October 2019, H. C. Wang et al. ES8201 (holotype YUKU!, isotypes YUKU!). Description Evergreen shrubs, monoecious, 0.5���2 m tall, usually completely glabrous throughout; branching phyllanthoid. Main stems and ultimate branchlets terete. Cataphylls on the main stems spiral, triangular, ca. 1 mm long. Leaves on ultimate branchlets distichous, well developed; stipules triangular-lanceolate, ca. 1 mm long, distinctly shorter than the petiole; petiole short, 2���3 mm long; leaf blades ovate to elliptic, sometimes slightly obovate, 2���5 cm long, 1.5���2.5 cm broad, papery, base obtuse to rounded, margin entire, slightly undulate when drying, apex broadly acute to rounded, adaxially green, abaxially grey or glaucous; venation pinnate, midrib elevated abaxially, lateral veins 3���6 pairs, arcuately anastomosing before margins, slightly elevated abaxially, flattened adaxially, reticulate veins obscure. Flowers axillary, usually in fascicles of staminate and pistillate flowers, sometimes solitary, staminate proximal, pistillate distal. Staminate flowers yellow-green or orange-yellow, rarely green, 2.5���4 mm in diameter; pedicels 3���10 mm long, slender, slightly broadening upwards; calyx turbinate, with 6 scales at rim of calyx tube; calyx scales imbricate, horizontally inflexed, biseriate, outer scales small, rounded, inner ones oblong; stamens 3, united into central vertical androphore, androphore ca. 1 mm long with apical anthers along it. Pistillate flowers green, pedicels 2���5 mm, not lengthening in fruit; sepals 6, connate at base, biseriate, slightly enlarged and reflexed in fruit, outer sepals small, ovate, apex acute, inner ones oblong to broadly obovate; ovary ovately cylindric, ca. 1 mm in diameter, 3-locular, ovules 2 per locule; styles ca. 2 mm, stout, erect, stigmas 3, with 2 shallow lobes, lobes almost completely inflexed. Capsules globose, tapering towards apex, 6���7 mm in diameter, with flat or slightly reflexed persistent sepals, apex with persistent stigmas; peel fleshy, tardily dehiscent; aril yellow-red or orange-red. Seeds brown, ca. 3 mm long. Phenology:��� According to our field investigations, Breynia pseudorostrata flowers and fruits from June to November. Etymology:��� The specific epithet is derived from the Greek pseudo (meaning resembling but not equaling) and the epithet of species Breynia rostrata Merrill, to which the newly named species is closely related. Habitat and distribution:��� Breynia pseudorostrata is found in Central Yunnan Province, southwest China. It usually occurs in montane slope, scrub and sunny forest margins at elevations of 300���2000 m. Additional specimens examined (paratypes): CHINA. Yunnan: Shuangbai County, Ainishan village, elev. 1450 m, 1 October 1958, S. C. Huang 0132 (KUN); Yimen County, Luzhijiang valley, near Xiaoluzhi village, 9 August 2016, X. D. Ma et al. YM1043 (YUKU); same location, 25 September 2019, H. C. Wang et al. YM8057 (YUKU); Xinping County, elev. 1316 m, 8 August 2019, H. C. Wang et al. XP8552 (YUKU); Yuanyang County, Nansha town, valley, slope-foot, under sparse forest, 23��12��� N, 102��53��� E, elev. 300 m, 12 November 1973, D. D. Tao 1533 (KUN, HITBC); same location, 31 May 1974, Luchun team 1341 (KUN); same location, 10 October 1991, G. D. Tao 47593 (HITBC). Discussion Breynia pseudorostrata is characterized by its unique style structure in genus Breynia. It shows remarkable similarities with B. rostrata, but clearly differs from the latter in its shape of leaf blade, calyx lobes of pistillate flowers, stigmas and the apex of fruit (Fig. 3). The leaves of B. pseudorostrata are usually ovate to elliptic, sometimes slightly obovate, 2���5 �� 1.5���2.5 cm, with broadly acute to rounded tips, its stigmas are with 2 shallow lobes, lobes are almost completely inflexed, and its apex of capsule is subtruncate. In contrast, leaves of B. rostrata are usually ovate-lanceolate to oblonglanceolate, 3���7 �� 1.5���3 cm, with acuminate tips, stigmas are bifid, sharp, erect, and apex of capsule is beaked. Breynia retusa (Dennstedt 1818: 31) Alston (1929: 204) is somewhat similar to B. pseudorostrata in leaf shape, but differs from the new species in having smaller leaves size, and sepals enlarged from 4���6 mm to ca. 12 mm in diameter in fruit, stigmas with 3 short forked arms, and apex of fruit smooth or with a shallow ring. A morphological comparison of B. pseudorostrata with its similar species is provided in Table 1., Published as part of Yang, Feng, Li, Ping-Ping, Liu, Jin-Li, Wang, Qiu-Ping & Wang, Huan-Chong, 2022, Breynia pseudorostrata (Phyllanthaceae), a new species from Yunnan, Southwest China, pp. 210-216 in Phytotaxa 539 (2) on pages 211-215, DOI: 10.11646/phytotaxa.539.2.8, http://zenodo.org/record/6358250, {"references":["Dennstedt, A. W. (1818) Schlussel zum Hortus indicus malabaricus: oder dreifaches register zu diesem werke. Landes-Industrie-Comptoir, Weimar, 40 pp.","Alston, A. H. G. (1929) Names published in Moon's Catalogue. Annals of the Royal Botanic Gardens. Peradeniya 11: 203 - 205."]}

Rationale: Undifferentiated carcinoma with osteoclast-like giant cells (UC-OGCs) of the pancreas is an extremely rare and aggressive pancreatic malignancy. To our knowledge, the computed tomography (CT) findings of this disease have rarely been analyzed. Patient concerns: A 65-year-old man who experienced weight loss of about 4 kg over 3 months presented to our clinic. The abdominal ultrasound (US) detected a 5.8 × 5.5 cm well-defined, cystic-solid mass in the head of the pancreas, which had been present for 1 month. Diagnosis: A benign pancreatic tumor was initially suspected on the basis of the US findings. The patient then received serum tumor markers and CT examinations for further diagnosis, including carbohydrate antigen 199 (CA199), carcinoembryonic antigen (CEA), carbohydrate antigen 125 (CA125), contrast-enhanced CT (CECT) and CT angiography (CTA). His CA199, CEA, and CA125 marker levels were normal, which supported the diagnosis of a benign tumor. CECT showed a well-defined cystic-solid mass in the head of the pancreas, with a slightly enhanced solid portion and pancreatic ductal dilatation, which led us to consider the possibility of a malignant tumor. CTA revealed that the tumor nourishing arteries emitted from the pancreaticoduodenal superior and inferior arteries into the mass. Then, the patient underwent a pancreaticoduodenectomy. Finally, postoperative pathology and immunohistochemistry confirmed UC-OGC of the pancreas. Interventions: The patient has been treated by a pancreaticoduodenectomy alone. Outcomes: The operation had no complications, and the patient recovered well after surgery. Ten months after surgery, the patient reviewed the CECT, and no recurrence or metastasis was noted. Lessons: Old patients with cystic-solid lesions in the pancreas should be aware of UC-OGC. CT findings usually show a clear boundary and a slightly enhanced mass with pancreatic duct expansion.